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Setler [38]
3 years ago
15

Karl earned scores of 58, 88, 80, and 70 on his first 4 Chemistry tests. What is the minimum score he needs to earn on his fifth

test to ensure that his average score for the 5 tests will be at least 75 ?
Mathematics
2 answers:
OLga [1]3 years ago
8 0

Answer:

79

Step-by-step explanation:

(58+88+80+70+ x)/5=75

75*5=296x

375=296x

x=375-296

x=79

vichka [17]3 years ago
8 0

Answer: 50

Step-by-step explanation:

First let's set up an equation by calling the score he needs to get, x:

\frac{58 + 88 + 80 + 70 + x }{5} = 75

58 + 88 + 80 + 70 + x = 75 x 5

296 + x = 375

x = 79

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Angela is shopping for pet supplies and needs to buy a kennel and several toys. At Paws R Us, she would pay $50.75 for the kenne
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Answer: t>6

Step-by-step explanation:

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Given, At Paws R Us, she would pay $50.75 for the kennel and $3.75 for each pet toy.

Amount to pay =  $(50.75 + 3.75t)

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50.75 + 3.75t < 43.25 + 5t

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50.75+ 3.75t -3.75t   < 43.25 + 5t -3.75t

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50.75 - 43.25 < 1.25 t

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Divide both sides by 1.25 we get

⇒   6<t

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