3 years ago

Help with direct variations

Mathematics

1 answer:

Alla [95]3 years ago

4 0

1 variation is good and the other is bad

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If a/\2+1/a/\2=11, then a+1/a=?

Nadya [2.5K]

Answer:

$\pm \sqrt{13}$

Step-by-step explanation:

$\bigg(a + \frac{1}{a} \bigg)^{2} = {a}^{2} + \frac{1}{ {a}^{2} } + 2 \times a \times \frac{1}{a} \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 11 + 2 \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 13 \\ \\ \bigg(a + \frac{1}{a} \bigg) = \pm \sqrt{13}$

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3 years ago

Jon invests $4,100 into an account that pays 5 percent simple interest each year.what is the total balance in the account after

AlladinOne [14]

% Interest = 5%
Principal Amount = $4100
Period Of Pay = 3 yrs

Interest Amount
5/100 × 4100 × 3
=615

Amount After Interest
4100 + 615 = 4715

Answer = 4715

7 0

3 years ago

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In ABC, BC = a = 16, AC = b = 10, and m<C = 22º. Which equation can you use to find the value of c = AB?

AnnyKZ [126]

Answer:

10 times 16 = C

Step-by-step explanation:

c2 = a2 + b2 − 2ab cos C = 162 + 102 − 2(10)(16) cos 22°

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3 years ago

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storchak [24]

Answer:

the awnser is b

Step-by-step explanation:

all you have to do is put 45 over 100 to get that percentage

4 0

3 years ago

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For a random sample of children from a school district in South Carolina, a regression analysis is conducted of yequalsamount s

AveGali [126]

Answer:

Option B. Standard error of predicted amount.

Step-by-step explanation:

A standard error predicted amount will work best in this scenario. The data, when extracted from the standard mean, provides the most accurate presentation of the statistical data on question. By using the standard error, the variation from the central point can be determined.

3 0

3 years ago