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3 years ago

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PLSSSS HELPP, Sharon has collected donations of $4.40, $3.12, $8.00, and $6.22 to help buy books for the new library. What is th

e mean (average) amount of donations she has collected?

1 answer:

hoa [83]3 years ago

6 0

Answer:

5.43500

Step-by-step explanation:

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dawn has 5/6 yard of lace. She uses 4/5 of it for a dress and the rest for a jewel box. How much lace does she use for the jewel

GrogVix [38]

$amount\ used\ for\ jewel\ box=all\ lace-\ lace\ used\ for\ dress\\\\\
amount\ used\ for\ jewel\ box=\frac{5}{6}-\frac{4}{5}=\frac{25}{30}-\frac{24}{30}=\frac{1}{30}\\\\ \frac{1}{30}\ of\ lace\ is\ for\ jewel\ box.
$

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3 years ago

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I really need help with this section

Tpy6a [65]

Looks like you did most of it.

The next step would be setting them equal to 105, like the problem suggests.

$5z+3x+7x=105$

$15x=105$

$x=7$

Then we can plug back in to find the numbers.

$5*7=35$

$3*7=21$

$7*7=49$

$35+21+49=105$

The three numbers are $35, 21, 49$ .

Hope this helps.

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3 years ago

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How many three-digit numbers are divisible by 2,3 or 5? plEASe helP I aM DeSpeRatE

frosja888 [35]

Answer:

30

Step-by-step explanation:

- A number is divisible by 2 if its last digit is 2, 4, 6, 8 or 0

- A number is divisible by 3 if ist sum of digits is divisible by 3.

- A number is divisible by 5 if its last digit is a 5 or a 0.

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The least 3 digit number divisible by 30 is 120 and the greatest is 990.

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3 years ago

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An oil spill spreads 25 square meters every 16

Allisa [31]

First, divide 2 and 16 and you get 8 then, multiply 25 times 8. I think.

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3 years ago

How many positive integers $n$ with $n\le 500$ have square roots that can be expressed in the form $a\sqrt{b}$ where $a$ and $b$

My name is Ann [436]

Answer:

23

Step-by-step explanation:

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3 years ago