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marishachu [46]
2 years ago
11

PLEASE HELP =(

Mathematics
1 answer:
Elena-2011 [213]2 years ago
4 0

Let X = pounds of Bermuda grass needed.

(20 pounds bahia grass x $6.30) + ( X x $3.65) = (20 +X) x $4.90

Simplify:

126 + 3.65X = 98 + 4.90X

Subtract 3.65X from each side:

126 = 98 + 1.25X

Subtract 98 from each side:

28 = 1.25X

Divide both sides by 1.25

X = 28 / 1.25

X = 22.4 pounds required.


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2 years ago
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Read 2 more answers
Find the value of f(9) and g(-9) if f(×) = -7×-9 and g(×) = 6×3-23×
Vlada [557]

Answer:

f(9)= -72

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Step-by-step explanation:

First put the original equation

f(x)=-7x-9

Next plug in the number f(9)

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After multiply -7(9) which gets you -63

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Then subtract -63-9 which gets you -72

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-----------------------------------------------------------

First put the original

g(x)=6x3-23x

Next plug in the number g(-9)

g(-9)=6x3-23(-9)

After multiply 6x3 which gives you 18 then multiply -23(-9)

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