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masya89 [10]
3 years ago
13

I will give Brainliest!!!

Mathematics
1 answer:
mixer [17]3 years ago
3 0

Answer: C

Step-by-step explanation:

x = 2\sqrt{y+2} - 6

x + 6 = 2\sqrt{y+2}

((x+6)/2 = \sqrt{y+2} )^2

(x+6/2)^2 = y+2

y = (x+6/2)^2 -2

y= 1/4x^2 +3x +7

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            2 × 3 + 9 > 0; correct !
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Sarah was raising money for a fundraiser. Her fundraising goal was $40. What would 50% of her fundraising goal be??
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5 0
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Read 2 more answers
The mean of a list of test scores is 80. Adding an additional test score of 92 caused the mean to rise to 82. After this additio
miv72 [106K]

Answer:

6

Step-by-step explanation:

The mean of a list of test scores is 80

Adding an additional test score of 92 caused the mean to rise to 82

To find:

After this additional, how many total test are in the list ?

Solution:

Let the total number of test at first = n

And sum of total score = S

As we know, mean = \frac{sum \ of \ total \ observation}{number\  of \ total\  observation}

                    80= \frac{S}{n} \\

Multiplying both sides by n

80n=S

Now, as adding an additional test score of 92 caused the mean to rise to 82,

S+92=82\times(n+1)\\80n +92 = 82n+82           \  (given \ S =80n)

80n-82n =82-92\\-2n=-10

By dividing both sides by minus ( - )

2n =10

By dividing both sides by 2

n =5

Thus, total number of test at first = n = 5

And, after this additional score added, total number of tests are n+1=6

4 0
3 years ago
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