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Alex17521 [72]
3 years ago
13

Simplify the following expression : (2x + 7y) (x – 3y) – (9x + 4) (3x - 2)

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
8 0
-25x^2+xy-21y^2+6x+8
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Suppose that many large samples were taken from population A, which is normally distributed, and population c, which is not norm
OLEGan [10]

Answer:

Population A

Step-by-step explanation:

Think about. If population A already known for normally distribution AND you take large samples. The rest would still be distributed, Which keeps population A a Normal Distribution.

but Population C is nor normally distributed, so if you take away large samples. it will deteriorate its distribution so it won't get any better or in this case, normal. so. it is Population A.

4 0
3 years ago
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4. Joe received an hourly wage of $8.15. His boss gave him a 7% raise. How much does Joe make per hour now?
Olenka [21]

Answer:

$ 8.72

Step-by-step explanation:

  • How much does Joe make per hour now?

$8.15 + 7%·$8.15 =

= $8.15 + 7×8.15/100

= $8.15 + $57.05/100

= $8.15 + $0.57

= $ 8.72

5 0
4 years ago
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1. A farmer estimates her hens will produce
a_sh-v [17]

Answer:

Expected profit per dozen eggs = 4 ¢

Expected profit on the total egg production = 60,000 ¢

Step-by-step explanation:

Complete table as obtained online

Net Profit | 8 | 6 | 4 | 2 | 0 | -2

Probability |0.1|0.4|0.2|0.1|0.1|0.1

a) Expected profit per dozen eggs

Expected value is given as

E(X) = Σ xᵢpᵢ

xᵢ = each variable

pᵢ = probability of each variable

E(X) = (8×0.1) + (6×0.4) + (4×0.2) + (2×0.1) + (0×0.1) + (-2×0.1) = 4 ¢ per dozen

b) Expected profit on the total egg production

Last year, she had 12,000 dozen eggs

This year, she estimates 3,000 dozen more eggs

Estimated Total egg production this year = 12000 + 3000 = 15,000 dozen eggs

Expected profit per dozen eggs = 4 ¢

Expected profit on 15,000 dozen eggs = 15000 × 4 = 60,000 ¢

Hope this Helps!!!!

5 0
3 years ago
Using a number cube and a
victus00 [196]

Answer:

1/12

Step-by-step explanation:

The probability of landing on tail = 1/2

The probability of rolling a 3 = 1/6

The probability of doing BOTH is 1/2 x 1/6 = 1/12

5 0
3 years ago
Chris bought clothes for school. She bought 3 shirts for $12 each and a skirt for $15. How much money did Chris spend on her new
ollegr [7]

Answer:

Christ spent $51 on her new school clothes.

Step-by-step explanation:

12 * 3 = 36

36 + 15 = 51

3 0
3 years ago
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