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MA_775_DIABLO [31]
3 years ago
9

The mean of Fred’s grades on five tests was 75.2. The grades on the first 4 of these tests were 87, 84, 88, and 45. Find the gra

de on his fifth test.
Mathematics
2 answers:
love history [14]3 years ago
7 0

Answer:

72

Step-by-step explanation:

mean x number of total test scores -> 75.2 x 5=376

sum of the four test scores given -> 304

difference of the two numbers -> 376- 304= 72

the missing test score, therefore the answer is 72.

kaheart [24]3 years ago
5 0
88+87+84+45 = 304
304+x/5=75.2
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Help pls!!!!! Brainliest goes to first right answer
zepelin [54]

Answer:

96 inch²

Step-by-step explanation:

there are 2 shapes,

1. a square

2. a triangle

lets find the area of the square first,

<u>AREA = SIDE × SIDE</u>

= 8 × 8

= 64 inch²

now, area of triangle ,

area \:  =  \frac{1}{2}  \times base \:  \times height \:

=  \frac{1}{2}  \times 8 \times 8 \\  =  \frac{1}{2}  \times 64 \\  = 32 \:  {inch}^{2}

so, total area is :

area of square + area of triangle

= 64 + 32

= 96 inch²

7 0
3 years ago
Read 2 more answers
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ivann1987 [24]

9514 1404 393

Answer:

  • large: 55 lb
  • small: 30 lb

Step-by-step explanation:

Let x and y represent the weights of the large and small boxes, respectively. The problem statement gives rise to the system of equations ...

  x + y = 85 . . . . . combined weight of a large and small box

  70x +50y = 5350 . . . . combined weight of 70 large and 50 small boxes

We can subtract 50 times the first equation from the second to find the weight of a large box.

  (70x +50y) -50(x +y) = (5350) -50(85)

  20x = 1100 . . . . simplify

  x = 55 . . . . . . . divide by 20

Using this in the first equation, we can find the weight of a small box.

  55 +y = 85

  y = 30 . . . . . . . subtract 55

A large box weighs 55 pounds; a small box weighs 30 pounds.

4 0
2 years ago
Find the distance between (-4,6) and (3,-7)
Natali5045456 [20]

Answer:

4-6 is 2 and 3-7 is 4

Step-by-step explanation:

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8 0
3 years ago
Mikey has $100 to spend on books. She wants to buy at least 14 books. Hardback books cost $15.00 and paperback books cost $7.00.
fomenos
A. x+y<100
15x+7y>14 is the right answer
8 0
3 years ago
to raise money for her school field trip, Jane is selling candles. She has a large cancel for $8, and a small candle for $5. If
Fed [463]

Answer:

  • 45 large candles
  • 53 small candles

Step-by-step explanation:

Let c represent the number of large candles Jane sold. Then 98-c is the number of small candles. Her revenue is ...

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  3c + 490 = 625 . . . . . . eliminate parentheses, collect terms

  3c = 135 . . . . . . . . . . . . subtract 490

  c = 45 . . . . . . . . . . . . . . divide by 3

Jane sold 45 large candles and 98-45 = 53 small candles.

7 0
3 years ago
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