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3 years ago

Jan can walk 5 miles in one hour. How long will it take her to walk one mile?

Mathematics

1 answer:

Basile [38]3 years ago

8 0

1 hour = 60 minutes
60 minutes ÷ 5= 12
Answer is 12

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Write a 3-digit number that is divisible by 9.

Digiron [165]

Answer:900

Step-by-step explanation:

900/9=100

100x9=900

5 0

2 years ago

Rewrite the expression in a radical form z^1/6

mylen [45]

Answer:

$\sqrt[6]{z}$

Step-by-step explanation:

The denominator of the fractional exponent is the index of the root.

7 0

3 years ago

If Rihanna deposite 1500 rupees in the school fund at 9 p.C.P.A for 2 years, what is the total amount she will get?

S_A_V [24]

Answer: 1770 rupees

Step-by-step explanation:

To solve this, we first calculate the simple interest which will be:

= (P × R × T) / 100

= (1500 × 9% × 2) / 100

= (1500 × 0.09 × 2) / 100

= 270

The total amount tha she'll get will be:

= 1500 + 270

= 1770 rupees

3 0

2 years ago

What is the solution to this system of linear equations?

gregori [183]

Answer:

(-2,1)

Step-by-step explanation:

Just identify what point on the graph the lines intersect.

4 0

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.

7 0

2 years ago