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shepuryov [24]
3 years ago
11

If a polynomial function f(x) has roots 3 and V7, what must also be a root of f(x)?

Mathematics
1 answer:
Tatiana [17]3 years ago
6 0

Answer:

- \sqrt{7}

Step-by-step explanation:

Radical roots occur as conjugate pairs.

Thus if x = \sqrt{7} is a root then - \sqrt{7} is also a root

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Solve 4x+y=8 x+y=5 Solving by elimination
Ulleksa [173]

Answer:

y=4,x=1

Step-by-step explanation:

4x+y=8

x+y=5

subtract equation 2 from equation 1

3x + 0=3

3x=3

divide both sides by 3

x=1

substitute for x=1 in equation 2

x+y=5

1+y=5

y=5-1(collecting like terms)

y=4

3 0
3 years ago
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Michelle deposited $1,385 into a savings account with a simple interest rate of 2.89% per year. If Michelle does not touch the f
aniked [119]

Answer:

$1,665.19

Step-by-step explanation:

Interest=PRT/100 where P is the principal amount deposited by Michelle, R is the rate offered per year in terms of percentage, T is the period in years

Substituting P for $1385, T for 7 years, R for 2.89% we obtain interest as follows

Interest=$1,385*2.89*7 years/100=$280.1855

Balance after 7 years will be the sum of principal amount and interest gained

Balance=$1,385+$280.1855 =$1,665.1855

Rounding off to 2 decimal places

Balance=$1665.19

Therefore, Michelle's balance is $1,665.19

4 0
3 years ago
Hi everybody.
KiRa [710]

Answer:  x  = 1

Step-by-step explanation:

The numbers in the middle below each row tell the difference between the two numbers above it.

So 12 - x = ?

     ? = 9 + 2

∴ 12 - x = 9 + 2

          x = 1

The image attached should help to make it much clearer. Comment with any questions or concerns.

8 0
2 years ago
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Geometric solids are three-dimensional representations of a figure.<br><br> True<br> False
sergey [27]

Answer:

it's false

Step-by-step explanation:

a figure is two-dimensional

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4 years ago
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3 years ago
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