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Delicious77 [7]
3 years ago
12

Sovle: 10 -2x = -30 Please use subsitution Show your steps to solve the equation

Mathematics
2 answers:
Flauer [41]3 years ago
8 0

answer: x=20

10-2x=-40

-10. -10

-2x=-40

-2x/-2=-40/-2

x=20

Margaret [11]3 years ago
7 0
10 - 2x = -30
-2x = -40
2x = 40
x = 20
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Dan bought a home theater system for $178.99 on the installment plan. The term of the contact said that he would pay $35 a month
bija089 [108]
Given that Dan bought a home theater system for $178.99 on the installment plan, and the terms of the contract is such that he will pay $35 in 6 months.
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b] Dan's Finance charge will be given by:
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7 0
3 years ago
A salesperson gets a 3% commission on the sale of a copy machine. What is his commission on a copy machine that costs $4,950.00?
kondor19780726 [428]
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3 years ago
suppose the linear regression line y= 2.4x + 3.1 predicts the time,in minutes it takes you to be served at a food stand if there
Scorpion4ik [409]

Answer:

Just substitute "x" with "3".

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3 0
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Read 2 more answers
Which domain restrictions apply to the rational expression?
andre [41]

Both expression have the same denominator: 9x²-1. Thus it must not be 0.

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Adding those expressions:

E=(-x-2)/(9x²-1 ) + (-5x+4)/(9x²-1)=

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4 0
3 years ago
Cosx+1/sin^3x=cscx/1-cosx
ANTONII [103]
<span> I am assuming you want to prove:
csc(x)/[1 - cos(x)] = [1 + cos(x)]/sin^3(x).

 </span>
<span>If we multiply the LHS by [1 + cos(x)]/[1 + cos(x)], we get:
LHS = csc(x)/[1 - cos(x)]
= {csc(x)[1 + cos(x)]/{[1 + cos(x)][1 - cos(x)]}
= {csc(x)[1 + cos(x)]}/[1 - cos^2(x)], via difference of squares
= {csc(x)[1 + cos(x)]}/sin^2(x), since sin^2(x) = 1 - cos^2(x).

 </span>
<span>Then, since csc(x) = 1/sin(x):
LHS = {csc(x)[1 + cos(x)]}/sin^2(x)
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= [1 + cos(x)]/sin^3(x)
= RHS.

 </span>
<span>I hope this helps! </span>
8 0
3 years ago
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