Write a proportion to find how many points x a student needs to score on a test worth 50 points to get a test score of 40%.

The answer is:

The correct option is the first option, the average speed in blocks per minute is 1.5 blocks per minute.

[tex]AverageSpeed=1.5\frac{Block}{minute}[/tex]

To calculate the average speed we need to calculate the total distance traveled and the total time taken to cover that distance.

From the statement we know that:

[tex]Distance_{1}=3blocks\\Distance_{2}=9blocks-3blocks=6blocks\\time_{1}=2minutes\\time_{2}=6minutes[/tex]

So, we need to use the following formula in order to calculate the average speed:

[tex]AverageSpeed=\frac{distance_{1}+distance_{2}}{t_{1}+t_{2}}[/tex]

Then, substituting we have:

[tex]AverageSpeed=\frac{3blocks+9blocks}{2minutes+6minutes}[/tex]

[tex]AverageSpeed=\frac{12blocks}{8minutes}=1.5\frac{blocks}{minutes}[/tex]

Hence, we have that the correct option is the first option, the average speed in blocks per minute is 1.5 blocks per minute.

[tex]AverageSpeed=1.5\frac{Block}{minute}[/tex]

Have a nice day!

Answer:

Part 1) [tex]m=0[/tex]

Part 2) The slope is undefined

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

Part 1

we have

[tex]A(-2,-5)\ B(8,-5)[/tex]

Substitute the values

[tex]m=\frac{-5+5}{8+2}[/tex]

[tex]m=\frac{0}{10}[/tex]

[tex]m=0[/tex]  ----> is a horizontal line (parallel to x-axis)

Part 2

we have

[tex]A(4,9)\ B(4,-7)[/tex]

Substitute the values

[tex]m=\frac{-7-9}{4-4}[/tex]

[tex]m=\frac{-16}{0}[/tex]   ----> is a vertical line (parallel to y-axis)

The slope is undefined

Answer:

Step-by-step explanation:

sqrt(28): sqrt(4*7)

sqrt(4) = 2;

sqrt28)=2*sqrt(7)

sqrt(343): sqrt(7 * 7 * 7) = 7 * sqrt(7)

Note: the rule is if you have 3 equal primes under the root sign, you leave one, you throw one away, and you put one outside the root sign.

2 sqrt(63) = 2 sqrt(3*3*7)  The above rule gets modified to throw 1 three away and take the other one outside the root sign.

2sqrt(63) = 2*3 sqrt(7)

Numerator: 2*sqrt(7) + 7sqrt(7) = 9sqrt(7)

9sqrt(7)

======

6 sqrt(7)

3/2

Note without brackets I cannot be certain that I have interpreted this correctly. The division only apply to sqrt(343) / 2 sqrt(63). If this is so please leave a note.

whenever we have an amount to be divided in ratios, we simply divide the total amount by the sum of those ratios and then distribute accordingly.  In this case, let's divide 77.40 by (1+3+5) and then distribute accordingly to each chap.

[tex]\bf \stackrel{Paul}{1}~~:~~\stackrel{Colin}{3}~~:~~\stackrel{Brian}{5}~\hfill \cfrac{77.40}{1+3+5}\implies 8.6 \\\\\\ \stackrel{Paul}{1\cdot 8.6}~~:~~\stackrel{Colin}{3\cdot 8.6}~~:~~\stackrel{Brian}{5\cdot 8.6}\qquad \implies \qquad \stackrel{Paul}{8.6}~~:~~\stackrel{Colin}{25.8}~~:~~\stackrel{Brian}{43} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{\textit{Brian get this much more than Paul}}{43-8.6\implies 34.4}~\hfill[/tex]

Answer:

£34.40

Step-by-step explanation:

Paul, Colin and Brian are waiters.

One night the restaurant earns tips totalling £77.40

They share the tips in the ratio 1:3:5

Paul gets [tex]\frac{1}{9}[/tex] × £77.40 = £8.60

Brian gets [tex]\frac{5}{9}[/tex] × £77.40 = £43.00

Brian gets £43.00 - £8.60 = £34.40 more than Paul.

Answer:

y = -4x + 15

Step-by-step explanation:

Slope-intercept form is y = mx + b

m = slope ([tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex])

b = y-intercept (where the line crosses the y-axis)

It doesn't matter which coordinate pair you use for (x₁,y₁).

(x₁,y₁) = (2,7)

(x₂,y₂) = (4,-1)

[tex]\frac{-1 - 7}{4 - 2}[/tex]   Simplify

[tex]\frac{-8}{2}[/tex]   Simplify

-4 = your slope (m)

To get this information into slope-intercept form, you have to plug it into point-slope form, y - y₁ = m(x - x₁). It doesn't matter which coordinate pair you use for (x₁,y₁).

y - y₁ = m(x - x₁)   Let's use (2,7) since it doesn't have negatives.

y - 7 = -4 (x - 2)   Distribute

y - 7 = -4x + 8   Add 7 to both sides

y = -4x + 15

Check your answer by plugging both coordinate pairs in.

y = -4x + 15

7 = -4(2) + 15

7 = -8 + 15

7 = 7

and

-1 = -4(4) + 15

-1 = -16 + 15

-1 = -1

Answer:

y = -4x + 15

Step-by-step explanation:

m = -y₁ + y₂\-x₁ + x₂

Find the Rate of change [Slope] using the above formula:

-7 - 1\-2 + 4 = -4

Next, we use the Point-Slope Formula [y - y₁ = m(x - x₁)] to convert to Slope-Intercept Formula [y = mx + b]:

y + 1 = -4[x - 4]

y + 1 = -4x + 16

- 1 - 1

________________

[tex]y = - 4x + 15[/tex]

I am joyous to assist you anytime.

Answer:

It is known that 1 pint equals 16 ounces

Step-by-step explanation:

It is known that 1 pint equals 16 ounces. Then we use this data to transform a number of ounces into pints.

Suppose we have x ounces. We want to know how many pints are these x ounces. Then we perform the following operation

[tex]x\ ounces*\frac{1\ pint}{16\ ounces}=z\ pints[/tex]

Where z pints is the amount equivalent to x ounces

Answer:

No Solution

Step-by-step explanation:

Substitution means to replace the variable with the one provided, in this problem we have been given y = 2x, so we would simply replace the y variable in the second equation with 2x.

Review over what we have been given

y = 2x

-6x + 3y = 16

As explained above, substitute the y value in the second equation with the contents of the first equation.

-6x + 3(2x) = 16

In this step, you can solve for the value of x.

-6x + 6x = 16

Since both of the x variables cancel out, we cannot find the value of x since it equals to zero, which also means we cannot find the value of y.

0 = 16

Generally, we find the value of our x, then we would input that into the first equation to find the value of y.

But as stated above, there is no value of x, therefore there is no solution.

Answer:

The amount of money that Alex has is $47.4

Step-by-step explanation:

Let

x----> amount of money that Alex has

y----> amount of money that Jennifer has

z----> amount of money that Jennifer Shannon has

we know that

x+y+z=91 ----> equation A

x=3y -----> equation B

y=z-12 -----> z=y+12 -----> equation C

substitute equation B and equation C in equation A and solve for y

(3y)+y+(y+12)=91

5y=91-12

y=79/5

y=$15.8

Find the value of x

x=3y ----> x=3(15.8)=$47.4

Answer:

6n

Step-by-step explanation:

Lesson:  ⇒ Algebric Expression

Product: ⇒ multiply

6n is the correct answer.

I hope this helps you, and have a wonderful day!

For this case we must find an expression equivalent to:

[tex](x ^ {\frac {4} {3}} * x ^ {\frac {2} {3}}) ^ {\frac {1} {3}}[/tex]

By definition of power properties we have to:

[tex](a ^ n) ^ m = a ^ {n * m}[/tex]

So, rewriting the expression we have:

[tex]x ^ {\frac {4} {3 * 3}} * x ^ {\frac {2} {3 * 3}} =[/tex]

[tex]x ^ {\frac {4} {9}} * x ^ {\frac {2} {9}} =[/tex]

By definition of multiplication of powers of the same base, we put the same base and add the exponents:

[tex]x ^ {\frac {4} {9} + \frac {2} {9}} =\\x ^ {\frac {4 + 2} {9}} =\\x ^ {\frac {6} {9}} =\\x ^ {\frac {2} {3}}[/tex]

Answer:

Option B

Answer:

[tex]x^{2/3}[/tex]

Step-by-step explanation:

The question is on rules of rational exponents

Here we apply the formulae for product rule where;

[tex]= a^{n} *a^{t} = a^{n+t} \\\\\\\\=(x^{4/3} *x^{2/3} ) = x^{4/3 + 2/3} = x^{6/3} = x^{2} \\\\\\=(x^2)^{1/3} \\\\\\=\sqrt[3]{x^2}[/tex]

[tex]=x^{2/3}[/tex]

Answer:

Step-by-step explanation:

16+(-4)-7=16 -(4+7)=16-28 = -12

Answer:

0

Step-by-step explanation:

1/cosecx = sin(x)

cosec(x) = 1/sin(x)

1/sec(x) = cos(x)

sec(x) = 1/cos(x)

1/sin(35) - 1/cos(55)

1.74344 - 1.7344  isn't that something?

0

ANSWER

The correct answer is D

EXPLANATION

The given quadratic expression is

[tex]3 {x}^{2} + 8x = - 1[/tex]

Divide through by 3

[tex]{x}^{2} + \frac{8}{3} x = - \frac{1}{3} [/tex]

We now add the square of half the coefficient of x because the coefficient of the quadratic term is now unity.

The constant we would add is

[tex] {( \frac{4}{3} )}^{2} = \frac{16}{9} [/tex]

The correct answer is D

Answer: Option D.

Step-by-step explanation:

Given the quadratic equation [tex]3x^2+8x=-1[/tex], you can observe that the leading coefficient is not 1, then you have to divide both sides of the equation by 3:

[tex]\frac{3x^2+8x}{3}=\frac{-1}{3}\\\\x^2+\frac{8}{3}x=\frac{-1}{3}[/tex]

Now, you can observe that the coefficient of the x-term is [tex]\frac{3}{8}[/tex], so you must divide it by 2 and square it. Then you get:

[tex](\frac{\frac{8}{3}}{\frac{2}{1}})^2=\frac{16}{9}[/tex]

Therefore, you must add [tex]\frac{16}{9}[/tex] to both sides of the equation.

Answer: No, because 1/3 is smaller than 2/3

Hope this helps :)

Step-by-step explanation:

Answer:

In this case, you can use the concept of cosine to calculate y, and things are even easier when you have one of the special angles which is a 45° angle.

So we know that: cos45° = √2/2

This fact will always be true. In our case, we have:

cos45° = 7/y

Therefore, we have the equation:

7/y = √2/2

⇔ 14 = y√2

⇔ y   = 14/√2

⇔ y   = √196/√2 = √(196/2) = √98 = 7√2

So y is equal to 7√2

Answer:

7√2

Step-by-step explanation:

By observation, we can determine that because this is a right angle triangle with one of the internal angles = 45°, that the remaining unknown angle is also 45°, which makes this an isosceles triangle.

This means that x = 7

we can find y by using the Pythagorean equation:

y² = x² + 7²

y² = 7² + 7²

y² = 98

y = √98 = 7√2

ANSWER

[tex]g(f( - 1)) = \frac{1}{5 }[/tex]

EXPLANATION

The given function is:

[tex]f(x) = {x}^{2} [/tex]

and

[tex]g(x) = \frac{1}{2x + 3} [/tex]

[tex]g(f(x)) = g( {x}^{2} )[/tex]

[tex]g(f(x)) = \frac{1}{2{x}^{2} + 3 } [/tex]

To find g(f(-1)), we substitute x=-1, to obtain;

[tex]g(f( - 1)) = \frac{1}{2{( - 1)}^{2} + 3 } [/tex]

We simplify the square in the denominator to get,

[tex]g(f( - 1)) = \frac{1}{2+ 3 } [/tex]

We now add the denominator to obtain;

[tex]g(f( - 1)) = \frac{1}{5 } [/tex]

Answer:

Number of different operations

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

Answer:

f(g(x)) = x² + 2x +1

Step-by-step explanation:

The given functions are:

f(x) = 4x²

g(x) = x+1

 f(x) = 4x²

(fog)(x) = f(g(x))

f(g(x)) = 4(x+1)²                 [f(x) = x² ]

 we know that (a+b)² = a² + b² + 2ab

f(g(x))  = 4(x²+1²+2(x)(1))

f(g(x))  = 4(x² + 1 + 2x )

f(g(x)) = 4x² + 8x +4

Answer:

B

Step-by-step explanation:

Given the expression

2n + 3

To determine the terms in the sequence generated by this expression

Substitute n = 1, 2, 3, 4, ... into it

a₁ = (2 × 1) + 3 = 2 + 3 = 5

a₂ = (2 × 2) + 3 = 4 + 3 = 7

a₃ = (2 × 3) + 3 = 6 + 3 = 9

a₄ = (2 × 4) + 3 = 8 + 3 = 11

a₅ = (2 × 5) + 3 = 10 + 3 = 13

The first 5 terms of the sequence are 5, 7, 9, 11, 13

Answer:

y = 5

Step-by-step explanation:

Given y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 2.5 when x = 5

k = [tex]\frac{y}{x}[/tex] = [tex]\frac{2.5}{5}[/tex] = 0.5

y = 0.5x ← equation of variation

When x = 10, then

y = 0.5 × 10 = 5

Answer:

$0.08 (rounded to nearest hundredth, 2 decimals)

Step-by-step explanation:

This is very easy if we setup a unitary method ratio.

" If 12.8 pesos equal 1 dollar, 1 peso is HOW MANY (let it be x) dollars?"

We translate the above sentence in ratio and solve for x:

[tex]\frac{Peso}{Dollar}=\frac{12.8}{1}=\frac{1}{x}\\12.8x=1\\x=\frac{1}{12.8}\\x=0.08[/tex]

Thus, it is worth about $0.08

Monarch butterflies flap their wings 12 times per second. Over the course of one hour, which is 3600 seconds, they flap their wings approximately 43,200 times.

Monarch butterflies flap their wings about 12 times per second. To figure out how many times they flap their wings in 1 hour, we need to calculate the total number of seconds in an hour and then multiply that by the flapping rate.

Step 1: Calculate the number of seconds in one hour.

Step 2: Multiply the number of seconds by the flapping rate.

So, Monarch butterflies flap their wings approximately 43,200 times in one hour.

Answer:

Option A.

Step-by-step explanation:

If you look closely at the graph, we can notice that the function is not defined at two different points.

If you look at functions B and C, you will notice that both functions are not defined at just one point. The function B is not defined at x= -5/2 and function C is not defined at x=-5. Both options are discarded, given that our function should not be defined at two fiferent points.

Now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

By analyzing the vertical asymptotes, we will see that the correct option is A.

We know that the vertical asymptotes in the graph of a rational function are at the values of x that make the denominator equal to zero.

Here, we can see that we have the asymptotes at x = -2 and at x = 5, so we can assume that the denominator is of the form:

d(x) = (x + 2)*(x - 5)

Now if you look at the options, there is only one that has this denominator, which is A:

[tex]f(x) = \frac{1}{(x + 2)*(x - 5)}[/tex]

If you want to learn more about rational functions, you can read:

https://brainly.com/question/1851758

C is the correct answer.

Answer:

f(g(x)) = g(f(x)) = x

Step-by-step explanation:

Lemma;

If f(x) and g(x) are inverses, then the compositions  f(g(x)) = g(f(x)) = x

The multiplicative inverse (or reciprocal) is the number by which you multiply another to get a product of 1.  For any fraction, simply switch the numerator and the denominator. For any whole number, place it under 1.

The reciprocal of 5/9 is 9/5.

Hope this helps!!

Hello There!

To find the reciprocal of a number, just flip the numerator and the denominator so if the numerator is 5 and the denominator is 9, the new numerator would be 9 and the new denominator would be 5.

Our multiplicative inverse of 5/9 is

[tex]\frac{9}{5}[/tex]

Answer:

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y = mx + b

m - slope

b - y-intercept (0, b)

We have the slope m = -9 and the y-intercept (0, -2) → b = -2.

Substitute:

y = -9x + (-2) = -9x - 2

The slope-intercept equation of a line with a slope of -9 and a y-intercept of (0, -2) is y = -9x - 2.

The slope-intercept equation of a line is in the form y = mx + b, where m is the slope and b is the y-intercept.

Given a slope of -9 and a y-intercept of (0, -2), the slope-intercept equation is y = -9x - 2.

Therefore, the slope-intercept equation of the line is y = -9x - 2.

Answer:

B

Step-by-step explanation:

Area of a triangle is given by the formula:

[tex]A=\frac{1}{2}bh[/tex]

Now, we need to solve for b. We multiply the right side, cross multiply, and follow rules of algebra to isolate b. Shown below:

[tex]A=\frac{1}{2}bh\\A=\frac{bh}{2}\\2A=bh\\b=\frac{2A}{h}[/tex]

Thus, b is 2 times A over h, the answer choice B is right.

Answer:

The Answer is B. b equals two times A over h

Hope This Helps!

Answer:

Without any other information the answers could be a and c because they contain the factor x+5

Step-by-step explanation:

f(-5)=0 means that x=-5 is a zero which means x+5 is a factor

Without any other information f can be any of the expressions that have the factor (x+5)

Answer:

A. (x-2)(x+5)(x-3) is the correct answer to this question

Hope it helps!