MATHEMATICS MIDDLE SCHOOL

A cell phone company orders 500 new phones from a manufacturer. If the probability of a phone being defective is 2.9%, predict how many of the phones are likely to be defective. Round to the nearest whole number. 12 phones 15 phones 18 phones 145 phones

Answers

Answer 1
Answer:

Answer:

15 phones, option B.

Step-by-step explanation:

A cell phone company orders new phones = 500

The probability of a phone  is being defective = 2.9%

2.9% of 500 phones are = (2.9)/(100) × 500

0.029 × 500 = 14.5 rounded to the nearest whole number is 15

The probability of 15 phones are defective out of 500 phones.
Answer 2
Answer: 500  x 0.029 = 14.5 

answer
about 15 phones 

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Sandy orders 20 bread rolls for her party and three fifths of the rolls are whole wheat.What other fraction can represent the part of the rolls that are whole wheat?

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If you multiply both the numerator and the denominator by 4 then 3/5 is equal to 12/20
The fraction that can represent the wheat portion is 3/5

Mrs. Ishimitsu is installing a rubber bumper around the edge of her coffee table. The dimensions of the rectangular table are (2x2 – 16) feet and (–x2 + 4x + 1) feet. Which expression represents the total perimeter of the table, and if x = 3, what is the length of the entire rubber bumper?

Answers

Answer:

P = 2x² + 8x - 30

P = 12 (if x = 3)

Step-by-step explanation:

Perimeter Formula: 2l + 2w

Step 1: Find perimeter

2(2x² - 16) + 2(-x² + 4x + 1)

4x² - 32 - 2x² + 8x + 2

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Step 2: Plug in x = 3

2(3)² + 8(3) -30

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12

The solution set for the inequality x + 4 ≤ 1/2 (x - 3) includes -11 as an element.

Answers

Answer:

x ≤ -11, Yes. The solution set include -11.

Step-by-step explanation:

x+4\leq(1)/(2)(x-3)\qquad\text{multiply both sides by 2}\n\n2x+8\leq1(x-3)\n\n2x+8\leq x-3\qquad\text{subtract 8 from both sides}\n\n2x\leq x-11\qquad\text{subtract x from both sides}\n\n\boxed{x\leq-11}

Write the name of the period that has the digits 145 of 145,973

Answers

This is the: Thousands period.
this is the thousands period

Is 2750 a reasonable answer for 917 x 33?

Answers

line them up on top of each other so it would be 30,261 so you were close but you have to line them up correctly

What is 119 times 31%

Answers

Answer:

61.69?

Step-by-step explanation:

Are you asking what 31% of 119 is? If so, then the answer would be 61.69.

Because (119)0.31=61.69

(To make a percent, you take a decimal out of 1, and multiply. 0.31 would be 31, because we would multiply it by 100, becuase you can only get to 100%. Then you woukd do the opposite, reverse it by dividing by 100. Which then, you would get 0.31)

Hope that helped.
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