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3 years ago

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The average score on a test taken by 200 students is 80 and standard deviation is 10. if each student's score is increased by 5,

what would be the new mean and standard deviation

1 answer:

Jlenok [28]3 years ago

5 0

New mean = 100 I believe. Could be wrong. I’m tired so I might not be thinking straight

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It takes Jesse 2/3 hour to mow her backyard. How much of the yard will be mowed after 1/4 hour?

Luden [163]

Answer:

ITMW QILL BE YOUR FROM APEX LERING AND YOUR FROM MIDDLE SCHOOL SO STOP FINDING QUESTION

Step-by-step explanation:

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3 years ago

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What is the factorization of 3x2 – 8x + 5?

ELEN [110]

we have

$3x^{2} -8x+5$

Equate the expression to zero to find the roots

$3x^{2} -8x+5=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$3x^{2} -8x=-5$

Factor the leading coefficient

$3(x^{2} -(8x/3))=-5$

Complete the square. Remember to balance the equation by adding the same constants to each side.

$3(x^{2} -(8x/3)+(16/9))=-5+(16/3)$

$3(x^{2} -(8x/3)+(16/9))=(1/3)$

Rewrite as perfect squares

$3(x-(4x/3))^{2}=(1/3)$

$(x-(4x/3))^{2}=(1/9)$

square roots both sides

$(x-\frac{4}{3})=(+/-) \sqrt{\frac{1}{9}}$

$x=\frac{4}{3}(+/-) \frac{1}{3}$

the roots are

$x=\frac{4}{3}+ \frac{1}{3}=\frac{5}{3}$

$x=\frac{4}{3}- \frac{1}{3}=\frac{3}{3}=1$

so

$3x^{2} -8x+5=3(x-\frac{5}{3})(x-1)=(3x-5)(x-1)$

therefore

<u>the answer is the option</u>

$(3x-5)(x-1)$

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2 years ago

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SELECT ALL MODELS I WILL GIVE BRAINLIEST 6TH GRADE MATH

bonufazy [111]

Answer:

The first, third, and fourth options are less than 50% shaded.

Step-by-step explanation:

Each model has 100 squares, and if you count the squares, the first, third, and fourth models have less than 50 squares shaded in.

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3 years ago

The equation of the line parallel to 3x-y=6 and passing through the point (3 , 2) is

never [62]

Answer: y=3x-7

Step-by-step explanation:

First you have to get the equation in slope intercept form by moving x over then dividing by -1 because y cannot be negative

Then since you're trying to find the line that is parallel you use the same slope which is 3x

You then plug in the points which is 2=3(3) + b for you are trying to find teh y intercept

You then solve as normal and get y=3x-7

I am pretty sure this is correct

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3 years ago

Anna put $500 into a savings account and made no more deposits or withdrawals. The account earns 2% simple interest per year. Ho

castortr0y [4]

Answer:

$552.04

Step-by-step explanation:

Lauren, use the compound amount formula: A = P(1 + r)^n.

Here P is the principal and is $500; r is the annual interest rate as a decimal fraction, and n is the number of years.

After 5 years, Anna will have: $500(1 + 0.02)^5 = $552.04

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3 years ago