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Stella [2.4K]
3 years ago
7

An envelope is 3 inches wide with a total area of 30 square inches. What is height?

Mathematics
2 answers:
lord [1]3 years ago
5 0
The answer would be ten because 3 times ten is thirty and ten divided by three is ten
solniwko [45]3 years ago
3 0
Since the TOTAL area is 30 square inches, what you would do is divide 30/3, since you already know how wide it is. And the answer is 10. The envelope is 10 inches tall.
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The quotient of 20 and 3 more than x is 4. Find x.
tigry1 [53]

Answer:

x=2

Step-by-step explanation:

Quotient means division

20/(x+3) =4

Multiply each side by (x+3)

(x+3)*20/(x+3) =4(x+3)

20 = 4(x+3)

Divide each side by 4

20/4 = 4(x+3)/4

5 = x+3

Subtract 3 from each side

5-3 = x+3-3

2 =x

4 0
3 years ago
Read 2 more answers
How do i do 56 1/4% it's a mixed fraction with a percent?
Pepsi [2]
Answer: 56 1/4 %  = 52.25 % = 52.25 /100 = 0.5225 
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4 0
3 years ago
Delta makes 12-volt car batteries. These batteries are known to be normally
blondinia [14]

Answer:

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given that the sample size n =12 -volt car batteries</em>

<em>Let  'X' be a Random variable in a normal distribution</em>

<em>Given that mean of the normal distribution = 45 months</em>

<em>Given that the Standard deviation of the normal distribution = 8months</em>

<u><em>Step(ii):-</em></u>

Let  X₁ = 3 years = 12 × 3 = 36 months

Z_{1} = \frac{x_{1} -mean}{S.D} = \frac{36-45}{8} = -1.125

Let X₂ = 4 years  = 12 × 4 = 48 months

Z_{2} = \frac{x_{2} -mean}{S.D} = \frac{48-45}{8} = 0.375

<u><em>Step(iii)</em></u>:-

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = P(-1.125≤Z≤0.375)

                   = P(Z≤0.375) - P(Z≤-1.125)

                   = 0.5 +A(0.375) - (0.5-A(1.125)

                   = 0.5 + 0.1480 - (0.5 -0.3708)

                  = 0.1480 + 0.3708

                 = 0.5188

<u><em>Final answer:-</em></u>

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

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5 0
3 years ago
A fair coin is flipped eight times. What is the probability of the coin landing heads up exactly 2 times?
dimulka [17.4K]

Answer:

50%

Step-by-step explanation:

no matter how many times it is flip you will get heads or tails.

8 0
3 years ago
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Holly has 56 peices of paper and 8 paper clips. If she clips the same amount of paper together with each paper clip, how many pe
dedylja [7]

Answer:

56/8 = 7 pieces of paper

Step-by-step explanation:

3 0
2 years ago
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