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Naddik [55]
2 years ago
10

I need help with this please

Mathematics
1 answer:
Westkost [7]2 years ago
8 0

Answer:

This alot but ill help you with 2 of them to learn em

Step-by-step explanation:

1) 2x^2 +5 =167

Subtract the 5 from both sides to get the equation 2x² = 162

Then divide the 2 from both sides to get x² = 81, Then square root from both sides to get x= 9

6) 2(2y +4)²=72

Divide 2 from both sides to get (2y+4)²=36

Then square root that to get 2y+4 = 6

subtract 4 from both sides to get 2y =2

Then divide both sides from 2. Y=2

You might be interested in
What is 15/20 as a percent
finlep [7]
75%         you find this by dividing 15 by 20 then multiplying the answer by 100

15 / 20 = .75

.75 x 100 = 75

15/20  = 75% of 100
4 0
4 years ago
What is the inverse of the function f(x) = 2x – 10?
strojnjashka [21]

Answer:

see explanation

Step-by-step explanation:

let y = f(x) then rearrange making x the subject

y = 2x - 10 ( add 10 to both sides )

y + 10 = 2x ( divide both sides by 2 )

\frac{y+10}{2} = x

Change y back into terms of x

f^{-1} (x) = \frac{x+10}{2}

6 0
3 years ago
K · (3.2 ÷ 4) = 1.6<br><br> k =
SVEN [57.7K]
K=2. You have to divide 3.2 by 4, then divide both sides by 0.8, finally, you have your answer, K=2.
3 0
3 years ago
An article reports that blue eyed people earn less than brown eyed people, with these numbers: average blue-eyed salary $35,000,
stepladder [879]

Answer:

There is not enough evidence to support the claim that blue eyed people earn less than brown eyed people.

Step-by-step explanation:

In this case, we need to test whether the blue eyed people earn less than brown eyed people.

Let sample 1 denote the salary of blue eyed people and sample 2 denote the salary of brown eyed people.

The hypothesis to test the claim can be defined as follows:

<em>H₀</em>: The average salary of blue eyed people is not less than that for brown eyed people, i.e. <em>μ</em>₁ - <em>μ</em>₂ ≥ 0.

<em>Hₐ</em>: The average salary of blue eyed people is less than that for brown eyed people, i.e. <em>μ</em>₁ - <em>μ</em>₂ < 0.

It is provided that the <em>p</em>-value of the test is, <em>p</em>-value = 0.45.

The decision rule is:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

The <em>p</em>-value of the test is 0.45.

The <em>p</em>-value of the test is very large for all the commonly used significance level. The null hypothesis will not be rejected.

Thus, it can be concluded that there is not enough evidence to support the claim that blue eyed people earn less than brown eyed people.

3 0
3 years ago
Find the quotient 8/1 ÷ 3/5
den301095 [7]
13 1/3 is the answer, or in mixed numbers should be 40/3
5 0
3 years ago
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