2 years ago

Help 1-8 I need answers and show work!!!

Mathematics

1 answer:

agasfer [191]2 years ago

6 0

Answer:

hope this helps you out good luck

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Two fishing boats leave a marina at the same time. One boat travels north at a speed of 12 miles per hour. The other boat heads

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Answer:

5.25 miles

Step-by-step explanation:

15 min=1/4 of hour

12/4=3

9/4=2.25

3+2.25=5.25

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0 A maker of a certain brand of low-fat cereal bars claims that the average saturated fat content is 0.5 gram. In a random sampl

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Answer:

The first step is to determine the average

$x= \frac{0,6+0,7+ 0,7+0,3+0,4+ 0,5+ 0,4 +0,2}{8}\\\ x= 0,475$

The exercise says it’s a normal distribution: (n=8)

$s^{2}= \frac{1}{n-1} ((0,6.x)^2+2(0,7-x)^2+(0.3-x)^2+2(0.4-x)^2+(0.5-x)^2+(0.2-x)^2)\\\ \frac{1}{7}*0,235 = 0,0336 \\\\ s= 0183$

According to the exercise, the mean is equal to 0,5 then the value of t of the distribution can be obtained

$t= \frac{x-u}{\frac{s}{\sqrt{n} }}\\\ t= \frac{0,475 - 0,5}{0,183}\\\ t= -0,3860$

The variable t has 7 grade to liberty, we calculate the p-value as:

$2* P(t < - 0,3860)= \\\ 2* 0,3554 = 0,7108$

This value is very high, therefore the hypothesis is not rejected

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3 years ago

If you’re good with geometry can you help me?

Paladinen [302]

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a: AB is perpendicular to CD

b: AM is equal in length to BM

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Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤53)?

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Answer:

Step-by-step explanation:

Use the formula to find the z-score, then go to the table that will give you the probability that the value is less than this z-score.

$z=\frac{53-50}{3}=1$

The probability that the value lies to the left of 1 on a standard bell curve is 84.1345%, or 84%, the third choice down.

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How can the expression 3(4x) + 2(7y) be simplified?

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The answer is:
12x+14y

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