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2 years ago

13

In civics, 5 of 12 freshmen have brown hair and 6 out of 15 sophomores have brown hair. What is the probability of randomly sele

cting a sophomore or someone with brown hair?

1 answer:

victus00 [196]2 years ago

5 0

Answer: 20/27

Step-by-step explanation: 15/27 + 5/27= 20/27

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Ten measurements of impact energy on specimens of A238 steel at 60 ºC are as follows:

ElenaW [278]

Answer:

Step-by-step explanation:

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2 years ago

usps charges $7 for 1st pound and additional pound $0.2.fedex charges $5 for 1st pound and $.30 for additional pound.what would

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Use google calculator use google calculator to find the sum of the times 9 times 8

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3 years ago

What is the polynomial function of lowest degree with lead coefficient 1 and roots 1 and 1 + i?

astra-53 [7]

x³ - 3x² + 4x - 2

complex roots occur in conjugate pairs

1 + i is a root then so is 1 - i

the factors of the polynomial are therefore

f(x) = (x - 1 )(x - (1 + i))(x - (1 - i))

= (x - 1 )(x² - 2x + 2 ) ( expand factors and simplify )

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4 0

3 years ago

Read 2 more answers

4 thousands + 21 tens

mafiozo [28]

4 x 1 thousand (1000) = 4000

21 x 1 ten (10) = 210

4000
+ 210
---------
4210

=4210 (four thousand-two hundred and ten

7 0

3 years ago

Read 2 more answers

Which of the following is a solution to the second order differential equation LaTeX: y''=-4y y ″ = − 4 y ? To answer this quest

Paraphin [41]

Answer:

y = sin(2t)
y = cos(2t)

Step-by-step explanation:

In the case of each of the answers listed above, the second derivative is equal to -4 times the function, as required by the differential equation.

For y = 2/3t^3, the second derivative is 4t, not -4y.

For y = e^(2t), the second derivative is 4y, not -4y.

__

The graph shows the sum of the second derivative and 4y is zero for the answers indicated above, and not zero for the other two proposed answers.

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3 years ago