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mestny [16]
3 years ago
7

Can anyone help me with this expression -1(7 + 10r) + 3

Mathematics
1 answer:
mezya [45]3 years ago
6 0

Answer:

-2(2+5r)

Step-by-step explanation:

-(7+10r)+3

then you remove the parentheses

-7-10r+3

calculate the sum

-4-10r

factor the expression

-2(2+5r)

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The Watson family and the Thompson family each used their sprinklers last summer. The Watson family's sprinkler was used for hou
o-na [289]

This question s incomplete, the complete question is;

The Watson family and the Thompson family each used their sprinklers last summer. The Watson family's sprinkler was used for 15 hours. The Thompson family's sprinkler was used for 30 hours.

There was a combined total output of 1050 of water. What was the water output rate for each sprinkler if the sum of the two rates was 55L per hour  

Answer:

The Watson family sprinkler is 40 L/hr while Thompson family sprinkler is 15 L/hr

Step-by-step explanation:

Given the data in the question;

let water p rate for Watson family and the Thompson family sprinklers be represented by x and y respectively

so

x + y = 55  ----------------equ1

x = 55 - y ------------------qu2

also

15x + 30y = 1050

x + 2y = 70 --------------equ3

input equ2 into equ3

(55 - y) + 2y = 70

- y + 2y = 70 - 55

y = 15

input value of y into equ1

x + 15 = 55

x = 55 - 15

x = 40

Therefore, The Watson family sprinkler is 40 L/hr while Thompson family sprinkler is 15 L/hr

8 0
3 years ago
PLEASE HELP ASAP THX SM (;
rjkz [21]

Answer:

558 cm^3

Step-by-step explanation:

V cone = 1/3 pi r^2 h

We know it is  186 cm^3

186 =1/3 pi r^2 h

Multiply by 3

558 = pi r^2 h


V cylinder = pi r^2 h

From above we know that pi r^2 h is 558 , so the Volume of  the cylinder is 558 cm^3

6 0
3 years ago
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dexar [7]
I tried working it out but I am not sure
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3 years ago
Lenders rely on credit scores to determine _____.
Strike441 [17]
The correct answer is risk.

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4 years ago
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Evaluate.
tangare [24]

Answer:

x +  \frac{1}{3}  \\  - 2.5 +  \frac{1}{3}  \\  \frac{ - 7.5}{3}  +  \frac{1}{3} \\   =  -  \frac{6.5}{ 3}  =  - 2.167

7 0
3 years ago
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