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3 years ago

Which expression is equivalent to-g-7+3g-6

Mathematics

1 answer:

muminat3 years ago

4 0

The answer should be 6a-18 .

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5 Points

Degger [83]

Answer:

(x - 2)² + (y + 3)² = 9

Step-by-step explanation:

(x - h)² + (y - k)² = r²

(x - 2)² + (y - (-3))² = 3²

(x - 2)² + (y + 3)² = 9

4 0

3 years ago

How many elements are there in a power set

Otrada [13]

Answer:

vhhhhjjjjjjj i don't know

6 0

3 years ago

I need help with this question

Mademuasel [1]

Answer:

RQ = 49

Step-by-step explanation:

12/28 = 21/RQ (Ratio of sides of similar triangles are equal)

12 x RQ = 21 x 28

RQ = 588 / 12

RQ = 49

5 0

3 years ago

Can someone help me with the steps to solving<br> 22-5(6v-1)=-63

faust18 [17]

22 - 5(6v - 1) = -63 First, you distribute 5 to the parentheses.

22 - 30v + 5 = -63

27 - 30v = -63

-30v = -90

v = 3

4 0

3 years ago

Product codes of 2, 3, 4, 5, or 6 letters are equally likely. What is the mean and variance of the number of letters in the code

ss7ja [257]

Answer:

$Mean = 4$

$Var = \frac{25}{12}$

Step-by-step explanation:

Given

Codes: 2,3,4,5,6

Required

Determine the Mean and Variance

Equally likely implies that the data follows a uniform distribution.

So,

$Mean = \frac{a+b}{2}$

Where

$a = Lower\ Bound = 2$

$b = Upper\ Bound = 6$

$Mean = \frac{a+b}{2}$

$Mean = \frac{2 + 6}{2}$

$Mean = \frac{8}{2}$

$Mean = 4$

Variance of a uniform distribution is calculated as thus;

$Var = \frac{(b-a+1)^2}{12}$

Substitute values for a and b

$Var = \frac{(6-2+1)^2}{12}$

$Var = \frac{5^2}{12}$

$Var = \frac{25}{12}$

7 0

3 years ago