4 years ago

How do I do this example 8(10a-4)+5a and 5a-12 are equivalent? Is she correct?

1 answer:

4 0

8(10a - 4) + 5a = 5a - 12
8(10a) - 8(4) + 5a = 5a - 12
80a - 32 + 5a = 5a - 12
80a + 5a - 32 = 5a - 12
85a - 32 = 5a - 12
-5a -5a 
80a - 32 = -12
 +32 +32
 80a = 20
 80 80
 a = 1/4

You might be interested in

Make a the subject of the formula: v^2=u^2+2as. Please help & show working

Helga [31]

It just means to isolate a. You can start like this::

V^2 = U^2 + 2AS
V^2 - U^2 = 2AS
(V^2 - U^2)/2S = A
A= (V^2 - U^2)/2S

6 0

3 years ago

I need help asap please!

DerKrebs [107]

Answer:

Step-by-step explanation:

4 0

3 years ago

What is the volume of a box that has a length of 10 inches,a width of 3 inches,and a height of 7 inches!!

Zanzabum

$V=Lenght*widht* height \\\\ V=10*3*7 \\\\ \boxed{V=210 \ inches^3}$

7 0

4 years ago

Read 2 more answers

Kevin plans to put concrete on a rectangular portion of his driveway. The portion is 10 feet long and 3 inches high. The price o

Mashutka [201]

3 feet wide hope it helps

8 0

3 years ago

Read 2 more answers

Find the average of 60 75 88 and 93

Lapatulllka [165]

Answer:

The average of the four numbers is 79.

4 0

4 years ago