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slavikrds [6]
3 years ago
5

Kelly works two jobs. She usually works at a retail store for 8 hours during the day and is paid $12.90 per hour by the store. I

n the evening she works at a restaurant as a manager for 4 hours and is paid $12.20 per hour. How much does she make on average per hour for the day?
Mathematics
1 answer:
quester [9]3 years ago
6 0

Answer:

i believe its 12.55

Step-by-step explanation:

if you add both number,  12.90 and 12.20, then divide by 2.

you'll will gain the same result

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Scarlett made seven dozen sugar cookies. She needs 138 cookies for the cookie exchange. How many more cookies does she still nee
Serggg [28]

Answer:

54 cookies

Step-by-step explanation:

seven dozen means 7 * 12 cookies

because one dozen = 12 cookies, so having seven dozen means have seven, one dozen batches

seven dozen = 7*12 = 84 cookies

she already made 138

138 - 84 cookies = 54 cookies left to go

54 cookies

4 0
3 years ago
54:63 in simplest form
Bas_tet [7]

Answer:

I think it is 6/7

Step-by-step explanation:

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4 0
3 years ago
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Please help me asap!!!!!!!
mojhsa [17]

Answer:

588

Step-by-step explanation:

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7 0
2 years ago
8. A goldsmith has 130 grams of a gold alloy (a mixture of gold and one or more other metals) containing 85% pure gold. How
Tatiana [17]

Answer: 65 grams

Step-by-step explanation:

If 130 grams of a gold alloy (a mixture of gold and one or more other metals) containing 85% pure gold, you should first calculate the amount of gold that makes up this percentage.

That is, 85% of 130 grams.

85/100 × 130 = 110.5

Then, let X be what will be added to the above value to make 90%. So,

(110.5 + X) / ( 130 + X ) × 100 = 90

Divide both sides by 100

(110.5 + X) / ( 130 + X ) = 90/100

(110.5 + X) / ( 130 + X ) = 0.9

Cross multiply and open the bracket

110.5 + X = 117 + 0.9X

Collect the like terms

X - 0.9X = 117 - 110.5

0.1X = 6.5

Divide both sides by 0.1

X = 6.5/0.1

X = 65 grams

Therefore, the amount of pure gold that should be added is 65 grams

8 0
3 years ago
The sum of 14 and a number n is equal to 17. what is the number
jeka57 [31]

Answer:

3

Step-by-step explanation:

14 + n = 17

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6 0
4 years ago
Read 2 more answers
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