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Ann [662]
2 years ago
11

Please help ASAP

Mathematics
1 answer:
GaryK [48]2 years ago
6 0

Answer:

  • Any value of k

Step-by-step explanation:

The quadratic expression can be factored into two binomials if it has two real roots.

<u>Two real roots possible with non-negative discriminant:</u>

  • D ≥ 0

As D = b² - 4ac, we get the following inequality

  • k² - 4(3)(-8) ≥ 0
  • k² + 96 ≥ 0
  • k² ≥ - 96

This is true for any value of k

  • k ∈ (- ∞, + ∞)
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Marina spent $13.50 at the grocery store. She bought pears, kiwis, and pineapples. Pears cost $0.50 each, pineapples cost $1.50
kiruha [24]

Answer:

Number of pineapples = 10

Number of pears = 10 + 9 = 19

Number of kiwis = 10 - 2 = 8

Step-by-step explanation:

Money = $ 13.5

Cost of a pear = $ 0.5

Cost of a pineapple = $ 1.5

Cost of a kiwi = $ 0.3

let the number of pineapple = p  

Number of pears = p + 9

Number of kiwis = p - 2

Cost is

0.5 (p + 9) + 0.15 p + 0.3 (p - 2) = 13.5

0.5 p + 4.5 + 0.15 p + 0.3 p - 0.6 = 13.5  

0.95 p = 9.6

p = 10

So, number of pineapples = 10

Number of pears = 10 + 9 = 19

Number of kiwis = 10 - 2 = 8  

4 0
3 years ago
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The diagram shows a part of a regular 10 sided polygon<br> work out the size of the angle marked x
OverLord2011 [107]

Answer:

b

Step-by-step explanation:

b

7 0
2 years ago
Mr. David monthly salary is revised from $2500 to $2600.What percentage is the salary increased
Sveta_85 [38]

Answer:

4% Hope this helped.

Step-by-step explanation:

The formula is: final value minus starting value divided by the starting value then times 100

THIS FORMULA ONLY APPLIES TO PERCENT INCREASE

<u>Final Value−Starting Value</u>

      Starting Value                    x100

Plug numbers in

2600-2500/2500 x 100

100/2500=0.04

0.04x100

=4%

5 0
3 years ago
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how many legs do 10 people have? if two people dont have legs. one person has 3 legs and one person has one leg. and mary has a
Ganezh [65]
So here is the answer. Normally, 10 people have 20 legs since each person has 2 legs each. But given the scenario that two people don't have legs, this would mean 20 minus 4, is 16 legs. Then one person has 3 legs, 16 plus 3 and it is 19. And then, another person has one leg, 19 plus 1 is 20. Therefore, the total legs would still be 20. Hope this helps. The dog does not count.
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3 years ago
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PLEASE HURRY! I NEED AN ANSWER, THANKS! :)
Svetradugi [14.3K]

Answer:  D) Inverse does not exist

<u>Step-by-step explanation:</u>

The top row is 0 0 , which makes the determinant equal to zero.

The reciprocal of 0 is undefined so there cannot be an inverse for this matrix.

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3 years ago
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