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Temka [501]
3 years ago
12

What is the solution of the equation (x - 5)2 + 3(x - 5) + 9 =0? Use u substitution and the quadratic formula to solve.

Mathematics
1 answer:
larisa [96]3 years ago
4 0

Answer:

x = 7/2 ± 3/2*(i√3)

Step-by-step explanation:

The equation is

(x - 5)^2 + 3(x - 5) + 9 =0

Let A = (x-5)

The equation becomes now

(A)^2 + 3(A) + 9 =0

We then apply the quadratic formula

A = [-(3) ± √((3)^2-4(1)(9)) ]/ (2(1))

A = -3/2 ± 3/2*(i√3)

Now, we revert the substitution

(x-5) = -3/2 ± 3/2*(i√3)

x = 7/2 ± 3/2*(i√3)

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2 3/8 - 5/8 = ? help plzzz​
Gennadij [26K]

Answer: i just did this in school the other day! your answer is, 1 3/8

Step-by-step explanation: ignore the whole number, then subtract 5 from 3 and because you already have a common denominator, you don't need to deal with those shenanigans.

well you can't  subtract 5 from 3 so you use the whole number and 3 becomes 8  5 from 8 is 3 so your answer is 1 3/8!

4 0
3 years ago
A correlation where the x-value increases and the y-value increases is called a __________.
madam [21]
Positive correlation.

Zero is x increases y stays the same
Negative is both decrease
5 0
3 years ago
A 60-kilogram person stands on a compression spring. The spring constant is 2500 Newtons per meter What is the displacement of t
Mademuasel [1]
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6 0
3 years ago
PLEASE HELP (:
Kaylis [27]

Answer:

{12,15}

Step-by-step explanation:

Given the function f(x) = x+5, if the range of the function is {7,9}, the domain of the function is derived by simply finding the value of the function at each end point.

At endpoint x = 7,

f(7) = 7+5

f(7) = 12

At endpoint x = 9

f(9) = 9+5

f(9) = 14.

The function domain is therefore at {12,14}

4 0
3 years ago
B is between A and C. If AB= 4x+9, BC=5x+2,and AC=56, find the value of AB?​
natali 33 [55]
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