Answer:
what is the 2nd problem????
Step-by-step explanation:
Answer:
Step-by-step explanation:
26% is (26-20)/(50-20) = 6/30 = 1/5 of the way between 20% and 50%. That means 1/5 of the solution is 50% acid.
50% acid: 1/5 · 100 mL = 20 mL
20% acid: 100 mL -20 mL = 80 mL
Delbert must mix 80 mL of 20% acid and 20 mL of 50% acid.
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Maybe you'd like to see an equation. Let x represent the amount of 50% acid required. Then 100-x is the amount of 20% acid needed. The amount of acid in the mix is ...
0.50(x) +0.20(100 -x) = 0.26(100)
(0.50 -0.20)x = (0.26 -0.20)100 . . . . subtract 0.20(100)
x = (0.26 -0.20)/(0.50 -0.20)×100 = 20
This last expression should look a lot like the one we started with in this answer. It shows you how you can almost write down the answer to mixture problems without a lot of work.
An equation is 16-9=7
9+7=16
16-7=9
16-9=7
13.48 - 8.263 = 5.217
So your answer is C. 5.217.
Question: Which equation is equivalent to
Option A:
Option B:
Option C:
Option D:
Answer:
Option C:
Solution:
Given expression:
Convert 16 to the base 2 and 32 to the base 2.
Using exponential rule:
Using the rule,
8p = 5p + 15
3p = 15
p = 5
Substitute p = 5 in given expression, we get
<u>To find the equivalent expression to the given expression:</u>
Option A:
Using the rule,
⇒ 4p = 4p + 3
⇒ 0p = 3
No solution for p, so it is not equivalent to the given expression.
Option B:
Using the rule,
⇒ 4p = 4p + 12
⇒ 0p = 12
No solution for p, so it is not equivalent to the given expression.
Option C:
Using the rule,
⇒ 8p = 5p + 15
⇒ 3p = 15
⇒ p = 5
Substitute p = 5 in , we get
It is equivalent to the given expression.
Option D:
Using the rule,
⇒ 8p = 5p + 3
⇒ 3p = 3
⇒ p = 1
Substitute p = 1 in , we get
It is not equivalent to the given expression.
Hence Option C is the correct answer.