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Hunter-Best [27]
4 years ago
14

Plzz help me. The question is in the picture below

Mathematics
1 answer:
aev [14]4 years ago
3 0

Answer:

3

Step-by-step explanation:

A = bh\\165 = 11(12+x)\\15 - 12 = x \\3 = x

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How to solve x(x-3)=0
damaskus [11]

Step-by-step explanation:

x(x-3)=0

x=0 or (x-3) =0

x= 0 or x =3

7 0
4 years ago
The following table shows the probability of rolling the numbers 1 through 7
Marysya12 [62]

Answer:

2.0

Step-by-step explanation:

Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die

The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)

The first moment (AKA the average is..)

\frac{1+2+3+4+5+6+7}{7}=4

The second moment is..

\frac{1^2+2^2+3^2+4^2+5^2+6^2+7^2}{7}=20

\sqrt{20-4^2}=2

4 0
3 years ago
A plumber charges a flat fee of $30 to come to the house then $18 per hour. Write an equation that shows how to determine the to
konstantin123 [22]

Answer:

18x+30

Step-by-step explanation:this should be it

5 0
4 years ago
Complete the truth table.
Elza [17]

Answer:

TTTTTTTFFFFFFFFTTTTTTTTFFFFFFFF

7 0
3 years ago
You are constructing a metal border of uniform width for a rectangular wall mirror that measures 20 inches by 24 inches. You hav
kirill115 [55]

Answer:

The frame will be 4 inches in width

Step-by-step explanation:

The length of the outside is 24+2x

The width of the outside is 20+2x

(24+2x)(20+2x) - 20(24) = 416

480 + 40x + 48x + 4x2 - 480 = 416

4x2 + 88x - 416 = 0

x2 + 22x - 104 = 0

(x+26)(x-4) = 0

x = -26 or x=4

The frame will be 4 inches in width

6 0
2 years ago
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