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vladimir1956 [14]
3 years ago
8

What are two numbers that when multiplied equal -30 and when added together equal 1?

Mathematics
2 answers:
UkoKoshka [18]3 years ago
5 0

Answer:

5 and 6

Step-by-step explanation:

-5 x 6 = -30

-5 + (6) = 1

x2 + 1x - 30 = 0

(X - 5 ) (X + 6)

To summarize, since -5 and 6 multiply to -30 and add up 1, you know that the following is true:

x2 + 1x - 30 = (X - 5 ) (X + 6)

s2008m [1.1K]3 years ago
4 0
The answer is 6 and -5
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Evaluate (ab)^2 for a=3 and b=4
grandymaker [24]

Answer:

144 is the answer


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3 years ago
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Farmer Emmet used to own 2,300 acres of farmland. However, he recently sold 28% of his farm to a residential developer.
kap26 [50]

9514 1404 393

Answer:

  1. 1656 acres left
  2. 644 acres sold
  3. $32,200,000

Step-by-step explanation:

1. The number of acres sold is ...

  28% × 2300 = 0.28 × 2300 = 644

Then the number of acres Emmet has left will be ...

  2300 -644 = 1656 . . . acres left

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2. Emmet sold 644 acres.

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3. At $50,000 per acre, the value of the land sold was ...

  $50,000 × 644 = $32,200,000 . . . . paid by the developer

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2 years ago
If f(x)= 3x + 1 and f^(-1)= x-1/3, then the ordered pair of f^(-1)(10)=
iragen [17]

The answer is B

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plug in 10 to the inverse

10/3 - 1/3 = 9/3 or 3

this gives you the point (10,3)

8 0
3 years ago
11. Let f(x) = 2x² + 7x + 5
Lady_Fox [76]

Answer:

(x+1)(2x+5)

Step-by-step explanation:

f(x) = 2x² + 7x + 5

Factor the expression by grouping. First, the expression needs to be rewritten as 2x²+ax+bx+5. To find a and b, set up a system to be solved.

a+b=7

ab=2×5=10

Since ab is positive, a and b have the same sign. Since a+b is positive, a and b are both positive. List all such integer pairs that give product 10.

1,10

2,5

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The solution is the pair that gives sum 7.

a=2

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(2x²+2x)+(5x+5)

Factor out 2x in the first and 5 in the second group.

2x(x+1)+5(x+1)

Factor out common term x+1 by using distributive property.

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7 0
3 years ago
How would you graph, y=-x-2
Natali5045456 [20]
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3 years ago
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