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Deffense [45]
2 years ago
5

Maggie's brother is 10 years younger than twice her age. The sum of their ages is 32.

Mathematics
1 answer:
mixas84 [53]2 years ago
5 0

Answer:22

Step-by-step explanation:

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Jessica is asked to write a quadratic equation to represent a function that goes through the point (8, –11) and has a vertex at
vesna_86 [32]

the answer is c. I just did the review

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How would you symplify 5 and the square root of 90?<br><br> Please show steps
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First you have to find the square root of 90 which is about 9.5
now multiply, divide, add, or subtract 5 from 9.5 to get your answer.
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3 years ago
HELP ME PLEASE!!! This is my last day
KiRa [710]

Answer:

  1. B : 91.25,  V: 365
  2. B:12.25,  V: 42.875
  3. B:28.4,  V: 142
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7 0
3 years ago
A factory sells backpacks for $35 each. The cost to make 1 backpack is $15. In addition to the cost of making backpacks, the fac
Otrada [13]

Answer:9400 backpacks

\geqStep-by-step explanation

since the number of packs to be sold in a  is represented by x,

selling price for 1 week = 35x

cost price for 1 week = 15x

profit = 35x-15x = 20x

additional cost of production = 11,000

this implies that 20x - 11,000 \geq 7800

20x - 11,000 \geq 7,800

20x \geq 7800+ 11000

20x \geq 18,800

x \geq 18800/2

x \geq 9,400

at least 9,400 packs have to be sold each week to make a profit of $7800

7 0
3 years ago
The American Bankers Association reported that, in a sample of 120 consumer purchases in France, 48 were made with cash, compare
tatuchka [14]

Answer:

Step-by-step explanation:

Hello!

You have the information for two variables

X₁: Number of consumer purchases in France that were made with cash, in a sample of 120.

n₁= 120 consumer purchases

x₁= 48 cash purchases

p'₁= 48/120= 0.4

X₂: Number of consumer purchases in the US that were made with cash, in a sample of 55.

n₂= 55 consumer purchases

x₂= 24 cash purchases

p'₂= 24/55= 0.4364

You need to construct a 90% CI for the difference of proportions p₁-p₂

Using the central limit theorem you can approximate the distribution of both sample proportions p'₁ and p'₂ to normal, so the statistic to use to estimate the difference of proportions is an approximate standard normal:

[(p'₁-p'₂) ± Z_{1-\alpha /2} * \sqrt{\frac{p'_1(1-p'_1)}{n_1} +\frac{p'_2(1-p'_2)}{n_2} }]

Z_{0.95}= 1.648

[(0.4-0.4364)±1.648 * \sqrt{\frac{0.4(1-0.4)}{120} +\frac{0.4364(1-0.4364)}{55} }]

[-0.1689;0.0961]

The interval has a negative bond, it is ok, keep in mind that even tough proportions take values between 0 and 1, in this case, the confidence interval estimates the difference between the two proportions. It is valid for one of the bonds or the two bonds of the CI for the difference between population proportions to be negative.

I hope this helps!

8 0
3 years ago
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