3 years ago

Write an expression that is equivalent to x+x+x+x+-20

Mathematics

1 answer:

Aleksandr [31]3 years ago

5 0

Answer:

4x-20

Step-by-step explanation:

you put the x's together and since its negative,you can make it -20 instead of +-20

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What property of equality would you use to solve x over 6 equals 7

Rainbow [258]

Answer:

multiplication property of equality

Step-by-step explanation:

since it is x/6=7 you need to multiply 6 to both sides in order to find the solution, which is 42.

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3 years ago

A dvd is on sale for $1.05 off. this is a 15% discount from the original price. use an equation to find the original price.

elena-s [515]

1.05÷.15=7.00<---
check your answer
7.00×.15=1.05

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4 years ago

Read 2 more answers

A gift shop sells 140 wind chimes per month at $90 each. The owners estimate that for each $5 increase in price, they will sell

guapka [62]

Answer: $95

Step-by-step explanation:

Te new price will be 90 + 5x, if the price increases "x" times

The number of wind chimes sold per month will become 140 - 7x

$\begin{aligned}&\text {Revenue, } \mathrm{R}(\mathrm{x})=(90+5 \mathrm{x})(140-7 \mathrm{x}) \\&R^{\prime}(x)=5(140-7 x)-7(90+5 x) \\&R^{\prime}(x)=700-35 x-630-35 x \\&R^{\prime}(x)=70-70 x=0 \\&70 x=70 \\&x=1\end{aligned}$

Therefore, if the price becomes (90 + 5(1)) = $95 per wind chime, then the revenue will be maximum

6 0

3 years ago

What is the rate and unit rate for 420 miles in 7 hours

lisabon 2012 [21]

$\frac{420mi}{7h}=\frac{420}{7}\ mi/h=60\ mph$

4 0

3 years ago

What is the result when 3x+25 is subtracted from 35x-410

Gnom [1K]

Answer:

32x-435

Step-by-step explanation:

(35x-410) - (3x+25)

35x-3x=32x

-410-25=-435

3 0

3 years ago