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3 years ago

PLEASE HELP FAST!!!! I’ll mark brainliest

Mathematics

2 answers:

amm18123 years ago

5 0

First one!

I hope this helps

nekit [7.7K]3 years ago

4 0

Answer:

Step-by-step explanation:

the first one, because 4 times 3 is twelve, minus 0 is twelve

unless it means less than, then it is the last one

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What is the quotient 2y^-6y-20/4y+12 ÷ y+5y+6/3y^2+28y+27

malfutka [58]

Answer with explanation:

$\rightarrow \frac{\frac{2y^2-6 y-20}{4 y+12}}{\frac{y^2+5 y+6}{3 y^2+28 y+27}}\\\\\rightarrow \frac{\frac{y^2-3y-10}{2 y+6}}{\frac{(y+2)(y+3)}{3 y^2+28 y+27}}\\\\\rightarrow \frac{\frac{(y-5)(y+2)}{2 (y+3)}}{\frac{(y+2)(y+3)}{3 y^2+28 y+27}}\\\\\rightarrow \frac{(y-5)(y+2)}{2 (y+3)}} \times {\frac{3 y^2+28 y+27}{(y+2)(y+3)}}\\\\ \rightarrow\frac{(y-5)\times(3 y^2+28 y+27)}{2 (y+3)^2}}$

→y²+5y+6

=y²+3 y+2 y+6

=y×(y+3)+2×(y+3)

=(y+2)(y+3)

→y² -3 y-10

=y² -5 y+2 y -10

=y×(y-5)+2×(y-5)

=(y+2)(y-5)

6 0

3 years ago

Read 2 more answers

If m∠D + m∠E = 180°, then ∠D and ∠E are classified as what kind of angles?

Archy [21]

The other person is literally wrong. The answer is D. Supplementary because two angles that add up to 180 are supplementary angles.

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2 years ago

The reading speed of second grade students in a large city is approximately normal, with a mean of 90 words per

kari74 [83]

Answer:

The probability that a random sample of 10 second grade students from the city results in a mean reading rate of more than 96 words per minute

P(x⁻>96) =0.0359

Step-by-step explanation:

Explanation:-

Given sample size 'n' =10

mean of the Population = 90 words per minute

standard deviation of the Population =10 wpm

we will use formula

$Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }$

Let X⁻ = 96

$Z = \frac{96-90 }{\frac{10}{\sqrt{10} } }$

Z = 1.898

The probability that a random sample of 10 second grade students from the city results in a mean reading rate of more than 96 words per minute

$P(X^{-}>x^{-} ) = P(Z > z^{-} )$

= 1- P( Z ≤z⁻)

= 1- P(Z<1.898)

= 1-(0.5 +A(1.898)

= 0.5 - A(1.898)

= 0.5 -0.4641 (From Normal table)

= 0.0359

Final answer:-

The probability that a random sample of 10 second grade students from

= 0.0359

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3 years ago

What is the theoretical probability that a coin toss results in two heads showing?

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Since it's not mentioned I assume the Event of tossing a die twice are done simultaneously.

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3- What is the experimental probability that a coin toss results in two tails showing? Same logic as the previous one

4- What is the theoretical probability that a coin toss results in one head and one tail showing? If you get one Head, P(H) =1/2 and if you want a tail in the 2nd toss P(1/2). So P(one Head AND one tail) = 1/2 x 1/2 = 1/4

5- What is the experimental probability that a coin toss results in one head and one tail showing? Same as 3- or 4-

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2 years ago

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DedPeter [7]

Answer:

I love algebra anyways

The ans is in the picture with the steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

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