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kipiarov [429]
2 years ago
10

Alvin is 11 years younger than Elga. The sum of their ages is 43. What is elgas age

Mathematics
1 answer:
Neporo4naja [7]2 years ago
5 0

Answer:

16

Step-by-step explanation:

Lets assume x is Elgas' age

And y is Alvins age

we know that alvin is 11 years younger than Elga which means,

x=y+11

and the sum of their age is 43

x+y=43

solve it and you get 16

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Answer:

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Solution:

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Since n > 30

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x = 51.48\\\mu = 50\\\sigma = 15\\ n = 64

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z =\frac{51.48-50}{\frac{15}{\sqrt{64}}}

z =0.789

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Since we are given that we are supposed to find The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average.

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So, we accept the null hypothesis.

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3 years ago
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Composite numbers are numbers that are not prime.
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6 0
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Answer:

The volume of can A is half the volume of can B.

Step-by-step explanation:

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Required

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Volume = \pi r^2h

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4 0
3 years ago
A bag contains 5 blue marbles, 2black marbles ,and 3 red marbles. A marine is randomly drawn from the bag The probability of not
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<h3>Answers:</h3>

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