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2 answers:
Answer:
4 liters of 5% solution and 16 liters of 17.5% solution we need.
Step-by-step explanation:
Let us assume that x liters of 5% solution and y liters of 17.5% solution are taken.
So, x + y = 20 ........ (1)
As the final solution is of 15%, so we can write
⇒ 5x + 17.5y = 300 ......... (2)
Now, solving equations (1) and (2) we get,
17.5y - 5y = 200
⇒ 12.5y = 200
⇒ y = 16 liters
Hence, x = 20 - y = 4 liters.
Therefore, 4 liters of 5% solution and 16 liters of 17.5% solution we need. (Answer)
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Answer:
Given parallelogram MNFQ,
Prove: ∠N ≅ ∠Q
Since, by the definition of parallelogram opposite sides are congruent,
That is, MN≅QP and MQ≅NP.
Statement Reason
1. MNPQ is a parallelogram. 1. Given
2. MN≅QP 2. Definition of parallelogram
MQ≅NP
3. MP≅MP 3. Reflexive
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5.∠N≅∠Q 5. CPCTC
We know expression is used for represent the derivative.
Actually, derivative is the second name of " Rate of Change".
And if we read , it represents the "Rate of change of y with respect to x".
In simple words, a derivative is the rate of change or slope of a very small portion of a function.
dy represents very small change in y-coordinate and dx represents very small change in x-coordinate.
Because deriviate is the second name of " a very small rate of change".
We use to represent the derivative.