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irina1246 [14]
3 years ago
6

What two numbers add to -8 and multiply to 8??

Mathematics
1 answer:
motikmotik3 years ago
7 0
a+b=-8\\
ab=8\\\\
a=-8-b\\
ab=8\\\\
(-8-b)b=8\\
-8b-b^2-8=0\\
b^2+8b+8=0\\
b^2+8b+16=8\\
(b+4)^2=8\\
b+4 =-\sqrt8 \vee b+4=\sqrt8\\
b=-4-2\sqrt2 \vee b=-4+2\sqrt2\\\\
a=-8-(-4-2\sqrt2) \vee a=-8-(-4+2\sqrt2)\\
a=-8+4+2\sqrt2 \vee a=-8+4-2\sqrt2\\
a=-4+2\sqrt2 \ve a=-4-2\sqrt2



-4+2\sqrt2\text {    and}-4-2\sqrt2
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A television game show begins with 20 contestants. Each week, the players vote 2 contestants off the show. What is the rate of c
nadya68 [22]

Using a linear function, it is found that the rate of change in this problem situation is of -2 contestants per week.

<h3>What is a linear function?</h3>

A linear function is modeled by:

y = mx + b

In which:

  • m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
  • b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

Considering the situation described, the number of participants after n weeks is given by:

N(n) = 20 - 2n.

The slope is of -2, hence the rate of change in this problem situation is of -2 contestants per week.

More can be learned about linear functions at brainly.com/question/24808124

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6 0
2 years ago
Anya's grandparents decide they want to invest at the bank. They have $35,000
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Anya's parents will have $44,440.71 after 6 years if they invested in a bank.

The interest rate given is an annual rate yet will be compounded quarterly. You therefore need to convert the interest rate to a quarterly rate.

= 4% / 4 quarters

= 1% per quarter

Number of periods:

= Number of years x Number of quarters in year

= 6 x 4

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The amount they will have in their account is:

<em>= Amount x ( 1 + rate) ^ number of periods </em>

= 35,000 x ( 1 + 1%)²⁴

= $44,440.71

In conclusion, they will have $44,440.71 if they invested their money in a bank for 6 years.

<em>Find out more at brainly.com/question/13861384.</em>

3 0
3 years ago
Please Help Me with this Question. I do not understand it.
ludmilkaskok [199]

Answer: 30

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Step-by-step explanation:

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