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Rama09 [41]
3 years ago
14

Please help with question number 3, please

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
6 0

The ratio is 9 : 7 which means for every 9 pounds of Quartz you have 7 pounds Marble. For the second row Quartz is 72. For the third row it's 11 bags because 99/9 = 11 and 11 times 7 equals 77. The four one is 126 pounds Quartz. Finally the last one is 15 bags and 15 times 7 is 75 pounds of Marble. What you do with the ratio is multiply by the number of bags to figure out with this many bags how many Quartz or Marble. You can do the same thing to figure out how many bags.

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7 copies of the sum of 8 fifths and 4
Serggg [28]
So what you would do is 8/5 + 4 x 7 = 26.9
then you round it to 30
7 0
3 years ago
Over the three evenings,Karen received a total of 137 phone calls at the call center. The third evening, she received 4 times as
marin [14]

Answer:

1st: 22, 2nd: 27, 3rd: 88

Step-by-step explanation:

Make an equation

If she recieved x calls the 1st evening, then the 2nd evening she recieved x+5, and the 3rd evening she recieved 4x.

x+x+5+4x=137

Combine like terms

6x+5=137

Subtract 5 from both sides

6x=132

Divide by 6 on both sides

x=22

First:

22 calls

Second:

x+5

22+5

27 calls

Third:

4x

4*22

88 calls

Hope this helps!

3 0
2 years ago
If 596 people voted in the election, how many were over 65 years old?
damaskus [11]

596 x 25% = 149

This implies 149 persons over the age of 65 voted.

I hope this helps.

4 0
2 years ago
Read 2 more answers
Worth 10pts!!! Can someone help?
gulaghasi [49]

Answer:

-4

Step-by-step explanation:

The average rate of change of the interval [a,b] is (f(b)−f(a)) / (b−a)

Replacing a=−5, b=4, f(x)=−x^2−5x+12.

 (f(b)−f(a))/(b−a) =12−5x4− 4^2 − (12−5 x(−5)−(−5)^2)/ (4−(−5))= −4.

3 0
2 years ago
a local hamburger shop sold a combined total of 572 hamburgers and cheeseburgers on Thursday. there were 72 more cheeseburgers s
Helga [31]

Answer: 250 hamburgers

Step-by-step explanation: x= hamburgers

If there are 72 more cheeseburgers than hamburgers there are:

x+72

The number of cheeseburgers and hamburgers=572 so:

572= x+72+x

Then solve

572=x+72+x

572=2x+72

-72 -72

———————

500=2x

500/2=2x/2

250=x

7 0
3 years ago
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