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Ksenya-84 [330]
4 years ago
15

HELP IM TIMED!!!!!!!!

Mathematics
1 answer:
OverLord2011 [107]4 years ago
4 0

There is absolutely no correlation between the variables.

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Solve the following equation 7a-9=12​
mixas84 [53]

7a-9=12

Add 9 to both sides:

7a= 21

Divide both sides by7

A= 3

6 0
4 years ago
Read 2 more answers
HOW DO I SOLVE THIS PLEASE HELP
malfutka [58]

Answer:

  x = 15

Step-by-step explanation:

We assume you want to find the value of x.

Know (or prove) that in this geometry, all of the right triangles are similar. That means the ratios of corresponding sides are proportional.

  short side / hypotenuse = 9/x = x/25

  x^2 = (9)(25) . . . . . . . . . . multiply by 25x ("cross multiply")

  x = √((9)(25)) = (3)(5) . . . take the square root

  x = 15

3 0
3 years ago
Two construction contracts are to be randomly assigned to one or more of three firms: I, II, and III. Any firm may receive both
vichka [17]

Answer:

The owner's total profit is $120,000.

Step-by-step explanation:

Assume that:

<em>X</em>₁ = contract is assigned to firm 1

<em>X</em>₂ = contract is assigned to firm 2

The sample space for assigning the two contracts is:

S = {(I, I), (I, II), (I, III), (II, I), (II, II), (II, III), (III, I), (III, II) and (III, III)}

There are total of 9 possible combinations.

So, the probability of selecting any of the combination is, 1/9.

Compute the probability distribution of <em>X</em>₁ and <em>X</em>₂ as follows:

<em>X</em>₁      P (<em>X</em>₁)                      <em>X</em>₂        P (<em>X</em>₂)

0        4/9                        0           4/9

1         4/9                        1            4/9

2         1/9                        2           1/9

Compute the expected values of <em>X</em>₁ and <em>X</em>₂ as follows:

E(X_{1})=\sum X_{1}\cdot P(X_{1})\\\\=(0\times\frac{4}{9})+(1\times\frac{4}{9})+(2\times\frac{1}{9})\\\\=\frac{6}{9}\\\\=\frac{2}{3}               E(X_{2})=\sum X_{2}\cdot P(X_{2})\\\\=(0\times\frac{4}{9})+(1\times\frac{4}{9})+(2\times\frac{1}{9})\\\\=\frac{6}{9}\\\\=\frac{2}{3}

It is provided that each contract will yield a profit of $90,000.

Compute the owner's total profit as follows:

\text{Total Profit}=\text{Profit}\times [E(X_{1})+E(X_{2})]

                   =90000\times[\frac{2}{3}+\frac{2}{3}]\\\\=120000

Thus, the owner's total profit is $120,000.

7 0
3 years ago
A) What equation is used to find the vertex form of a parabola with the vertex (h, k)?
VikaD [51]
Y=ax2+bx+c . In this equation, the vertex of the parabola is the point (h,k) . You can see how this relates to the standard equation by multiplying it out: y=a(x−h)(x−h)+ky=ax2−2ahx+ah2+k .
4 0
4 years ago
How can polygons be considered a subcategory of two-dimensional figures?
Sonbull [250]
I say subcategory would be a good answer
6 0
3 years ago
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