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Masja [62]
3 years ago
5

On a standardized exam, the scores are normally distributed with a mean of 120 and

Mathematics
1 answer:
Ierofanga [76]3 years ago
6 0

Answer: z= -0.5

Step-by-step explanation: mean m=120 and deviation s=10.

Z = (x-m)/s= (115-120)/10

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Every 2.5 hours, a machine produces 150 baskets.
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Chapter : Algebra

Study : Math in Junior high school

x = 7 + √40

find √x of √x + 1

= √x + 1

= √(7+√40) + 1

in Formula is :

= √7+√40 = √x + √y

= (√7+√40)² = (√x + √y)²

= 7+√40 = x + 2√xy + y

= 7 + √40 = x + y + 2√xy

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substitution Equation 1 to 2 :

= xy = 10

= x(7-x) = 10

= 7x - x² = 10

= x² - 7x + 10 = 0

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= x = 5 or x = 2

Subsitution x = 5 and x = 2, to equation 1

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= y = 7 - x

= y = 7 - (5)

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#Equation 1 :

= x = 5 and y = 2

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15 ÷ 3 = Δ
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this is the answer

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