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LenKa [72]
3 years ago
8

luke earned $54 after mowing 3 lawns. write an equation comparing earnings to lawns mowed .how much would luke earn after mowing

7 lawns
Mathematics
2 answers:
MariettaO [177]3 years ago
8 0
Luke earned $54 for 3 lawns
So each lawn  = $54/3 = $18

After mowing 7 lawns =
7 X $18 = $126
adelina 88 [10]3 years ago
5 0
Let's let x = the number of lawns. $54=3x    ?=7x well if you mowed 3 lawns and you got $54 that would mean it would cost $18 to mow one lawn so 18*7=$126.SO $126=7x
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Find the roots. 2x 2 + 7x - 15 =0
Reika [66]
So you always want to pull out the gcf first but since there isn't one, we can move on.
so we can make an acb chart which is multiplying the a value and the c value and find factors that of that product that will equal the b value.
a value is 2
c value is -15
b value is 7
-30 factors to equal 7 = 10, -3
10 - 3 = 7
so the factors 10 and -3 work. 
so now you make 2 separate parenthesis with one of the factors and one x. and it should be set equal to 0.
(x+10)(x-3) = 0
now solve for x in each separate parenthesis. 
x = -10 
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those r the roots
hope this helps
4 0
3 years ago
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barxatty [35]
Lets find 2 points, one obvious one is (0,0), another point is (12,4)

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y = mx + b

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we got m = 1/3

We can eliminate answer choices C and D.

y = 1/3x + b

we need to solve for b

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0 = 0 + b

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The equation of the line is y = 1/3x + 0, or y = 1/3x

Your answer is B.
3 0
3 years ago
12.5 feet long weighs 158 pounds. How much does a piece of the same steel pipe 18.75
AveGali [126]

Answer:

237 pounds

Step-by-step explanation:

237 pounds

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tia_tia [17]
I believe the wording of the question is: If one tray can hold 12 loaves of bread and the rack can hold 10 trays, can a hundred and twenty-five loaves fit on one rack? 
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6 0
3 years ago
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Tema [17]
Rewrite the second equation in same form as the first So we have

c + 4d = 8

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Answer c = 1 and d = 1 3/4  Answer
3 0
3 years ago
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