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Wittaler [7]
3 years ago
6

Find the product of (7x-3)(2x 4)

Mathematics
1 answer:
boyakko [2]3 years ago
5 0
What's the operation between 2x and 4
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There are 30 nonfiction books and 34 fiction books in the teachers collection. Which of the following expresses the ratio of fic
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Divide each by 2 and you get 15:16
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3 years ago
If 28% of students in College are near-sighted, the probability that in a randomly chosen group of 20 College students, exactly
cluponka [151]

Answer: (D) 16%

Step-by-step explanation:

Binomial probability formula :-

P(x)=^nC_xp^x(1-p)^n-x, where n is the sample size , p is population proportion and P(x) is the probability of getting success in x trial.

Given : The proportion of students in College are near-sighted : p= 0.28

Sample size : n= 20

Then, the the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is given by :_

P(x=4)=^{20}C_4(0.28)^4(1-0.28)^{20-4}\\\\=\dfrac{20!}{4!16!}(0.28)^4(0.72)^{16}\\\\=0.155326604912\approx0.16\%

Hence, the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is closest to 16%.

7 0
3 years ago
Which is the correct answer ?????
Damm [24]
<h3>Answer:  True</h3>

Explanation:

Technically you could isolate any variable you wanted, from either equation. However, convention is to pick the variable in which isolating it is easiest, and most efficient.

The key thing to look for is if there's a coefficient of 1. This is found in the second equation for the y term. Think of -4x+y = -13 as -4x+1y = -13. Due to the coefficient of 1, when solving for y we won't involve messy fractions.

If you were to solve for y, then you'd get y = 4x-13, which is then plugged in (aka substituted) into the first equation. That allows you to solve for x. Once you know x, you can determine y.

6 0
1 year ago
if 129.5 meters of cable connected the boat to the parasail, approximately how many meters above the lake was the man?
tiny-mole [99]
Your answer will be 2
7 0
3 years ago
Read 2 more answers
Pre cal help??????????
klasskru [66]
I believe it's the last one, but it's a matrix not a vector as the question asks
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3 years ago
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