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3 years ago

Please HELP ME!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

horsena [70]3 years ago

6 0

-4^3
a^3 r^2
Just add all the letters\numbers and the exponent will be how many of the numbers there are

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A painter works 37.5 hours one week. If she worked 5 days, how many hours did she work on average per day? At $15.75 per hour, h

Lyrx [107]

She worked 7.5 hours a day on average. You can get this by dividing the 37.5 by 5.

And the average she made was 118.13 when rounded. You can get this by multiplying the 7.5 by the rate

8 0

3 years ago

9 to the second power multiply by 3 to the 6 power =3 to the ? power

GenaCL600 [577]

Answer:

Step-by-step explanation:

$a^{m}$ × $a^{n}$ = $a^{m+n}$

$(a^{m})^{n}$ = $a^{mn}$

~~~~~~~~~~~~~

$9^{2}$ × $3^{6}$ = (3²)² × $3^{6}$ = $3^{2*2+6}$ = $3^{10}$

7 0

3 years ago

Calculate the area of the regular pentagon below:

djverab [1.8K]

Assuming the vertex of the triangle shown is the center of the pentagon, and the line segment shown is an altitude of the triangle:

If we join the center of (the circumscribed circle and of) the pentagon to the 5 vertices, 5 isosceles triangles are formed, all congruent to the one shown in the figure. It is clear that these triangles are congruent, so to find the area of the pentagon, we find the area of one of these triangles and multiply by 5.

The base of the triangle is 22.3 in, and the height is 15.4 ins, thus the area of the pentagon is:

5(Area triangle)=5*[(22.3*15.4)/2]=858.55 (square inches).

Answer: 858.55 (square inches).

7 0

3 years ago

The probability distribution for the random variable x follows. x f(x) 20 0.20 25 0.15 30 0.30 35 0.35 (a) Is this probability d

Damm [24]

Answer:

(a) The probability distribution is valid.

(b) The probability that x = 30 is 0.30.

Step-by-step explanation:

The probability distribution of the random variable X is:

x: 20 | 25 | 30 | 35

f (x): 0.20 | 0.15 | 0.30 | 0.35

(a)

The properties of a probability distribution are:

0 ≤ P (X) ≤ 1
∑ P (X) = 1

All the probability value are more than 0 and less than 1.

Compute the sum of all the probabilities as follows:

$\sum P(X)=0.20+0.15+0.30+0.35=1$

The sum of all probabilities is 1.

Thus, the probability distribution is valid.

(b)

Consider the probability distribution table.

The probability of X = 30 is,

P (X = 30) = 0.30.

Thus, the probability that x = 30 is 0.30.

6 0

3 years ago

PLEASE HELP ASAP !!!!!!!!

AnnyKZ [126]

Answer: 7°

Explanation:

FBD = EBC
2x + 3 = 9x - 11
-7x = -14
x = -14/-7
x = 2

EBC = 9(2) - 11 = 18 - 11 = 7°

7 0

3 years ago

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