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Natali [406]
3 years ago
7

Christine took 3 tests and had an average of 76. She has one more test to take and she wants an average of 80. What is the lowes

t score she can get on the last test? 10pts
Mathematics
1 answer:
amm18123 years ago
6 0

Answer: She has to score a minimum of 92 marks to take her average to 80

Step-by-step explanation:

Let the equation be

Three months total = 76 x 3 = 228

(x + 228) / 4 = 80

x + 228 = 80 x 4

x = 320 - 228

x = 92

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Kal is making 3 batches of cookies. Each batch calls for 3/4 cups of sugar. How much sugar will Kal use for all 3 batches?
balu736 [363]

Answer:

2 1/4 cups of sugar

Step-by-step explanation:

You could change 3/4 to a decimal which is .75

Then multiply that by 3

The result was 2.25, so you would convert that into a fraction which would be 2 1/4

8 0
3 years ago
Circles M and K are congruent and QR is congruent to LN. Find QR
ddd [48]

At first, we need to find x.

QR = LN

2x+1 = 3x-7

x=8

Substitute value of a=8 into QR = 2x+1.

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5 0
3 years ago
Please can u help simplify
Triss [41]

Answer:

frac{21x^6y^5}{14x^2y^9}

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Step-by-step explanation:

4 0
2 years ago
6.The curved surface area of a cylinder is 216π. If its height is 18cm,then what will
DIA [1.3K]

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r≈4.75

Step-by-step explanation:

8 0
3 years ago
Marty has a driveway that is 200 feet long. The tires on her car have a diameter of 18 inches. What is the fewest number of tire
Olin [163]

Answer:

Step-by-step explanation:

The diameter of a tire is the distance across the tire through the center. Since tires are circular, you can find the circumference of the tire from the diameter. The circumference represents the distance the tire travels when it makes one revolution. If you know the number of inches in a mile and the circumference, you can find the number of times the wheel turns per mile.

First, measure the diameter of the tire in inches.

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3 0
2 years ago
Read 2 more answers
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