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notsponge [240]
4 years ago
9

It takes Susan 3 hours to fix 2 broken cars and it takes Joseph 4 hours to fix 3 broken cars. If they work together how long wil

l it take them to fix 17 broken cars?
Mathematics
1 answer:
icang [17]4 years ago
8 0
Combined rates

Susan = 2 car / 3 hr
= 2/3

Joe = 3 car / 4 hr
= 3/4

add the rates to get the new combined rate as 17 cars in "t" hours.

2/3 + 3/4 = 17/t

Need common denominator

2/3(4/4) + 3/4(3/3) = 17/t

8/12 + 9/12 = 17/t

17/12 = 17/t

see that "t" is 12 hours
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Ne4ueva [31]
Put all number choices in for x. 1+5=6, 3+5=8, 5+5=10, 7+5=12. The equation says that the answer has to be greater than ten. 6 and 8 are less than ten, and ten is equal to ten, so the only answer is 7, because 7+5=12 :)
6 0
3 years ago
What is 43 x 2452?
Dafna11 [192]

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Step-by-step explanation:

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8 0
3 years ago
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The weight of a full steel bead tire is approximately 800
AleksAgata [21]

Answer: 1.76

1.54

Step-by-step explanation:

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5 0
3 years ago
Dallison cooked a 5-pound roast for supper.What is estimated mass in grams?
Kay [80]
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8 0
3 years ago
HELP PLEASE
postnew [5]

 

2)  

x^2 - 14x - 32  = x^2 - 16x + 2x - 32  = x(x-16) + 2(x-16) = (x - 16)(x + 2)

<h2>⇒   x^2 - 14x - 32  = (x - 16)(x + 2)</h2>

---------

3)  

2n^2 - 7n - 15  =

= 2n^2 - 10n + 3n - 15 =

=  2n(n - 5) + 3(n - 5) =

= (n - 5)(2n + 3)

<h2>⇒ 2n^2 - 7n - 15  = (n - 5)(2n + 3)</h2>

---------

4)  

<h2> x^2 - 25 = (x - 5)(x + 5)</h2>

5 0
3 years ago
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