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3 years ago

5/6(-4 1/2)(-2 1/5) what is the answer

Mathematics

2 answers:

Goshia [24]3 years ago

8 0

Answer:

8.25 is the answer.

Step-by-step explanation:

Hope this helps!

Karo-lina-s [1.5K]3 years ago

6 0

Your answer is: 8.25

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Find the rate of change of the function f(x)=-6x+3

balandron [24]

There has to be a coefficient in the f(x) to be able to find the rate of change

3 0

3 years ago

Julia bought 18 apples at the store. She then divided the apples up between her mother, her father, and herself in 2:1:3 ratio.

slamgirl [31]

Julia bought 18 in total, and she gave each person a number of apples. We can label that number of apples as variable “a”, so we say that her mom got 2a, she got 3a and her dad got 1a (so, i.e, her mom got twice as many apples as her dad, and she for thrice as many).

In total, she gave away (to her mom, dad and herself) 2a + 3a + 1a, which is 6a in total. To find how many apples each person got, we have to find the original number of apples (“a”), with the following equation:

6a = 18 (6a is the total number of apples, since she gave away all 18)
Divide the whole eqtn by 6:
a = 18/6
a = 3
Each person got 3 apples, so her dad got 3, her mom 6, and she herself got 9. We can check: 9+6+3=18

7 0

3 years ago

The mean resting pulse rate for men is 72 beats per minute. A simple random sample of men who regularly work out at Mitch's Gym

BARSIC [14]

Answer:

We conclude that the mean resting pulse rate for men is 72 beats per minute.

Step-by-step explanation:

We are given that he mean resting pulse rate for men is 72 beats per minute. Assume that the standard deviation of the resting pulse rates of all men who work out at Mitch's Gym is known to be 2.6 beats per minute.

A simple random sample of men who regularly work out at Mitch's Gym is obtained and their resting pulse rates (in beats per minute) are listed below;

87, 89, 69, 63, 70, 65, 88, 84, 58, 53, 66, 70.

Let $\mu$ = mean resting pulse rate for men.

SO, Null Hypothesis, $H_0$ : $\mu$ = 72 beats/minute {means that the mean resting pulse rate for men is 72 beats per minute}

Alternate Hypothesis, $H_A$ : $\mu$ < 72 beats/minute {means that the mean resting pulse rate for men is less than 72 beats per minute}

The test statistics that would be used here One-sample z-test statistics as we know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\bar X$ = sample mean mean resting pulse rate = $\frac{\sum X}{n}$

= $\frac{87+ 89+ 69 +63 +70 +65+ 88+ 84+ 58+ 53+ 66+ 70}{12}$ = 71.83 beats/minute

$\sigma$ = population standard deviation = 2.6 beats per minute

n = sample of men = 12

So, the test statistics = $\frac{71.83 - 72}{\frac{2.6}{\sqrt{12} } }$

= -0.23

The value of z test statistics is -0.23.

Also, P-value of the test statistics is given by;

P(Z < -0.23) = 1 - P(Z $\leq$ 0.23)

= 1 - 0.59095 = 0.40905

Now, at 0.05 significance level the z table gives critical value of -1.645 for left-tailed test.

Since our test statistic is more than the critical value of z as -0.23 > -1.645, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that the mean resting pulse rate for men is 72 beats per minute.

3 0

4 years ago

The television show Green’s Anatomy has been successful for many years. That show recently had a share of 19, meaning that among

Leokris [45]

Answer: a) 0.1216

b) 0.8784

Step-by-step explanation:

Let P(watch) = 0.19 ;

And p(don't watch) = 0.81

Find the probability that none of the households are tuned to Found.

P(none) = (0.81)^10 = 0.1216

Find the probability that at least one household is tuned to Found.

P(at least one) = 1-P(none)

1 - 0.1216 = 0.8784

8 0

3 years ago

Please help, The first one to answers gets 10 points

babymother [125]

Answer:

6.75-2.33-1.75=2.67 hours

Step-by-step explanation:

5 0

3 years ago