If a=12 and 120% of a is equal to 80% of b then what is a+b

1 answer:

8 0

A=12
120% of a =80% of b
120%a = 80%b
120a/100 = 80b/100
Divide through by 100
120a = 80b
Divide through by 80
120a/80 = b
But a=12
120x 12/80 = b
18 = b
b = 18

a+b = 12 + 18 = 30

You might be interested in

Which equation does not represent a linear function of x ?

KatRina [158]

$The\ linear\ function\ represent\ an\ equations:\\\\y=mx+b;\ Ax+By=C;\ Ax+Bx+C=0$

$therefore:\\A)\ y=2x^3-3\to\boxed{NO}\\\\B)\ y=\frac{4}{3}x\to\boxed{YES}\to y=mx+b\\\\C)\ y=\frac{x}{4}=\frac{1}{4}x\to\boxed{YES}\to y=mx+b$

7 0

3 years ago

Read 2 more answers

You buy a storage rack that holds 40 CDs you have 27 CDs write an inequalityt that describes how many more cds you can buy and s

MAVERICK [17]

CD's must be 40 or below, so CD's total≤ 40
If you already have 27, than 27+(number of CDs bought)≤ 40
27+x=40(max)
x=(40-27)
x=13 CDs can be bought, at maximum
so (CDs purchased) ≤ 13
Therefore, 15 CDs would be too many to fit in the rack

5 0

3 years ago

I need help on this one

umka2103 [35]

You seem to have gotten m∠2. Remember that ∠1 and ∠2 are alternate interior angles, meaning they're both equal. Since they gave you m∠1 as being 26°, you now know the measure of ∠2.

As for m∠3 and m∠4, If you look at ∠3 you'll see that it is complementary to ∠1 (They both add up to 90°), so if you subtract m∠1 from 90° you'll have found m∠3. You find m∠4 the same way.

Hope this helped.

6 0

3 years ago

The speed of sound in air is 340 m/s. How far , in meters, would a sound of wave travel on 7 seconds?

Rasek [7]

Answer:

2 380m

Step-by-step explanation:

very simple just multiply 7×340

4 0

2 years ago

If Jay-Jay walks 8 miles in 2 hours on average, how far will he walk if he continues at the same pace for 3 hours?

Cerrena [4.2K]

Answer: it is 12 hours

Step-by-step explanation: hope it helps

8 0

3 years ago

Read 2 more answers