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3 years ago

Please help with this question

Mathematics

1 answer:

Assoli18 [71]3 years ago

5 0

Answer:

75°

Step-by-step explanation:

Please see attached picture for full solution.

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|2 + 3x| = |4 - 2x|<br> Plz

KiRa [710]

Answer:

3x+2|=lpz(|−2x+4|)

Step-by-step explanation:

4 0

3 years ago

I need help ive been suck on this for so long please help me

eimsori [14]

Answer:

m∠a = 50°

Step-by-step explanation:

Since this is an isosceles triangle, we know that the other unknown angle is also 65°. Since all angles in a triangle add up to 180°,

180 - 65(2) = a

a = 180 - 130

a = 50°

7 0

3 years ago

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Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidenc

quester [9]

Answer: 18

Step-by-step explanation:

The formula to find the minimum sample size is given by :_

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation.

z*= critical z-value.

E= Margin of error.

Given : $\sigma= 13$

E= ± 8

We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]

Then, the required sample size would be :

$n=(\dfrac{(2.576)\cdot (13)}{8})^2$

$\Rightarrow\ n=(4.186)^2$

$\Rightarrow\ n=17.522596\approx18$ [Round to next integer.]

Hence, the required minimum sample size = 18

4 0

4 years ago

Michelle read 72 pages in 3 hours. What was her unit rate of pages read per hour?

shutvik [7]

Answer:

24 pages per hour

Step-by-step explanation:

72 pages = 3 hours

To find the rate of pages per hour, divide both sides by 3.

72/3 = 24, 3/3=1

24 pages per 1 hour, 24:1

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3 years ago

Find the y-intercept of the function y=-2/3(x-1)+7.

horrorfan [7]

AaaAnswer : y=2/3x+23/3

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4 years ago