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Lilit [14]
1 year ago
10

Use the following information to find your final course average in grading system 2test grades ( 75, 82, 88, 70)final exam grade

= 85projects=85homework=90class participation=80
Mathematics
1 answer:
DochEvi [55]1 year ago
5 0

test grades: 75, 82, 88, 70

Average = Total sum of all numbers/number of item in the set

Total sum of all numbers = 75 + 82+ 88 + 70 = 315

number of item in the set = 4

Average = 315/4 = 78.75

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henry is mixing concrete. to make concrete he needs to mix cement, sand and gravel in the ratio 5 : 4 : 1 by weight. henry needs
MaRussiya [10]

Answer:

cement by 5 Kg

Step-by-step explanation:

add the parts of the ratio, 5 + 4 + 1 = 10 parts

Divide the quantity of concrete by 10 to find the value of one part of the ratio.

110Kg ÷ 10 = 11Kg ← value of 1 part of ratio , thus

5 parts = 5 × 11Kg = 55Kg ← cement required

4 parts = 4 × 11Kg = 44Kg  ← sand required

1 part = 11Kg ← gravel required

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He requires 44Kg of sand and has 55Kg

He requires 11Kg of gravel and has 15Kg

Thus he is 5Kg short of cement.

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3 years ago
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3 years ago
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Elza [17]
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(–4c2 + 7cd + 8d) + (–3d + 8c2 + 4cd) =
BabaBlast [244]

Answer:

4c² + 11cd + 5d

Step-by-step explanation:

(–4c2 + 7cd + 8d) + (–3d + 8c2 + 4cd)

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8c²-4c²+7cd + 4cd + 8d - 3d

= 4c² + 11cd + 5d

4 0
2 years ago
Read 2 more answers
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