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Bumek [7]
3 years ago
11

What two numbers add up to 1 but multiply to -2

Mathematics
1 answer:
Minchanka [31]3 years ago
3 0
Negative 1 and positive 2 will add up to 1 and will multiply to -2.

-1 + 2 =  1

-1 * 2 = -2

The two numbers are -1 and 2.
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The tensile strength of a metal part is normally distributed with mean 40 pounds and standard deviation 5 pounds. If 50,000 part
nalin [4]

Answer:

a) how many would you expect to fail to meet a minimum specification limit of 35-pounds tensile strength?

7933 parts

b) How many would have a tensile strength in excess of 48 pounds?

2739.95 parts

Step-by-step explanation:

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

a) how many would you expect to fail to meet a minimum specification limit of 35-pounds tensile strength?

z = (x-μ)/σ

x = 35 μ = 40 , σ = 5

z = 35 - 40/5

= -5/-5

= -1

Determining the Probability value from Z-Table:

P(x<35) = 0.15866

Converting to percentage = 15.866%

We are asked how many will fail to meet this specification

We have 50,000 parts

Hence,

15.866% of 50,000 parts will fail to meet the specification

= 15.866% of 50,000

= 7933 parts

Therefore, 7933 parts will fail to meet the specifications.

b) How many would have a tensile strength in excess of 48 pounds?

z = (x-μ)/σ

x = 48 μ = 40 , σ = 5

z = 48 - 40/5

z = 8/5

z = 1.6

P-value from Z-Table:

P(x<48) = 0.9452

P(x>48) = 1 - P(x<48)

1 - 0.9452

= 0.054799

Converting to percentage

= 5.4799%

Therefore, 5.4799% will have an excess of (or will be greater than) 48 pounds

We are asked, how many would have a tensile strength in excess of 48 pounds?

This would be 5.4799% of 50,000 parts

= 5.4799% × 50,000

= 2739.95

Therefore, 2739.95 parts will have a tensile strength excess of 48 pounds

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What is the answer for -2(x-7) + 10x=34
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Answer:

Step-by-step explanation:

-2x-14+10x=34

8x-14=34

8x=48

x=6

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shusha [124]

I am pretty sure 52 degrees

7 0
3 years ago
Read 2 more answers
Explain the answer and I'll add you as brand list
choli [55]

Answer:

how to find it out

Step-by-step explanation:

on the line that starts at x=-6 and ends at x=6.Find the spot where the y value is the highest

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