The list shows the final exam grades for Ms. Gold's math class. Make a stem-and-leaf plot for the data.
66,98,92,91,69,55,53,90,67,74,57,58,60,59,86,92,63,55,51,84​

Answer:

Yes, the right angle is angle B

Step-by-step explanation:

we have

[tex]A(-2, 3), B(-3,-6),C(2,-1)[/tex]

Plot the vertices

see the attached figure

we know that

If triangle ABC is a right triangle

then

Applying the Pythagoras Theorem

[tex]AB^{2} =AC^{2}+BC^{2}[/tex]

the formula to calculate the distance between two points is equal to

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

Find the distance AB

[tex]A(-2, 3), B(-3,-6)[/tex]

substitute in the formula

[tex]d=\sqrt{(-6-3)^{2}+(-3+2)^{2}}[/tex]

[tex]d=\sqrt{(-9)^{2}+(-1)^{2}}[/tex]

[tex]AB=\sqrt{82}\ units[/tex]

Find the distance BC

[tex]B(-3,-6),C(2,-1)[/tex]

substitute in the formula

[tex]d=\sqrt{(-1+6)^{2}+(2+3)^{2}}[/tex]

[tex]d=\sqrt{(5)^{2}+(5)^{2}}[/tex]

[tex]BC=\sqrt{50}\ units[/tex]

Find the distance AC

[tex]A(-2, 3),C(2,-1)[/tex]

substitute in the formula

[tex]d=\sqrt{(-1-3)^{2}+(2+2)^{2}}[/tex]

[tex]d=\sqrt{(-4)^{2}+(4)^{2}}[/tex]

[tex]AC=\sqrt{32}\ units[/tex]

Verify the Pythagoras theorem

[tex](\sqrt{82})^{2} =(\sqrt{32})^{2}+(\sqrt{50})^{2}[/tex]

[tex]82=82[/tex] ---> is true

therefore

Is a right triangle and the right angle is B

Answer:

9/32

Step-by-step explanation:

BC = black circle

BS = black square

WC = white circle

WS = white square

Given:

(WC + WS) / (BC + BS) = 5 / 11

WC / WS = 3 / 7

BC / BS = 3 / 8

Find: (BC + WC) / (BC + BS + WC + WS)

Solve for WC and BC in the last two equations, then substitute into the first:

WC = 3/7 WS

BC = 3/8 BS

WC + WS = 5/11 (BC + BS)

3/7 WS + WS = 5/11 (3/8 BS + BS)

10/7 WS = 5/8 BS

WS = 7/16 BS

Therefore:

WC = 3/7 WS

WC = 3/16 BS

Substitute:

(BC + WC) / (BC + BS + WC + WS)

(3/8 BS + 3/16 BS) / (3/8 BS + BS + 3/16 BS + 7/16 BS)

(9/16 BS) / (2 BS)

9/32

Answer:

[tex]\large\boxed{3\div\dfrac{1}{5}}[/tex]

Step-by-step explanation:

Each 1 was divided into five equal parts. Each of these parts is 1/5. We calculate how many times 1/5 is in 3.

Answer: Answer is below

Step-by-step explanation: The answer is that the opposite of a cosine is called a hypotenuse. The ratio of the triangle is called a tangent.

I hope this info helps! :V

Answer:

N/A

Step-by-step explanation:

Which area of shaded segment?

Answer:

Area Of Shaded Segment =

In Pictures

Answer:

What triangle below?

Step-by-step explanation:

Im confused sorry

Answer:

y = -4x - 6

Step-by-step explanation:

The equation of a line in point-slope form.

[tex] y - y_1 = m(x - x_1) [/tex]

is the equation of the line containing point (x1, y1) and having slope, m.

The given point of the perpendicular bisector is (-1, -2), so in this case, x1 = -1, and y1 = -2.

We need the slope of the perpendicular bisector. First we find the slope of the segment. We start at point (-5, -3). We go up 1 unit and 4 units to the right, and we are at another point on the segment. Since slope = rise/run, the slope of the segment is 1/4. The slopes of perpendicular lines are negative reciprocals, so the slope of the perpendicular bisector is the negative reciprocal of 1/4, so for the perpendicular bisector, m = -4.

Now we use the equation above and our values.

[tex] y - y_1 = m(x - x_1) [/tex]

[tex] y - (-2) = -4(x - (-1)) [/tex]

[tex] y + 2 = -4(x + 1) [/tex]

[tex] y + 2 = -4x - 4 [/tex]

[tex] y = -4x - 6 [/tex]

Answer:

Step-by-step explanation:

y = -4x - 6

Equations are used to represent the relationships between variables. In [tex]y=x^2 -1[/tex], the variables are x & y and the following observations are true for the given equation:

Given that:

[tex]y=x^2 -1[/tex]

[tex]x^2 \to[/tex] the square of x

So, means that: the y is 1 less than the square of x

From the attached table, we have:

[tex]x = -2; y = a[/tex]

This means that:

[tex]a = (-2)^2 - 1[/tex]

[tex]a = 4 - 1[/tex]

[tex]a =3[/tex]

Also, we have:

[tex]x = b; y = -1[/tex]

This means that:

[tex]-1 = b^2 - 1[/tex]

Collect like terms

[tex]b^2 =1-1[/tex]

[tex]b^2 =0[/tex]

Take square roots

[tex]b = 0[/tex]

Hence, the values of a and b are 3 and 0, respectively.

The graph options are not made available. So, I will plot the graph of [tex]y=x^2 -1[/tex].

See attachment for graph of [tex]y=x^2 -1[/tex]

Read more about graphs and equations at:

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Answer: In short for ed2020 :

1. 3rd answer

Graph: A

Table: A=3 B=0

Answer:

2

Step-by-step explanation:

The reason 2 is the Greatest Common Factor of 6 and 8 is because 2 is the only number (other than 1) that you can divide evenly by both numbers  without making a fraction. 6/2= 3 and 8/2= 4.

Answer:

Step-by-step explanation:

In general, factor the numbers given into their primes.

6: 2*3

8: 2 * 2 * 2

Take the most you can from the two numbers primes. In this case it is 2.

A slightly more interesting problem is the GCF of 12 and 18

12: 2 * 2 * 3

18: 2 * 3 * 3

Here the two numbers that are common to both factored numbers is 2 and 3

GCF = 2*3

GCF = 6

Answer:

One of the numbers is 5

The other number is 17

Step-by-step explanation:

You could do this just by guessing numbers. But I think you are intended to do it with algebra.

x + y = 22

y = 2*x + 7          Substitute the y value in this equation into the first equation

x + 2x + 7 = 22   Combine the xs on the left.

3x + 7 = 22          Subtract 7 from both sides.

3x+7-7=22- 7       Combine

3x = 15                 Divide by 3

3x/3 = 15/3           Combine

x = 5

x + y = 22             Substitute 5 for x

5 + y = 22            Subtract 5 from both sides.

5-5+y = 22-5

y = 17

Answer:

17 or 5

Step-by-step explanation:

I took the test

Answer:

y=2x-10

Step-by-step explanation:

First step: Let's compute the slope. You can directly use the formula for slope given two points here but I just like to like them up and subtract vertically. Make sure you put 2nd difference on top of 1st difference (yes, like a fraction).

(7  ,  4)

-(4 ,  -2)

=======

3       6

So the slope is 6/3 =2.

So we know our line is in the form y=2x+b.

We have to find the y-intercept now.  To find b we will use a point that we know is on the line (you know two-just choose one of them) .  I will plug in (4,-2) giving me this equation -2=2(4)+b

       Solving:                              -2=8+b

                                      So            b=-10

The answer is y=2x-10

Answer:

7y

Step-by-step explanation:

By cross multiplication

[tex] \frac{x}{7} = \frac{y}{5} \\ 5x = 7y[/tex]

Answer:

[tex]5x=7y[/tex]

Step-by-step explanation:

We have the following relationship

[tex]\frac{x}{7}=\frac{y}{5}[/tex]

Based on the relationship between the variables X and Y that we know, we must find out what the expression "5x" is in terms of the variable y.

Then we solve the equation for x

[tex]x=\frac{7y}{5}[/tex]

Now multiply by 5 both sides of equality

[tex]5x=\frac{5*7y}{5}[/tex]

[tex]5x=7y[/tex]

Finally we have that 5x equals 7y

Step-by-step explanation:

10.44 is correct as we have to add both dis and divide by both hrs

In this case, Taylor's average rate is 10 miles per hour.

To calculate Taylor's average rate during her trip, we can use the formula for average speed:

Calculate the total distance traveled: 62 miles - 32 miles = 30 miles.

Calculate the total time taken: 6 hours - 3 hours = 3 hours.

Divide the total distance by the total time to find the average speed: 30 miles / 3 hours = 10 miles per hour.

Answer:

x=1, y=-5

Step-by-step explanation:

Given equations are:

[tex]3x+10y=-47\ Eqn\ 1\\and\\5x-7y=40\ Eqn\ 2[/tex]

In order to solve the equation

Multiplying Eqn 1 by 5 and eqn 2 by 3 and subtracting them

So,

Eqn 1 becomes

15x+50y=-235

Eqn 2 becomes

15x-21y=120

Subtracting 2 from a

15x+50y - (15x-21y) = -235-120

15x+50y-15x + 21y = -355

71y = -355

y = -355/71

y =-5

Putting y= -5 in eqn 1

3x+10(-5) = -47

3x -50 = -47

3x = -47+50

3x = 3

x = 3/3

x = 1

Hence the solution is:

x=1, y=-5

Answer: x=1; y=-5

Step-by-step explanation: To solve this system we can use differente methods, in this case we are going to use substitution:

first equation: 3x+10y=-47

second equation: 5x-7y=40

we are going to isolate x from the first equation:

3x=-47-10y

[tex]x=\frac{-47-10y}{3}[/tex]

now we replace it in the second equation:

[tex]5*\frac{-47-10y}{3}-7y=40[/tex]

and now we solve for y:

[tex]\frac{-235-50y}{3} -7y=40[/tex]

[tex]\frac{-235-50y-21y}{3}=40[/tex]

[tex]-235-71y=40*3[/tex]

[tex]-235-71y=120[/tex]

[tex]-71y=120+235[/tex]

[tex]y=-355/71[/tex]

y=-5

now we replace the value of y in the first equation and solve for x:

[tex]x=\frac{-47-10y}{3}[/tex]

[tex]x=\frac{-47-10(-5)}{3}[/tex]

[tex]x=\frac{-47+50}{3}[/tex]

[tex]x=\frac{3}{3}[/tex]

x=1

Answer:

y=6

Step-by-step explanation:

y = -x+7

We have the point (1,y)

That means x=1 and we want to find y

Let x=1

y = -1+7

y = 6

The point is (1,6)  where x=1 and y =6

Answer:

1,3,5,15

Step-by-step explanation:

these are the factors of 15

Answer:

Step-by-step explanation:

I must assume that you meant, "the sum of which four numbers equals 15?"

15 = 6 + 9

    = 3 + 3 + 9

    =  3 + 3 + 3 + 6

All of these sets (on the right side) add up to 15.  There are four numbers in the last set.

Answer:

Perimeter of the square  = 8x - 4 in

Step-by-step explanation:

Perimeter of the square = 4 * side

                                        = 4 * (2x - 1)

                                        = 8x - 4 in

f(x) and y are two different ways of denoting the same thing. Thus...

f(x) = 9x - 8 is the same as y = 9x - 8

Inverse: the inverse of a function is the resulting equation when x and y switch places and the equation is solved for x

Switch the places of x and y in the given equation:

y = 9x - 8 ---> x = 9y - 8

Solve the new equation for y (isolate y on the left side of the equation)

x = 9y - 8

x + 8 = 9y - 8 + 8

x + 8 = 9y

(x + 8) / 9 = 9y / 9

(x + 8)/9 = y

y = (x + 8) / 9

y = [tex]\frac{x+8}{9}[/tex]

Now you have the inverse of f(x) = 9x - 8:

A) [tex]f^{-1}[/tex] =[tex]\frac{x + 8}{9}[/tex]

inverse

Answer:

A. [tex]f^{-1}(x)=\frac{x+8}{9}[/tex]

Step-by-step explanation:

We have been given a function [tex]f(x)=9x-8[/tex]. We are asked to find the inverse function for our given function.

First of all, we will rewrite [tex]f(x)[/tex] as [tex]y[/tex] as:

[tex]y=9x-8[/tex]

To find the inverse function, we will interchange x and y variables and then solve for y.

[tex]x=9y-8[/tex]

Now, we will add 8 on both sides of our given equation.

[tex]x+8=9y-8+8[/tex]

[tex]x+8=9y[/tex]

Switch sides:

[tex]9y=x+8[/tex]

Now, we will divide both sides of our equation by 9.

[tex]\frac{9y}{9}=\frac{x+8}{9}[/tex]

[tex]y=\frac{x+8}{9}[/tex]

Now, we will replace [tex]y[/tex] with [tex]f^{-1}(x)[/tex] as:

[tex]f^{-1}(x)=\frac{x+8}{9}[/tex]

Therefore, the inverse function for our given function would be [tex]f^{-1}(x)=\frac{x+8}{9}[/tex] and option A is the correct choice.

Answer:

0.

Step-by-step explanation:

If log(a) x = b

Then by the definition of a logarithm x = a^b.

So let log(4) 1 = y

then 1 = 4^y

but 4^0 = 1

so y = log(4) 1 = 0.

Answer:

1. x=4 or x=10

2.  x=-10 or x=10

No equivalent

Step-by-step explanation:

1. |x-3|=7 and x-3=7

Absoulte rules.

x-3=-7 and x-3=7

Add 3 both sides.

x-3+3=-7+3

Simplify.

-7+3=-4

x=-4

x-3=7

Add by 3 both sides.

x-3+3=7+3=10

x=10

X=-4, and X=10 is the correct answer.

________________________________

2. |x|-3=7

Add by 3 both sides.

|x|-3+3=7+3

Simplify.

7+3=10

X=10

X=-10 and X=10 is the correct answer.

______________________________

The two equations |x-3|=7 and |x|-3=7, are solved differently. For |x-3|=7, the possible solutions are x=10 and x=-4. For |x|-3=7, the possible solutions are x=10 and x=-10.

The two equations you're looking at are: |x-3|=7 and |x|-3=7. They look very similar but they're solved differently because absolute value symbols affect all values inside them together.

For the first equation, |x-3|=7, we solve this by considering the two situations, x-3 = 7 and x-3 = -7. Solve each of these two equations separately, so you get x = 10 and x = -4.

For the second equation, |x|-3=7, firstly, we need to eliminate '-3' from the right-hand side by adding 3 to both sides, leading to |x| = 10. This is then broken down into the two possible situations as before: x = 10 and x = -10.

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Answer: c

Step-by-step explanation:

Answer:

Slope = 5

y-intercept = (0, 5)

x-intercept = (-2.5, 0)

Independent variable = x

Dependent variable = y

Domain = Any real #

Range = I believe it's any real #

Step-by-step explanation:

The slope of the equation is 2.

The y-intercept is 5.

The x-intercept is -5/2.

The independent variable is x.

The dependent variable is y.

The domain of the equation is any real number.

The range of the equation is any real number.

The graph of the linear equation y = mx + c is a line with m as slope, and m and c as the y-intercept.

The equation in slope-intercept form is;

y = 2x + 5

1. The slope of the equation is;

y = mx + c

y = 2x + 5

On comparing m = 2

The slope of the equation is 2.

2. The y-intercept is;

y = mx + c

y = 2x + 5

On comparing c = 5

The y-intercept is 5.

3. The x-intercept is;

y = 0

y = 2x + 5

0 = 2x +5

2x = -5

x = -5/2

The x-intercept is -5/2.

4. The independent variable is x.

5. The dependent variable is y.

6. The domain of the equation is any real number.

7. The range of the equation is any real number.

Learn more about slopes here;

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Answer:

20 mg / hour

Step-by-step explanation:

The first step is to find the mg/mL of dopamine.

If there are 52 mg / 26 mL, then there are 2 mg / 1 mL (just reduce the fraction).

If we are losing 10 mL / 1 hour, and there are 2 mg / mL, then the flow rate of dopamine mg / hour is 20.

You can also do this using dimensional analysis.

[tex]\frac{52 mg}{26 mL} (\frac{10 mL}{1 hour})[/tex]

Just cross out the units that cancel in the numerator and denominator (mL in this case), and you're left with mg / hour. Then multiply the numerators and divide by the denominators. You get the same answer.

The first step is to find the mg/mL of dopamine.

If there are 52 mg / 26 mL, then there are 2 mg / 1 mL (just reduce the fraction).

If we are losing 10 mL / 1 hour, and there are 2 mg / mL, then the flow rate of dopamine mg / hour is 20.

You can also do this using dimensional analysis.

[tex]\frac{52 mg}{26 mL} (\frac{10 mL}{1 hour})[/tex]

Just cross out the units that cancel in the numerator and denominator (mL in this case), and you're left with mg / hour. Then multiply the numerators and divide by the denominators. You get the same answer.

Answer:

The answer in the procedure

Step-by-step explanation:

we have

[tex]\frac{1}{3}x^{2} +2[/tex]

This is a vertical parabola open upward with the the vertex at (0,2)

The vertex is a minimum

The y-intercept is the point (0,2) (value of y when the value of x is equal to zero)

The graph does not have x-intercepts, therefore the solutions of the quadratic equation are complex number

using a graphing tool

see the attached figure

Answer:

she owes nothing and the credit card company owes her nothing.

Answer:

It represents that the bank owes her nothing and she doesn't owe the bank anything. So it is neither postive or negative

Step-by-step explanation:

Answer: 95°

Step-by-step explanation: We are given information for Angles 1 and 4, which happen to be vertical angles, meaning they are congruent. Because of this, we can say 3x+10=4x-15, therefore x=25. Angles 1,2,3 and 4 must add up to 360°, and since we know angles 1 and 4 are 85° (3*25 + 10 = 85), we can find angles 2 and 3. 360° - 85° - 85° = Angle 2 + Angle 3. Angle 2 + Angle 3 = 190, and because Angles 2 and 3 are vertical angles and therefore congruent, we can divide 190 by 2 and get that Angles 2 and 3 equal 95°. Because lines b and c are parallel, any corresponding angles created by a transversal are congruent. This basically means Angles 3 and 7 must be congruent, therefore Angle 7 = 95°

Congruent - same meaning as equal

Vertical Angles - each of the pairs of opposite angles made by two intersecting lines.

Answer:

∠2 and ∠5

Step-by-step explanation:

we know that

Alternate Exterior Angles are a pair of angles on the outer side of each of those two lines but on opposite sides of the transversal

In this problem

∠12 and ∠2 are alternate exterior angles

∠12 and ∠5 are alternate exterior angles

therefore

∠2 and ∠5 are each separately alternate exterior angles with ∠12

ANSWER

Prime

EXPLANATION

The given quadratic expression is

[tex] {2t}^{2} - 19 - 6t[/tex]

We rewrite in standard form to obtain

[tex]{2t}^{2} - 6t - 19[/tex]

Comparing to the standard quadratic function in t,

[tex]a {t}^{2} + bt + c[/tex]

We have

[tex]a = 2[/tex]

[tex]b = - 6[/tex]

[tex]c = - 19[/tex]

We find that the product

[tex]ac = 2 \times - 19 = - 38[/tex]

There are no two factors of -38 that sums up to -6.

This means that, the given polynomial does not have rational factors.

Therefore the polynomial is prime.

The perimeter is 11 inches.

One side is 2 inches shorter, so two sides would be 4 inches shorter total.

Subtract 4 from 11 to get 7 inches.

Divide 7 by 4 ( the number of sides):

7 / 4 = 1.75

The shorter side is 1.75 inches.

Now add 2 inches to that for the longer side:

1.75 + 2 = 3.75 inches.

Check: 3.75 + 3.75 + 1.75 + 1.75 = 11

The longer side is 3.75 inches.

Answer:

{-2,-1,0}

Step-by-step explanation:

The domain of a function is defined as the set of x values for which the function is real and defined. The x values represent independent or predictor variable.

The domain of the function is thus;

{-2,-1,0}

These are basically the x values of the function