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2 years ago

a football team gains 18 yards in one play and then loses 12 yards in the next what is the teams at total average

Mathematics

2 answers:

fenix001 [56]2 years ago

6 0

6 yards after two plays

Papessa [141]2 years ago

5 0

18 plus 12 divided by 2 = thats how u get the answer

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What is the greatest whole number that rounds to 67,400? What is the least whole number?

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least 67,000 (the nearest thousand)

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The domain of both f(x) = x - 6 and g(x) = x + 6 is all real numbers. What is the domain of h(x) =f(x)/g(x) ?

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The sides of a triangle have measures of 2x, 8, 12. If the measure of the longest side is 2x. What value of x makes the triangle

Strike441 [17]

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multiply all of them by power of 2

Step-by-step explanation:

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64+144 = 4x

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2 years ago

Suppose the national mean SAT score in mathematics was 510. In a random sample of 60 graduates from Stevens High, the mean SAT s

zalisa [80]

Answer:

We accept the alternate hypothesis and conclude that mean SAT score for Stevens High graduates is not the same as the national average.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 510

Sample mean, $\bar{x}$ = 502

Sample size, n = 60

Sample standard deviation, s = 30

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 510\\H_A: \mu \neq 510$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{502- 510}{\frac{30}{\sqrt{60}} } = -2.0655$

Now,

$t_{critical} \text{ at 0.05 level of significance, 59 degree of freedom } = \pm 1.671$

Since,

$|t_{stat}| < |t_{critical}|$

We reject the null hypothesis and fail to accept it.

We accept the alternate hypothesis and conclude that mean SAT score for Stevens High graduates is not the same as the national average.

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2 years ago