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PilotLPTM [1.2K]
3 years ago
14

Perform the operation. (-2x^2-4x+2)-(-6x+2) (−2x 2 −4x+2)−(−6x+2)

Mathematics
1 answer:
AleksandrR [38]3 years ago
4 0

Answer:

-50x^2+30x-4

Step-by-step explanation:

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An account grows at an annual interest rate of r⁡​ ⁣, so it grows by a factor of x=1+r⁡​ ⁣⁣ ​⁡ each year. The function A(x)=800x
Paladinen [302]

Given:

Annual interest rate = r⁡​%

Growth factor : x = 1 + r⁡​

The below function gives the amount in the account after 4 years when the growth factor is x⁡​ ⁣⁣.

A(x)=800x^4+350x^3+500x^2+600x

To find:

The total amount in the account if the interest rate for the account is 3% each year and initial amount.

Solution:

Rate of interest = 3% = 0.03

Growth factor : x = 1 + ⁡0.03 = 1.03

We have,

A(x)=800x^4+350x^3+500x^2+600x

Substitute x=1.03 in the given function, to find the total amount in the account if the interest rate for the account is 3% each year.

A(1.03)=800(1.03)^4+350(1.03)^3+500(1.03)^2+600(1.03)

A(1.03)=800(1.12550881)+350(1.092727)+500(1.0609
)+618

A(1.03)=900.407048+382.45445+530.45+618

A(1.03)=2431.311498


A(1.03)\approx 2431.31


Therefore, the total amount in the account is 2431.31 if the interest rate for the account is 3% each year.

For initial amount the rate of interest is 0.

Growth factor : x = 1 + ⁡0 = 1

Substitute x=0 in the given function to find the initial amount.

A(1)=800(1)^4+350(1)^3+500(1)^2+600(1)

A(1)=800+350+500+600

A(1)=2250

Therefore, 2250 was put into the account at the beginning.

3 0
3 years ago
Sushil was thinking of a number. Sushil adds 7 to it, then doubles it and gets an answer of 85.5. What was the original number?
LiRa [457]

Answer:

39.25

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Two runners start 30kilometer apart and run toward each other. they meet after 3hours. One Runner runs 2 kilometers per hour fas
joja [24]

Answer:

4 km per hour and 6 km per hour.

Step-by-step explanation:

The combined running rate  = 30/3 = 10 km/h.

If one runner's speed = x then the other one's speed is x+2 km/h.

So x + x + 2 = 10

2x = 8

x = 4

So one runs at 4 km/h and the other at 6 km/h.

3 0
3 years ago
Divide the polynomials<br><br> (2x^2+x+3)/(x-2)
Damm [24]
You divid the two numbers on top to equal the bottom and the factor one out
8 0
3 years ago
Jorge watches cars that pass in front of his house. He counts 25 red cars and 40 cars that are not red. What is the approximate
jenyasd209 [6]

Step-by-step explanation:

firstly you will add

the red cars and non red cars together and which is 65

probability of the red car = 25/65

to the lowest form is the 5/13(D)

8 0
3 years ago
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