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Ugo [173]
1 year ago
5

2.5(10x - 16) = 5 What decimal represents the solution to the equation?

Mathematics
1 answer:
Pavlova-9 [17]1 year ago
4 0

2.5(10x - 16) = 5

2.5 is multiplying on the left, then it will divide on the right

10x - 16 = 5/2.5

10x - 16 = 2

16 is subtracting on the left, then it will add on the right

10x = 2 + 16

10x = 18

10 is multiplying on the left, then it will divide on the right

x = 18/10

x = 1.8

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Paul [167]

Answer:

-5

Step-by-step explanation:

Moving all terms of the quadratic to one side, we have

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(The discriminant is more commonly known as \sqrt{b^2-4ac}, but I changed the variable since we already have a c in the quadratic given.)

In the quadratic above, we have a=1, b=-2, and d=-(c+4). Plugging this into the formula for the discriminant, we have

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Using the distributive property to expand and simplifying, the expression becomes

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Setting the discriminant equal to 0 gives

2\sqrt{c+5}=0.

We can then solve the equation as usual: first, divide by 2 on both sides:

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\boxed{c=-5}.

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2 years ago
Please help me with this problem ASAP
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Answer:

Step-by-step explanation:

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