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3 years ago

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the mean age of w student book club is 14.2 years. a 27-year-old teacher is invited to join the club. how does the teachers age

affect the new mean?

1 answer:

Masteriza [31]3 years ago

3 0

The answer is B. the new mean age will be greater than 14.2 because 27 is bigger than the mean age.

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Select the correct answer. what is the solution set of y = x2 2x 7 and y = x 7? a. {(0, 7), (-1, 6)} b. {(0, 7), (-7, 0)} c. {(0

Kaylis [27]

Answer:

a. {(0, 7), (-1, 6)}

Step-by-step explanation:

$y = x^{2} +2x+7\\y=x+7$

subtract the equations

$y = x^{2} +2x+7 \\- \ \ \ \ \ y=x+7\\y - y =x^{2} +2x+7-(x+7)\\0=x^{2} +x\\x = 0 \ and \ x= -1$

for $y = x^{2} +2x+7$ , substitute x = 0

$y = (0)^{2} +2(0)+7\\y = 0 +0+7\\y=7$

for $y = x^{2} +2x+7$ , substitute x = 0

$y = (-1)^{2} +2(-1)+7\\y = 1 -2+7\\y=6$

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1 year ago

(x^4+15x^3-77x^2+13x-36)+(x-4)

Olenka [21]

Answer:<span> =<span><span><span><span><span>x4</span>+<span>15<span>x3</span></span></span>−<span>77<span>x2</span></span></span>+<span>14x</span></span>−<span>40</span></span></span>

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3 years ago

Read 2 more answers

Que porcientos es 200 de 600

kumpel [21]

$\displaystyle \\ 
 \frac{200}{600} = \frac{2}{6} = \frac{1}{3} = 0,(3) = \frac{33,(3)}{100} = \boxed{33,(3)\%}$

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2 years ago

aleksklad [387]

Answer:3

Step-by-step explanation:

6 0

3 years ago

This question has two parts, First, answer Part A Then, answer Part B

krek1111 [17]

1/2x-7=1/3x-4,

1/2x-3=1/3x,

1/2x-1/3x=3

1/6x=3/1/6

Final answer x=18

I hope you understand and best wishes!!

4 0

2 years ago