All categories

2 years ago

Help meee please i need help

Mathematics

2 answers:

Dmitriy789 [7]2 years ago

6 0

Answer:

81pi

Step-by-step explanation:

You are asking yourself the area of pi*r^2 could with r as 9. pi*9^2. solve and you get 81pi :D

Talja [164]2 years ago

5 0

The answer is 81 pi (81 3.14)

You might be interested in

What is the answer and how did you work it out

Anna71 [15]

Answer: b

Step-by-step explanation:

10 x 10= 100

15 x 10= 150

100+150= 250

8 0

3 years ago

Which ordered pair is a solution to the system of equations?

tatyana61 [14]

2x - y = -2 . . . (1)
5x - 2y = -7 . . . (2)
From (1), y = 2x + 2 . . . (3)
Putting (3) into (2), gives:
5x - 2(2x + 2) = -7
5x - 4x - 4 = -7
x - 4 = -7
x = -7 + 4 = -3
y = 2(-3) + 2 = -6 + 2 = -4.

Therefore, the required answer is (-3, -4)

6 0

3 years ago

Read 2 more answers

15 points! What is the scale factor of the dilation?

maw [93]

Answer: $\frac{1}{2}$

Step-by-step explanation:

Use the formula for calculate the distance between two points:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Calculate the distance AB. Substitute the coordinates into the formula. Then:

$d_{AB}=\sqrt{(8-0)^2+(8-(-7))^2}$

$d_{AB}=17$

Calculate the distance A'B'. Substitute the coordinates into the formula. Then:

$d_{A'B'}=\sqrt{(2-6)^2+(1-5-(-6))^2}$

$d_{A'B'}=\frac{17}{2}$

As you can see, the distance A'B' is the distance AB multiplied by 1/2. Therefore, this is the scale factor.

5 0

3 years ago

THIS IS DUE TOMORROW ON FRIDAY!<br><br>PLEASE HELP!!

geniusboy [140]

There is the table you just add 12+20the answer add 20 till you are done

3 0

3 years ago

Let x have a normal distribution with mean µ = 30 and standard deviation σ = 10. calculate p(x > 40), and round your answer t

Gnesinka [82]

The random variable X is normally distributed with mean μ=30 and standard deviation σ =10. Use the transformation $\frac{X-\mu}{\sigma}$ for calculating the probability. This value is called Z-score.

The Z score is $Z=\frac{40-30}{10} =1$ .

Refer to the standard normal distribution table.

The probability

$P(X>40)=P(Z>1)=1-P(Z$

8 0

3 years ago