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Gre4nikov [31]
3 years ago
13

The solution of the equation 5-2x=-4x-7 is?

Mathematics
2 answers:
dangina [55]3 years ago
5 0
Change the subtraction to add 2x plus -4x
5=-4x (+2x)-7

5=-2x-7

since the x's are now on one side and we can't do anything with 5, on the other side you change -7 to add to the other side.

5 (+7)= -2x

12= -2x

divide -2 by 12.

-6 = x
Nana76 [90]3 years ago
3 0
-2x+4x=-7-5
2x=-12
X=-12/2
X=-6
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What is the slope intercept from of the equation of the line that that passes through the points (-3, 2) and (1, 5)
viva [34]

The slope-intercept form of a line:

y=mx+b\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\to slope\\\\b\to y-intercept

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Problem 37

<h3>Answer: B. 4 & 1/4 gallons</h3>

-------------------

Work Shown:

The 3/4 and 1/2 add up to (3/4)+(1/2) = (3/4)+(2/4) = 5/4 = 1&1/4

The whole part 1 is then added to the other whole parts 1 and 2 to get 1+2+1 = 4

Overall, the grand total is 4 & 1/4

An alternative way is to convert each mixed number to a decimal to get 1&1/2 = 1+1/2 = 1+0.5 = 1.5 and 2&3/4 = 2+3/4 = 2+0.75 = 2.75

Add up those decimals 1.5+2.75 = 4.25

then convert that result to a mixed number: 4.25 = 4+0.25 = 4+1/4 = 4&1/4

================================================

Problem 38

<h3>Answer: C. Cubic feet</h3>

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The units for volume follow the template "Cubic _____" where you'll write "feet", "inches", "centimeters" or whatever unit you are using in the blank.

Some other examples:

* cubic miles

* cubic meters

* cubic yards

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