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2 years ago

Only number 8 and show the work please?

Mathematics

1 answer:

bogdanovich [222]2 years ago

6 0

Uh thats weird no make sense

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If a polynomial function f(x) has roots -9 and 7-i, what must be a factor of f(x)

Likurg_2 [28]

Hello from MrBillDoesMath!

Answer:

x + 9 and (x + ( i - 7)) are factors

Discussion:

If f(x) has roots -9 and 7-i then

f(x) = g(x)(x - (-9)) (x - (7-i)) ( g(x) is a polynomial of degree less than f(x))

That is, x + 9 and (x + ( i - 7)) are factors of f(x)

BTW: if the coefficients of f(x) are real (not stated in the Question) then the conjugate of 7-i, i.e. 7 + i, is also be a root.

Thank you,

MrB

3 0

2 years ago

Read 2 more answers

What two digits multiplied together make 90

jonny [76]

Solve is in the picture

Good luck :)

5 0

3 years ago

Read 2 more answers

7x = 2 <br> what does x equal?

Ira Lisetskai [31]

Answer:

0.29

Step-by-step explanation:

7x=2

/7 /7

x=0.29

-hope it helps

8 0

2 years ago

Read 2 more answers

Francis can buy 7 shirts for $42 or 8 shirts for $48. How much will she pay for nine?

Delvig [45]

Answer:

$54

Step-by-step explanation:

$42/7=6\\48/8=6\\x/9=6\\x=54$

Hope this helped :D

5 0

2 years ago

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On the trip from KC to Springfield, the church van consumed 15 gallons of gas to go 179 miles. If gas cost $2.58 per gallon, wha

Otrada [13]

Answer:

$77.4

Step-by-step explanation:

GIVEN: On the trip from KC to Springfield, the church van consumed $15$ gallons of gas to go $179$ miles. If gas cost $\$2.58$ per gallon.

TO FIND: Cost of a round trip to Springfield.

SOLUTION:

Distance of springfield from KC $=179\text{ miles}$

As it is a round trip total distance $=2\times179=358\text{ miles}$

As $15$ gallons gas used for $179$ miles distance

gas required for $1$ mile $=\frac{15}{179}$ gallons

gas required for $358$ miles $=\frac{15}{179}\times2=30$ gallons

cost of one gallon of gas $=\$2.58$

cost of $30$ gallons of gas $=30\times2.58=\$77.4$

Hence cost of roundtrip to Springfield is $77.4

6 0

2 years ago