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Anika [276]
3 years ago
9

How to find the zeros of f(x)=-2x^2+8x

Mathematics
1 answer:
BabaBlast [244]3 years ago
4 0
2×^2+8×
8x-2x
6x^2
x=3
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What is the sum of 16 quotient of 3
marysya [2.9K]
X + y = 16 (1)
x/y = 3 (2)
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x + y = 16 
x = 16 - y
1. Substitute x into equation 2 
16-y/y = 3 
16 - y = 3y 
16 = 4y
y = 4 
2. Now substitute y into equation 1 
x/y = 3 
x/4 = 2
x = 12 
Therefore, x = 12, y = 4
8 0
3 years ago
One positive number exceeds another by 7​, and their product is 78. Find the numbers.
Alona [7]

Answer:

13 and 6

Step-by-step explanation:

  • 13 • 6 = 78
  • 13 – 6 = 7

3 0
3 years ago
He is paid a commission of 9 percent of his first $6,000 in sales during the month and 14 percent on all sales over $6,000. What
Agata [3.3K]

Answer:

  $1,956.80

Step-by-step explanation:

For amounts over $6000, the commission can be computed as ...

  0.14s -300 . . . . . . for sales (s) ≥ 6000

So, for $16,120 in sales, the commission is ...

  0.14×$16,120 -300 = $2,256.80 -300 = $1,956.80

__

The commission schedule suggests that for larger amounts, you divide the problem into two parts: calculate the commission on $6000, and separately calculate the commission on the amount over $6000.

  0.14(s -6000) + 0.09(6000)

  = 0.14s - 0.14·6000 +0.09·6000

  = 0.14s -300 . . . . the formula used above for s ≥ 6000

6 0
3 years ago
the ratio of red marbles to blue marbles in a bag is 3:4. if there are 42 marbles in the bag, how many of the marbles are red?
AlexFokin [52]

Answer:

18

Step-by-step explanation:

Sum the parts of the ratio, 3 + 4 = 7

Divide the amount of marbles by 7 to find the value of one part of the ratio

42 ÷ 7 = 6 ← value of 1 part of the ratio, thus

red marbles = 3 × 6 = 18

8 0
3 years ago
Which expression gives the number of magazines printed after t minutes ?
const2013 [10]
B) 70t
Because for every 1 min there are 70 magazines printed
8 0
3 years ago
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