Two boats sail away from a buoy making a 90 degree angle. The first boat is 165 meters away and is traveling at 25 m/s. The second boat has been traveling at 35 m/s for pi mINUTES. What is the rate of change in distance between the two boats?

Answers

Answer 1

Answer:


Step-by-step explanation:

lets say in the shown triangle x=165

so speed [tex]\frac{dx}{dt} =25[/tex]

and  [tex]\frac{dy}{dt} =35[/tex]


Also since distance = speed* time

time = pi minutes = pi/60 seconds

y = [tex]\frac{35\pi \pi }{60}[/tex]

y = [tex]\frac{7\pi }{12}[/tex]


Now using the pythagorean :

[tex]x^2+y^2=z^2\\so \\165^2+(\frac{7\pi }{12} )^2 =z^2[/tex]

derivate the equation so  we get :

[tex]x\frac{dx}{dt} +y\frac{dy}{dt} =z\frac{dz}{dt} \\[/tex][tex]165*25+35*\frac{7\pi }{12}=\sqrt{165^2+(\frac{7\pi }{12})^2} *\frac{dz}{dt}[/tex]


[tex]\frac{dz}{dt} =25.387[/tex] m/s

So Rate of change = 25.387 m/s



Related Questions

Determine ‘a’ and ‘d’ for t7= 3 + 5x and t11= 3 + 23x (formula is tn= a + (n-1) x d)
(25 POINTS!!)

Answers

Final answer:

To determine 'a' and 'd' for tn = a + (n-1)x, substitute the values of 'n' and 't' into the equations and solve the system of equations.

Explanation:

To determine 'a' and 'd' for tn = a + (n-1)x, we need to find the values of 'a' and 'd' that satisfy both t7 = 3 + 5x and t11 = 3 + 23x.

Step 1: Set up two equations

t7 = 3 + 5x

t11 = 3 + 23x

Step 2: Use the formula tn = a + (n-1)x to substitute the values of 'n' and 't' in the equations.

a + 6d = 3 + 5x (equation 1)

a + 10d = 3 + 23x (equation 2)

Step 3: Solve the system of equations.

Subtract equation 1 from equation 2: (a + 10d) - (a + 6d) = (3 + 23x) - (3 + 5x)

Cancel out the 'a' terms and simplify the 'd' and 'x' terms: 4d = 18x

Divide both sides by 18: d = 4.5x

Substitute the value of 'd' in equation 1 to solve for 'a': a + 6(4.5x) = 3 + 5x

Expand and simplify the equation: a + 27x = 3 + 5x

Subtract 5x from both sides: a + 22x = 3

Subtract 22x from both sides: a = 3 - 22x

So, the values of 'a' and 'd' are a = 3 - 22x and d = 4.5x.

PLEASE HELP QUICK!!!!!!!!!!!!!!! 100 POINTS Please explain how to do this step by step. I'm super confused.

Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting two slanting rods, one of which, labeled PR, is shown:

A support structure is shown in which a right triangle PQR is formed with the right angle at Q. The length of PQ is shown as 14 feet, and the length of QR is shown as 6 feet..

Part A: What is the approximate length of rod PR? Round your answer to the nearest hundredth. Explain how you found your answer, stating the theorem you used. Show all your work. (5 points)

Part B: The length of rod PR is adjusted to 16 feet. If width PQ remains the same, what is the approximate new height QR of the scaffold? Round your answer to the nearest hundredth. Show all your work. (5 points)

Answers

Answer:

A: 15.23 ft, B: 7.75 ft

Step-by-step explanation:

A:

√(14² + 6²)

√(196 + 36)

√232 = 15.23

B:

√(16² - 14²)

√(256 - 196)

√60 = 7.75

NOTES:

Since Q is a right angle then PQ and QR are the legs and PR is the hypotenuse.  Use the Pythagorean Theorem to solve.

********************************************************************************

Part A Answer: PR = 15.23

Step-by-step explanation:

PQ² + QR² = PR²

6² + 14² = PR²

36 + 196 = PR²

    232    = PR²

     15.23 = PR

************************************************************************************

Part B Answer: PR = 7.75

Step-by-step explanation:

PQ² + QR² = PR²

PQ² + 14² = 16²

PQ² + 196 = 256

PQ² = 60

PQ = 7.75

Janelle babysat for 6 hours at an hourly rate.After she got paid she spent $12 at Walmart. She came home with $36. How much money did she make per hour?

Answers



the answer is 8$ dollars

By adding Janelle's spending to what she came home with and dividing by the hours worked, we find that she earned $8 per hour babysitting.

To find out how much Janelle made per hour babysitting, we need to add the money she spent at Walmart to the money she came home with.

This gives us the total amount she earned.

Since she spent $12 at Walmart and came home with $36, we add these two amounts together to get $48.

Janelle babysat for 6 hours, so to find out her hourly wage, we divide the total amount she earned ($48) by the number of hours she worked (6 hours).

= $48 / 6 hours = $8 per hour

Thus, Janelle earned $8 per hour for her babysitting.

Charlene sold 15 magazines subscriptions for the fundraiser. Mark sold 17 subscriptions and Paul sold 12. How many magazine subscriptions did they sell in all?

Let s represent subscriptions

Equation:______

They sold_____ subscriptions in all.

Answers

15+17+12= 44
The sold 44 magazine subscriptions in total.
Final answer:

Charlene, Mark, and Paul sold a combined total of 44 magazine subscriptions for their fundraiser.

Explanation:

In this problem, Charlene, Mark, and Paul collectively sold magazine subscriptions. We need to find the total number of subscriptions sold. We can do this using simple addition: Charlene sold 15 subscriptions, Mark sold 17 subscriptions, and Paul sold 12 subscriptions. Therefore, using s to represent total subscriptions, our equation would be: s = 15 (Charlene's sales) + 17 (Mark's sales) + 12 (Paul's sales). Summing the numbers, s = 44. Hence, they sold 44 subscriptions in total.

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A small airplane takes off from point A and continues to climb upward in a straight line, as shown in the diagram. What is the plane’s distance from point A when it reaches point C?

A. 6,900 feet

B. 7,000 feet

C. 11,636 feet

D. 12,600 feet

E. 13,400 feet

Answers

Answer:

The distance from A to C is 12600 ft

Step-by-step explanation:

We can use similar triangles to help us solve the problem.

5600 ft          AC

-------------  = --------------

5200 ft          5200 + 6500


5600 ft          AC

-------------  = --------------

5200 ft          11700

We can solve using cross products

11700* 5600 = AC *5200

65520000=5200 AC

Divide each side 5200

65520000/5200 = AC

12600 =AC

Answer:

12600

Step-by-step explanation:

What does pathagery and theorem solve for? Please help!!!

Answers

Answer:

The Pythagorean theorem shows that one leg squared plus the other leg squared is equal to the hypotenuse squared


Step-by-step explanation:


A developer has 7 1/2 acres of land to build houses on. If each house is to be built on 1/4 acre plot, how many houses can he build?

Answers

Answer:

He could build 30 houses.

Step-by-step explanation:

7 1/2 divided by 1/2 equals 30!

Answer: 30 houses can be built


Step-by-step explanation:


Find the circumference of each circle. Use 3.14 for the value of π . Round answer to the nearest tenth.

Answers

Answer:

[tex]C=9.4\pi[/tex] meters

Step-by-step explanation:

Recall to find the circumference of a circle the formula is [tex]C=\pi d[/tex] or [tex]C=2\pi r[/tex].

We start by substituting 4.7m for r in the second circumference formula.

[tex]C=2\pi r\\C=2\pi (4.7)\\C=9.4\pi [/tex]. We input this value of r into the area formula.


Answer:

its C.

Step-by-step explanation:

what type of green paint is made by mixing 2 cups of yellow with 3.5 cups of blue a.find a mixture that will make the same shade of green but a smaller amount

Answers

Answer:


Step-by-step explanation:

We are given that a shade of green is prepared using 2 cups of yellow and 3.5 cups of blue.

We want to make the same shade of green, but lesser quantity. We can assume a smaller value for either of the yellow or the blue colors, and find the corresponding value of the other to figure out the answer.

Let us assume that 1 cup of yellow is mixed with x cups of blue to prepare the same shade of the green. Now we can set up the ratios as shown below:

[tex]\frac{1}{x}=\frac{2}{3.5}\\2x=3.5\\x=1.75[/tex]

Therefore, 1 cup of yellow and 1.75 cups of blue color will also make the same shade of green

Which data set matches the box and whisker plot? A. 12.5, 15, 17, 23, 23, 24, 26, 29, 31, 32, 33 B. 11, 13, 16, 19, 23, 23, 24, 29, 31, 33, 34 C. 11, 12, 15, 18, 24, 24, 25, 27, 30, 32, 34 D. 10.5, 12, 15, 17, 23, 23, 24, 26, 29, 34

Answers

Answer:

c

Step-by-step explanation:


Can someone help me with my math
−36+x<8

Answers

Answer:

x<44

Step-by-step explanation:


Answer:

x<-28

Step-by-step explanation:


Solve for a. m=a/9-H

Answers

Answer:

9(m+H) = a

Step-by-step explanation:

m=a/9-H

The first step is to add H to each side.

m+H = a/9 -H+H

m+H = a/9

Now multiply both side by 9

9(m+H) = a/9*9

9(m+H) = a



Find dy, dx if f(x) = (x + 8)3x. 3xln(x + 8) the product of the quantity 3 times the natural log of the quantity x plus 8 plus 3 times x divided by the quantity x plus 8, and the quantity x plus 8 raised to the 3x power 3 times the natural log of the quantity x plus 8 plus 3 times x divided by the quantity x plus 8 3x(x + 8)(3x − 1)

Answers

Answer:

[tex]\displaystyle \frac{dy}{dx} = 3(x + 8)^{3x} \bigg[ \ln (x+ 8) + \frac{x}{x + 8} \bigg][/tex]

General Formulas and Concepts:
Calculus

Differentiation

DerivativesDerivative Notation

Derivative Property [Multiplied Constant]:                                                          [tex]\displaystyle \frac{d}{dx} [cf(x)] = c \cdot f'(x)[/tex]

Derivative Property [Addition/Subtraction]:                                                        [tex]\displaystyle \frac{d}{dx}[f(x) + g(x)] = \frac{d}{dx}[f(x)] + \frac{d}{dx}[g(x)][/tex]

Derivative Rule [Basic Power Rule]:

f(x) = cxⁿf’(x) = c·nxⁿ⁻¹

Derivative Rule [Product Rule]:                                                                            [tex]\displaystyle \frac{d}{dx} [f(x)g(x)]=f'(x)g(x) + g'(x)f(x)[/tex]

Derivative Rule [Chain Rule]:                                                                               [tex]\displaystyle \frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)[/tex]

Step-by-step explanation:

Step 1: Define

Identify.

[tex]\displaystyle f(x) = (x + 8)^{3x}[/tex]

Step 2: Differentiate

Exponential Differentiation [Derivative Rule - Chain Rule]:                      [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \frac{d}{dx} \bigg[ 3x \ln (x + 8) \bigg][/tex]Derivative Rule [Product Rule]:                                                                   [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ \frac{d}{dx}(3x) \ln (x + 8) + 3x \frac{d}{dx}[ \ln (x + 8)] \bigg][/tex]Rewrite [Derivative Property - Multiplied Constant]:                                 [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ 3 \frac{d}{dx}(x) \ln (x + 8) + 3x \frac{d}{dx}[ \ln (x + 8)] \bigg][/tex]Derivative Rule [Basic Power Rule]:                                                           [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ 3 \ln (x + 8) + 3x \frac{d}{dx}[ \ln (x + 8)] \bigg][/tex]Logarithmic Differentiation [Derivative Rule - Chain Rule]:                       [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ 3 \ln (x + 8) + \frac{3x}{x + 8} \frac{d}{dx} (x + 8) \bigg][/tex]Rewrite [Derivative Property - Addition/Subtraction]:                               [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ 3 \ln (x + 8) + \frac{3x}{x + 8} \Big[ \frac{d}{dx}(x) + \frac{d}{dx}(8) \Big] \bigg][/tex]Derivative Rule [Basic Power Rule]:                                                           [tex]\displaystyle \frac{dy}{dx} = (x + 8)^{3x} \bigg[ 3 \ln (x + 8) + \frac{3x}{x + 8} \bigg][/tex]Simplify:                                                                                                        [tex]\displaystyle \frac{dy}{dx} = 3(x + 8)^{3x} \bigg[ \ln (x+ 8) + \frac{x}{x + 8} \bigg][/tex]

∴ we have found the derivative of the given function.

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Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

9ab over 27b = simplify
9ab
___
27b

Answers

Answer:

1A/3 OR 1/3A

Step-by-step explanation:


to make 5 dinner rolls 1/3. How much flour is need to make 1 diner roll

Answers

you will need 1/15 to make a dinner role

x square plus 3x minus 18 equal 0 by using quadratic formula

Answers

Answer:


Step-by-step explanation:

x^2 + 3x - 18 = 0

(x+6)(x-3)=0

x=-6 x=3

i had this on my book so i just wanted to help.





Final answer:

The quadratic equation x^2 + 3x - 18 = 0 can be solved using the quadratic formula, resulting in two solutions, x = 3 and x = -6.

Explanation:

To solve the quadratic equation x^2 + 3x - 18 = 0 using the quadratic formula, we must first identify the coefficients a, b, and c in the standard form ax2 + bx + c = 0. In our equation, a = 1, b = 3, and c = -18. Substituting these values into the quadratic formula gives us:

x = [-b ± √(b^2 - 4ac)] / (2a)

By substituting the values we have:

x = [-(3) ± √((3)^2 - 4(1)(-18))] / (2(1))

Which simplifies to:

x = [-3 ± √(9 + 72)] / 2

x = [-3 ± √(81)] / 2

x = [-3 ± 9] / 2

Therefore, we have two possible solutions for x:

x = (-3 + 9) / 2 = 3

x = (-3 - 9) / 2 = -6

So, the solutions to the equation x2 + 3x - 18 = 0 are x = 3 and x = -6.

State whether each question below represents a proportional relationship. How can you tell?

a. y= x+ 2.3

b. y=6\13x

c. 7-y=2x

Answers

B and C’s equation has the form y=mx+b, where b=0. So, B and C represent a proportional relationship.
Final answer:

Among the given equations, only 'y = 6/13x' shows a proportional relationship because the ratio between x and y remains constant. The other two equations-'y = x + 2.3' and '7 - y = 2x' are not showing proportional relationships because the ratio between the variables doesn't remain constant.

Explanation:

A proportional relationship is one where the ratio between two variables remains constant. This relationship can be represented by the equation y = kx, where k is the constant of proportionality.

a) The equation y = x + 2.3 is not a proportional relationship because it involves an added constant. If x is zero, y is not zero, thus it's not proportional.

b) The equation y = 6/13x is a proportional relationship, because there is a direct proportion between x and y. If x is multiplied by a certain factor, y will be multiplied by the same factor, thus maintaining the ratio.

c) The equation 7 - y = 2x rearranges to y = 7 - 2x, which is not a proportional relationship. Again, if x is zero, y is not zero, thus it's not proportional.

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Y=-4x y=x^2-12 solve the system of equations

Answers

Answer:

(-6, 24) and (2, -8)

(-6, 24) and (2, -8) is the answer.

What's the easiest way to remedy a system of equations?

There are three strategies used to resolve structures of equations: graphing, substitution, and elimination. To solve a gadget via graphing, you honestly graph the given equations and locate the factor(s) in which they all intersect. The coordinate of this point will provide you with the values of the variables that you are fixing.

How do you remedy a gadget of equations without graphing?

To remedy a machine of linear equations without graphing, you may use the substitution technique. This method works by way of solving one of the linear equations for one of the variables, then substituting this price for the same variable in the different linear equation and solving for the other variable.

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Making sure I’m doing this write... please give a walkthrough explanation! :)

144= -12(x+5)

(I’m solving for x)

Answers

Start by distributing:

-12(x+5) = (-12 * x) + (-12 * 5) = -12x - 60

144 = -12x - 60


Add 60 to both sides to start isolating your variable:

204 = -12x


Solve for x by dividing both sides by -12:

x = -17

Step-by-step explanation:

multiply -12 with x and 5, after you get the answer. subtract 60 on the left and right, after getting 84 divide it by -12 and the final answer will be -7


Triangle ABC is dilated by a scale factor of 4 to form triangle A′B′C′.

The coordinates of vertex A′ are?

The coordinates of vertex B′ are?

The coordinates of vertex C′ are?

Answers

vertex A' (-8,4)
vertex B' (-12,12)
vertex C' (-4,12)

Answer:

The correct answers would be

vertex A' (-8,4)

vertex B' (-12,12)

vertex C' (-4,12)

Step-by-step explanation:

I'm not 100% sure but I took this test a couple days ago and didn't do terribly:).

PLZ HELP URGENT 30 POINTS!!!!!


Which of the following
functions maps 3 to -5

F(x)=4-x^2
F(x)=x-5
F(x)=-x+2
F(x)=x+8

Answers

Answer:

F(x)=4-x^2

Step-by-step explanation:


I am assuming that x=3 and y=-5

Put in x =3

F(3)=4-3^2 = 4-9  =-5    Yes

F(3)=3-5   = -2  No

F(3)=-3+2 = -1  No  

F(3)=3+8=11  No

y = 15x
y = 25 + 12.5x

Answers

Substitute y = 15x to the equation y = 25 + 12.5x:

15x = 25 + 12.5x     subtract 12.5x from both sides

2.5x = 25    divide both sides by 2.5

x = 10

Substitute the value of x to the equation y = 15x:

y = (15)(10)

y = 150

Answer: x = 10 and y = 150

Which equations contain the point (0.5, –6.75). Check all that apply.
2x + 4y = –26
y = x – 7.5
2y = x + 13
y = 0.5x – 7

Answers

Answer:

(A) 2x + 4y = –26

(D) y = 0.5x – 7

The equations satisfying the points  (0.5, –6.75) will be  2x + 4y = –26 and y = 0.5x – 7. The correct options are A and D.

What is an expression?

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

The given point is (0.5, –6.75). Check whether all the equations satisfy the point or not.

A) 2x + 4y = –26

2 x 0.5 + 4 x -6.75 = -26

1 - 27 = -26

-26 = -26

Satisfying

B) y = x – 7.5

-6.75 = 0.5 - 7.5

-6.75 ≠ -7

C) 2y = x + 13

2 x -6.75 = 0.5 + 13

-13.5 ≠ 13.5

y = 0.5x – 7

-6.75 = 0.5 x 0.5 -7

-6.75 = -6.

Satisfying.

Therefore, the equations satisfying the points  (0.5, –6.75) will be  2x + 4y = –26 and y = 0.5x – 7. The correct options are A and D.

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4,839 sq. yd. 8 sq. ft.139 sq. in.+ 7 sq. ft. 124 sq. in

Answers

The Mathematics problem involves adding areas in different units and converting them appropriately. After conversion and addition, the correct answer from the options provided is 1 acre, 7 square feet, and 119 square inches: (a) 1a 7 sqft 119 sqin.

The subject of this question is Mathematics, specifically dealing with area measurements in different units and their conversions. The student needs to solve an addition problem that involves square yards, square feet, and square inches. To solve this problem, we must first understand that there are 9 square feet in one square yard, and we use this knowledge to convert all measurements to the same unit before summing them up.

To answer the student's question, we must add the areas given in the problem:

4,839 sq yd 8 sq ft 139 sq in7 sq ft 124 sq in

First, we convert square yards to square feet using the conversion 1 sq yd = 9 sq ft:

4,839 sq yd = 4,839 × 9 sq ft = 43,551 sq ft

Now we add the square feet:

43,551 sq ft + 8 sq ft + 7 sq ft = 43,566 sq ft

Lastly, we add the square inches:

139 sq in + 124 sq in = 263 sq in

Since there are 144 square inches in one square foot, we must convert the excess square inches into square feet and square inches:

263 sq in = 1 sq ft (144 sq in) + 119 sq in

Adding the converted square inches to the total square feet:

43,566 sq ft + 1 sq ft = 43,567 sq ft 119 sq in

Next, we convert the total square feet to acres, understanding that 1 acre = 4,840 sq yd or approximately = 43,560 sq ft.

43,567 sq ft ÷ 43,560 sq ft per acre ≈ 1 acre 7 sq ft 119 sq in

Thus, the correct answer is (a) 1a 7 sqft 119 sqin.

Complete question is here:

Solve the following problem 4,839 sq yd 8 sq ft 139 sq in + 7 sq ft 124 sq in Select one of four

a)1a 7 sqft 119 sqin

b)4a 10 sqft 145 sqin

c)3a B sqft 130 sqin

d)2a 9 sqft 150 sqin

Final answer:

The question asks for the addition of different area units, which requires unit conversion. Square yards are converted to square feet and then to square inches, ensuring all areas are in the same units before adding them together.

Explanation:

The question involves adding areas measured in different units (square yards, square feet, and square inches) and converting between these units. To perform the calculation correctly, we need to convert all areas to the same unit. One square yard is equivalent to 9 square feet, and one square foot is equivalent to 144 square inches. Thus, to add the areas given in the question, we should first convert the 8 sq. ft. 139 sq. in. to sq. in. by multiplying 8 by 144 and then adding 139. After that, we would need to convert this total area into square yards if required. For the second part, we convert 7 sq. ft. 124 sq. in. to square inches similarly. Once both areas are in square inches, they can be added together. Additionally, it's important to remember that there is no direct conversion between square inches and square yards, so a two-step conversion is needed via square feet.

Which question shows the quadratic fomula used correctly to solve 7x^2=9+x for x

Answers

Answer:

x = [tex]\frac{-b\pm\sqrt{b^{2}-4ac} }{2a}[/tex]

Step-by-step explanation:

We have

7x²=9+x

Subtracting x from both sides, we get

7x²-x=9+x-x

Cancelling out +x and -x from the right side, we get

7x²-x=9

Subtracting 9 from both sides, we get

7x²-x-9=9-9

Cancelling out 9 and -9 from the right side, we have

7x²-x-9 = 0

The above equation is in the form ax²+bx+c=0 where upon comparing we get a= 7 , b = -1 and c= -9

We can solve for x using the below quadratic formula:-

x = [tex]\frac{-b\pm\sqrt{b^{2}-4ac} }{2a}[/tex]

Upon solving we'll get two values for x, one positive an the other negative.

A construction worker has a rope that is 6 m long. She needs to cut it into pieces that are each 3/7 m long. How many such pieces can she cut without having any rope​ leftover?

Answers

Answer:

14 pieces

Step-by-step explanation:

We will divide 6 m into 3/7 m pieces

6 ÷ 3/7

Use copy dot flip

6 * 7/3 =

42/3

14

She will have 14 pieces

50 POINTS PLEASE HELP FAST DUE TODAY: Explain why any of the four operations (+ - × ÷) placed between the two terms 5 and -3√8 will result in an irrational number.

Answers

Answer:

Because -3-/8 itself is an irrational number. No matter the operation it wil always be irrational

Step-by-step explanation:


the school fit 72 students onto 3 buses. find the unit rate for number of students per bus.

Answers

the unit rate would be 24 because the unit rate is x divided by the y so 72÷3
That would be 24 cause 72 divided by 3 =24

Solve for x and y
3x+y=6
x+y=2

Answers

3x+y=6

x+y=2

rewrite x + y = 2 as y = 2-x

Replace Y in the first equation with the re-written equation:


3x + 2-x = 6

Solve for x:

3x + 2-x = 6

subtract x:

2x +2 = 6

Subtract 2 from each side:

2x = 4

Divide both sides by 2:

x = 2


Now you have x, replace x with 2 in the second equation and solve for y:

x + y = 2

2 + y = 2

Subtract y 2 from each side:

y = 0


The answer is: X = 2, Y = 0

REBECA HAD 9/10 OF A YARDOF RIBBON. THEN SHE GAVE 7/20 OF A YARD OF FRIEND. HOW MUCH DOES SHE HAVE LEFT?

Answers

Answer:

She has 11/20 yds left

Step-by-step explanation:

We take what she had and subtract what she gave away

9/10 - 7/20

We need to get a common denominator of 20

9/10 *2/2 - 7/20

18/20 - 7/20

11/20

She has 11/20 yds left

Other Questions
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