3 years ago

BRAINLY I NEED HELP ASAPPPP!!

Mathematics

1 answer:

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

8 0

Answer:

Step-by-step explanation:

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Solve the equation: 12+3/4x=14

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Answer:

x=2 and 2/3

Step-by-step explanation:

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(-5x^6+7x+1)-(8x^2+x-10)<br><br> Algebra 1 subtracting polynomials please help

BaLLatris [955]

Answer:

-5x^6-8x^2+6x+11

Step-by-step explanation:

(-5x^6+7x+1)-(8x^2+x-10)

Remove parentheses

-5x^6+7x+1-(8x^2+x-10)

-(8x^2+x-10)=-8x^2-x+10

-5x^6+7x+1-8x^2-x+10

Simplify

-5x^6-8x^2+6x+11

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3 years ago

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

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3 years ago

Solve the inequality.

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C . no solution , that’s what I think :)

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3 years ago

Are the triangles similar?

Reil [10]

C. Not similar hope this helps

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3 years ago