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kotegsom [21]
2 years ago
5

Going into the final exam, which will count as 1/3 of the final grade, Megan had test scores of 94, 81, 87, and 93. What score d

oes Megan need on the final exam in order to have an average of 90?
Mathematics
1 answer:
sergeinik [125]2 years ago
3 0

9514 1404 393

Answer:

  92.5

Step-by-step explanation:

The total of Megan's scores is ...

  94 +81 +87 +93 = 355

so her current average is 355/4 = 88.75

The score (s) Megan needs for a 90 average is ...

  (2/3)(88.75) +(1/3)s = 90

  2(88.75) +s = 270 . . . . . . . . multiply by 3

  s = 270 -177.5 = 92.5

Megan needs a score of 92.5 on her final to have an overall average of 90.

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SIZIF [17.4K]

I believe it would be D

3 0
2 years ago
For what values of x is the expression below defined?<br> Look at the picture(15 points)
Leya [2.2K]

Answer:

D. -5 <= x < 1

Step-by-step explanation:

the values under the square-root radical must not be negative, AND

the value of the denominator must not be 0 or negative

x+5 >=0  or x >= -5

and 1-x > 0 or x < 1

So the answer is -5 <= x < 1

4 0
3 years ago
HELP ME PLEASE !!!!!!!!
anzhelika [568]

Answer:

the second one is the answer

8 0
2 years ago
Read 2 more answers
The total simple interest on $1600 invested for five years is $224. What is the percentage rate per annum?
mash [69]

Answer:

The percentage rate per annum is 2.8%

Step-by-step explanation:

We need to multiply the principal by the time, then divide the interest by the product of P×T, so:

1,600 × 5 = 8,000

224 ÷ 8,000 = 0.028

Then we convert our final product to a percentage.

0.028 to a percent is 2.8%

6 0
2 years ago
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Write the equation in point slope intercept form of the line that passes through (6,-11) and is parallel to the graph of y=-2/3x
Alina [70]

Answer:

y+11=-2/3(x-6)

Step-by-step explanation:

To find the parallel line, we would just plug in the numbers in the point-slope form from what we're given. We have y=-2/3x+12 and (6,-11).

Point-slope form:

y-y1=m(x-x1) → y+11=-2/3(x-6)

m represents the slope, which is -2/3 in this situation.

y1 represents the y coordinate, which is -11 in this situation. However, when we plug in negative numbers in a point-slope form, we would do the opposite of the negative number, which is to make it a positive in point-slope form.

x1 represents the x coordinate, which is 6 in this situation.

8 0
3 years ago
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