3 years ago

Two identical CDs regularly cost a total of $\$28.$ What is the cost in dollars of five of these CDs?

Mathematics

1 answer:

Paha777 [63]3 years ago

7 0

the answer is will be $140

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2x+5y=-55 y=3x+6 What is the solution

Arlecino [84]

Let: eq 1:2x+5y=-55
eq 2:y=3x+6
by substituting eq 2 in eq 1 we get,
2x+5(3x+6)=-55
2x+15x+30+55=0
17x + 85=0
x=-85/17
x=-5
By substituting x value in eq 2,
we have,
y=3(-5)+6=-15+6=-9

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3 years ago

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Factor x^2+6x-16 into the form (x+a)(x-b), what is a and b?

vfiekz [6]

Answer:

a=-8 b=2

Step-by-step explanation:

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Compare with (X+a)(X+b)

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3 years ago

There are no solutions to the system of inequalities shown belov

Aleks04 [339]

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2 years ago

What is the standard form of the number in the calculator’s display?

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Your final answer is b. 860,000,000,000.

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3 years ago