3 years ago

Help needed with these for problems

Mathematics

1 answer:

Tatiana [17]3 years ago

4 0

I can't read the first one and I also don't know

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12 + 9/3 exponent 2<br><br> What is the answer?

ira [324]

9/3 = 3
3 exponent 3 = 27.

27 + 12 = 39

3 0

3 years ago

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I dont know what to do

Margarita [4]

It is -12<n<-11 so it is between that

5 0

4 years ago

The length of a text message is conversation is normally distributed with a mean of 2 min and a standard deviation of 0.5 min.

Dmitry_Shevchenko [17]

$\mathbb P(X>3)=\mathbb P\left(\dfrac{X-2}{0.5}>\dfrac{3-2}{0.5}\right)=\mathbb P(Z>2)$

About 95% of a normal distribution lies within two standard deviations of the mean, so 5% lies without, and since the distribution is symmetric, 2.5% lies to either side. This means

$\mathbb P(X>3)=\mathbb P(Z>2)\approx0.025$

6 0

4 years ago

Please help me with this (20 points)

zubka84 [21]

Answer:

x³-2x²-22x-21

Step-by-step explanation:

(x+3) (x²-5x-7)

x³-5x²-7x+3x²-15x-21

x³-2x²-22x-21

6 0

3 years ago

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PLEASE HELP ME ON THIS IT IS GEOMETRY PLEASE HELP ME DO NOT WASTE MY ANSWERS PLEASE HELP ME

sweet-ann [11.9K]

It’s hard to tell because there isn’t a visual. My guess is that it’s ASA~ and SAS~ because T is congruent to P and A and F have the same angle

5 0

3 years ago