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Step2247 [10]
3 years ago
15

PLZZZ HELP ITS FOR MY FINAL if 7a/8=14 then 12a=

Mathematics
1 answer:
hodyreva [135]3 years ago
5 0
A=16

So 12A would be (12*16)
So 12A= 192
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Lakshmi donates 20% of her income to charity. What fraction of her income does Lakshmi donate to charity?
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3 years ago
How many liters each of a 35% acid solution and a 80% acid solution must be used to produce 60 liters of a 65% acid solution? (R
serg [7]

Solving a system of equations we will see that we need to use <u>40 liters of the 80% acid solution</u>, and the other <u>20 liters are of the 35% acid solution</u>.

<h3>How many liters of each solution do we need to use?</h3>

First, we need to define the variables:

  • x = liters of the 35% acid used.
  • y = liters of the 80% acid used.

We know that we want to produce 60 liters of 65% acid, then we have the system of equations:

x + y = 60

x*0.35 + y*0.80 = 60*0.65

(in the second equation we wrote the percentages in decimal form).

To solve this we need to isolate one of the variables in one equation and then replace it in other one, isolating x we get:

x = 60 - y

Replacing that in the other equation:

(60 - y)*0.35 + y*0.80 = 60*0.65

y*(0.80 - 0.35) = 60*(0.65 - 0.35)

y*0.45 = 60*0.30

y = 60*0.30/0.45 = 40

So we need to use <u>40 liters of the 80% acid solution</u>, and the other <u>20 liters are of the 35% acid solution</u>.

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

7 0
2 years ago
Help!! I have this for a test and im very confused
skad [1K]

Answer:

check this out

Step-by-step explanation:

3 0
2 years ago
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2. A six sided cube was rolled. What is the probability of showing an odd number?"
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Answer:

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Step-by-step explanation:

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3.36/10.5 = 0.32

It costs $0.32 an ounce
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3 years ago
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