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3 years ago

Kaya polled the first 82 runners to finish a marathon. Is this sample of the runners likely to be representative?

Mathematics

1 answer:

emmasim [6.3K]3 years ago

7 0

Answer:

Step-by-step explanation:

the FIRST 82 RUNNERS does not accurately represent the last or the middle placed runners to finish

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Brian scored one tenth of the points for his basketball team in the state championship game. Joe scored one fourth of the points

Airida [17]

x/10 + x/4 = 21 /*40

4x + 10x = 840

14x = 840

x = 60 = total number of points the team scored

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3 years ago

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Write 6.92 x 10 -8 in standard notation.

Vaselesa [24]

There is 16 ounces in a pound, and #1 is B I believe

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3 years ago

What is equal to 0/0 0 0 0 none of the above

babunello [35]

Answer:

well um I have to go with 0

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3 years ago

Is the given function phi(x) = x^2 - x^-1 an explicit solution to the linear equation d^2y/dx^2 - 2/x^2 y = 0? Circle your answe

mart [117]

Answer:

Yes

Step-by-step explanation:

We are given that a function $\phi(x)=x^2-x^{-1}$

We have to find that given function is an explicit solution to the linear equation

$\frac{d^2y}{dx^2}-\frac{2}{x^2}y=0$

If given function is an explicit solution of given linear equation then it satisfied the given differential equation

Differentiate w.r.t x

Then we get $\phi'(x)=2x+x^{-2}$

Again differentiate w.r.t x

Then we get

$\phi''(x)=2-\frac{2}{x^3}$

Substitute all values in the given differential equation

$2-\frac{2}{x^3}-\frac{2}{x^2}(x^2-x^{-1})$

= $2-\frac{2}{x^3}-2+\frac{2}{x^3}=0$

Hence, given function is an explicit solution of given differential equation.

Therefore, answer is yes.

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3 years ago

Find the GCF (Greatest Common Factor) of 64 and 144

valkas [14]

Answer: 16

Step-by-step explanation:

if we were to list all the factors of 64 and 144

64= 1,2,4,8,8,16,32,64

144= 1,2,3,4,6,8,9,12,12,16,18,24,36,48,72,144

therefore the GCF of 64 and 144 is 16

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3 years ago

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