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4 years ago

Jeanine is twice as old as her brother Marc. If the sum of their ages is 24, how old is Jeanine?

1 answer:

3 0

Write equations for the given information to solve (using J for Jeanine and M for Marc):
J=2M
J+M= 24
Now substitute 2M in for J in the second equation:
2M+M=24, 3M=24, M=8
Remember that J=2M, so if M=8, J=16.
So Jeanine is 16 and Marc is 8

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69.15% probability of putting less than 24 ounces in a cup.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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In this problem, we have that:

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$Z = \frac{24 - 23}{2}$

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Step-by-step explanation:

Given as

A pharmacist has 40% and 60% iodine solutions on hand.

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And The quantity of 60 % iodine solutions = y liter

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Now , solving equations A and B

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