REWARDING BRAINLY FOR CORRECT ANSWER

Delvig [45]

$\frac{x}{8} = \frac{8}{64} \\ 64x = 8 \times 8 \\ 64x = 64 \\ x = \frac{64}{64} \\ \boxed{x = 1}$

Proportion for x is 1.
Use cross multiplication.

5 0

2 years ago

At the track practice, Sam practiced running the hurdles for 1 hour and 25 minutes. Then he practiced the high jump for 20 minut

blagie [28]

Answer:

Practice started at 1:55 pm.

Step-by-step explanation:

6 0

2 years ago

A and B are complementary angles if angle a equals (X +24) and angle B equals (X +16) then what is the measurement of b

Hatshy [7]

If A and B are complementary angles, then they add up to 90 degrees.

So A + B = 90 => (x + 24) + (x + 16) = 90 => 2x + 40 = 90 => 2x = 50.

So x = 25, and thus, the measurement of B is (25 + 16) = 41.

The measurement of angle A is (25 + 24) = 49, and indeed they are complementary.

4 0

3 years ago

Ten times the sum of half a number and 6 is 8

Delvig [45]

Im sorry but I don't really get the question, can you please explain it a little better?

4 0

3 years ago

Determine the critical value or values for a one-mean z-test at the 1% significance level if the hypothesis test is right-tailed

kifflom [539]

Answer:

We need to conduct a hypothesis in order to determine if the mean is greater than specified value, the system of hypothesis would be:

Null hypothesis: $\mu \leq \mu_o$

Alternative hypothesis: $\mu > \mu_o$

For this case the significance is 1%. So we need to find a critical value in the normal standard distribution who accumulates 0.99 of the area in the left and 0.01 in the right and for this case this critical value is:

$z_{crit}= 2.326$

Step-by-step explanation:

Notation

$\bar X$ represent the sample mean

$\sigma$ represent the standard deviation for the population

$n=$ sample size

$\mu_o$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to determine if the mean is greater than specified value, the system of hypothesis would be:

Null hypothesis: $\mu \leq \mu_o$

Alternative hypothesis: $\mu > \mu_o$

For this case the significance is 1%. So we need to find a critical value in the normal standard distribution who accumulates 0.99 of the area in the left and 0.01 in the right and for this case this critical value is:

$z_{crit}= 2.326$

3 0

2 years ago