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3 years ago

I NEED THE RIGHT ANSWER ASAP.

Mathematics

2 answers:

Vlad [161]3 years ago

7 0

A, 32. Just add all the sides together and then you have your answer.

kakasveta [241]3 years ago

5 0

The correct answer is A. 32
Hope this helps, if you need any help plz contact me! ;)

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Someone please help me

vampirchik [111]

Answer:

C. 4/3x - 5

Step-by-step explanation:

First, to eliminate unnecessary answers, we can find out how to make sure the line will be perpendicular to -3/4. You will know if two lines are perpendicular if the slopes are COMPLETELY opposite. For example, 4/3 is COMPLETELY opposite from -3/4.

-3/4......4/3

So, now we know we eliminated two answers. We are left with A and C.

Then, I opened an online graphing calculator and found out which one of these lines pass through (12,9). Attached is a picture proving that answer C's line crosses through this point. Please mark me Brainliest; I need it to move on in my account! =D

7 0

3 years ago

An IQ test is designed so that the mean is 100 and the standard deviation is 18 for the population of normal adults. Find the sa

melisa1 [442]

Answer:

At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this question:

We need a sample size of at least n.

n is found when M = 3. We have that $\sigma = 18$ .

$M = z*\frac{\sigma}{\sqrt{n}}$

$3 = 1.645*\frac{18}{\sqrt{n}}$

$3\sqrt{n} = 1.645*18$

Simplifying by 3

$\sqrt{n} = 1.645*6$

$(\sqrt{n})^{2} = (1.645*6)^{2}$

$n = 97.41$

Rounding up,

At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.

8 0

3 years ago

Jacques, an artisan cheese maker, collects data on every step of the cheese-making process for each batch he makes. Jacques noti

Jobisdone [24]

Answer:

c. The moming pH of the cheese tends to be higher when the daly Ngh temperature in the shop is cooler compared 10 when the duly high temperature is warmer

Daily high temperature and the pH of cheese are inversely related.When one variable increases, the other one decreases.

Step-by-step explanation:

When there is a negative correlation between two variables, it means when one variable increases, the other one decreases.A correlation of -0.64 means that the variable do not have a strong negative correlation because its less that -0.9. However, this correlation is not a weak negative correlation because the value is more that -0.1

8 0

3 years ago

0.5m = 0.75 Solve for m Pls and thx

Likurg_2 [28]

Answer: The answer is m=1.5

Step-by-step explanation: Divide both sides by 0.5 and you will find m.

6 0

3 years ago

What is 43 x 2452?

Dafna11 [192]

$43*2452=105436$