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3 years ago

2. what is the solution to to equation -2(x + 4)= -20?

Mathematics

1 answer:

aleksley [76]3 years ago

7 0

Answer:

$x=6$

Step-by-step explanation:

$-2(x + 4)= -20$

Divide both sides by -2:

 $x+4=\cfrac{-20}{-2}$ 

Divide -20 by -2 = 10

 $x+4=10$ 

Subtract 4 from both sides:

 $x=10-4$ 

 $x=6$ 

______________________

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69. REAL-WORLD APPLICATIONS

svp [43]

Answer:

Cost of per session the average rate is $45.

Step-by-step explanation:

It is given that a gym membership with two personal training session cost $125, while gym membership with five personal training sessions cost $260.

It is required to find what is the cost per session.

Step 1 of 1

It is given that a gym membership with two personal training session cost $125, while gym membership with five personal training sessions cost $260.

To find the cost of per session calculate the average rate.

Now let $f(x)$ be the cost per session use the for the average rate of change, and the input value is the number of personal traings x.

$m=\frac{f\left(x_{2}\right)-f\left(x_{1}\right)}{x_{2}-x_{1}}$$

Now substitute, $125 for $$f\left(x_{2}\right)$ , 260 for $f\left(x_{1}\right), 2$ for $x_{1}$ and 5 for $x_{2}$ then,

$m=\frac{260-125}{5-2}$\$$\begin{aligned}&=\frac{135}{3} \\&=45\end{aligned}$$

Cost of per session the average rate is $45.

3 0

2 years ago

Betty sets up a lemonade stand and charges $1 per glass. It cost her $50 to set up the stand. Which function gives the profit, p

Maksim231197 [3]

If you would like to find the function that gives the profit Betty makes by selling a number of glasses of lemonade, you can find this using the following steps:

p ... profit
g ... glasses of lemonade

f(g) = p = g * $1 - $50

The correct result would be f(g) = g * $1 - $50.

5 0

3 years ago

Read 2 more answers

The diameter of the circle is 6 miles. What is the area of the circle? Use 3.14 for II.

Marysya12 [62]

Answer:

28.26 miles

Step-by-step explanation:

Area= pi times radius squared

diameter is twice the radius so 6÷2=3miles

3 miles is the radius

So A= 3.14 × 3²