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3 years ago

PLEASE HELP !!! help me solve 7th grade math

Mathematics

1 answer:

densk [106]3 years ago

7 0

Answer:

x=6

Step-by-step explanation:

5x-10=2x+8

subtract 2x on both sides

3x-10=8

add 10 on both sides

3x=18

x=6

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Jamar drove 228 miles and used 6 gallons of gas.

Klio2033 [76]

Step-by-step explanation:

well, it is kind of written already :

228 miles and 6 gallons.

so, miles/gallon = 228/6 = 38 miles/gallon.

it is not mentioned, but I guess we have to assume that he got the same miles/gallon ratio on this trip as well.

so, again

38 miles/gallon

and he used 9 gallons.

so, he drove 38×9 = 342 miles

7 0

2 years ago

Find x. Round to the nearest tenth if necessary.a 4 b 5 c 6 d 3

DiKsa [7]

The answer is B. 5

6+2=8

3+5=8

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3 years ago

Find the surface area of the right triangular prism shown

Inessa05 [86]

The surface area of the triangular prism is 144 cm²

<u>Explanation:</u>

Given:

Base of the triangle = 4

Height of the triangle = 3

Hypotenuse of the triangle = 5

Length of the prism = 11

Surface area of the rectangular prism = ?

Surface area, A = $ah+bh+ch+\frac{1}{2} \sqrt{-a^4 + 2(ab)^2 + 2(ac)^2 - b^4 + 2(bc)^2 - c^4}$

On substituting the value, we get:

$A = 4 X 11+ 3X11+5X11+\frac{1}{2} \sqrt{-(4)^2 + 2(4X3)^2 + 2(4X5)^2 - 3^4 + 2(3X5)^2-5^4} \\\\A = 144 cm^2$

Therefore, the surface area of the triangular prism is 144 cm²

6 0

3 years ago

A store sells a certain digital camera model for $108. During a special promotion, the camera is discounted by 30%. What is the

Pavel [41]

Answer:

discount=108$-$32.4=75.6

3 0

3 years ago

Marking Brainliest ! Answer quickly

Alex

Answer:

5/7

Step-by-step explanation:

20/28=5/7

Hoped i answered u

4 0

3 years ago

Read 2 more answers