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3 years ago

How do you solve this 2 step equation: 8+b/-4=5

1 answer:

3 0

I'm going to rewrite the equation assuming this is the correct form:
$8 - \frac{b}{4} = 5
\newline
-8 + 8 - \frac{b}{4} = 5 - 8
\newline
(-4)\cdot -\frac{b}{4} = -3 \cdot (-4)
\newline
b = -12$

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gregori [183]

Answer:

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Plan B last 1.5 hours or 90 minutes.

Step-by-step explanation:

Let $a$ be the number of hours that the plan A last, an $b$ the number of hours of plan B. Then for the Wednesday you have:

$2a+3b=6$

And for the Thursday is:

$6a+5b=12$

Multiply the equation of Wednesday by -3:

$-6a-9b=-18$

Using the method of addition using this last equation and the equation of Thursday

$-6a-9b=-18\\6a+5b=12\\--------\\-4b=-6\\b=\frac{-6}{-4}\\b=1.5 hours$

Replacing the value of $b$ in one of the equations

$6a+5b=12\\6a+5(1.5)=12\\6a+7.5=12\\6a=12-7.5\\a=\frac{4.5}{6} \\a=0.75hours$

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3 years ago

A cube has a side length of 4 feet what is the volume of the cube

dalvyx [7]

Answer:

V=64

Step-by-step explanation:

What you do is go based off the volume formula of a cube which is V=a^3.

You have a side length of 4.

V=4^3.

V=64.

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3 years ago

What is the area of the parallelogeam

nlexa [21]

I believe it is 2 feet because area is base multiplied by height. So, 3 x 2/3 is 2.

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4 years ago

(-2.4) - 0.8 times -4.3

ICE Princess25 [194]

Answer is this:

1.04

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3 years ago

Point R is at (3, 1.3) and Point T is at (3, 2.4) on a coordinate grid. The distance between the two points is _____.

Bond [772]

Answer:

d = 1.1 units

Step-by-step explanation:

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3 years ago

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