MATHEMATICS HIGH SCHOOL

If f(x) = x3 – 2x2, which expression is equivalent to f(i)? A) –2 + i
b) –2 – i
c) 2 + i
d) 2 – i

Answers

Answer 1
Answer:

Answer

d) 2 – i


Explanation

f(x) = x³ – 2x²

When x = i, we proceed as follows.

Note: i =

          i² =(√-1)(√-1) =  -1

          i³ = (√-1)(√-1)(√-1) = -1(√-1) = -1i = -i

f(x) = x³ – 2x²

f(i) = i³ – 2i²

     = -i – 2(-1)

     = -i + 2

      = 2 – i
Answer 2
Answer:

Answer:

f(i)=2-i

d is the correct option.

Step-by-step explanation:

The given function is f(x)=x^3-2x^2

Substitute x = i, to find f(i)

f(i)=i^3-2(i)^2

We can rewrite this as

f(i)=i^2\cdot i-2(i)^2

Now, we know thati^2=-1. Thus, we have

f(i)=(-1)\cdot i-2(-1)

On simplifying, we get

f(i)=-i+2\n\nf(i)=2-i

d is the correct option.

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Hi, I need help with this equation  x²+y²-4x-6x+9=0
The demand d for a companys product cost x is predicted by the function d(x) = 500-2x. The price p in dollars that the company can charge for the product is given by p(x)=x+5
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If g(x) = 3(x − 2), find the value of x if g(x) = 6.A- 12 B- 2.6 C- 8 D -4

I need answer ASAP I’m next 10 mins

Answers

Answer:

B

Step-by-step explanation:

First simplify the first term to get

10y^4

then multiply 10y^4 by 4 square root 6y^3

40y would be all you needed to get answer

Answer:

40y^5√6y (B)

Step-by-step explanation:

Let's multiply 2√25y^8 * 4√6y^3:

8√150y^11 (When you multiply exponents with the same base, you can just add the exponents and keep the same base:

Ex. 4^5 * 4^9 = 4^14)

Let's simplify 8√150y^11

√150 = 5√6

√y^11 = y^5√y

So our final answer would be:

40y^5√6y

Garrett wants to bake a blueberry pie. At the market, blueberries cost $1.90 per pound. If he pays $4.75 for blueberries, how many pounds does he buy?

Answers

Answer:

Step-by-step explanation:

4.75/1.9 gives you the pounds that he bought, or 2.5 pounds
he bought 2.5 pounds

Blake knows that one of the solutions to x^2- 6x + 8 = 0 is x = 2. What is the other solution

Answers

If one solution of the equation is 2, then the other solution of the equation will be 4.

What is the solution to the equation?

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

It is a method for dividing a polynomial into pieces that will be multiplied together. At this moment, the polynomial's value will be zero.

The equation is given below.

x² - 6x + 8 = 0

Then the factorization of the equation will be

x² - 6x + 8 = 0

x² - 4x - 2x + 8 = 0

x(x - 4) - 2(x - 4) = 0

(x - 4)(x - 2) = 0

x = 2, 4

If one solution of the equation is 2, then the other solution of the equation will be 4.

More about the solution of the equation link is given below.

brainly.com/question/545403

#SPJ6
This is what is called a quadratic equation, using the formula he got x = 2, using the quadratic we can find the other answer, after using the formula you get 2 answers, which are x= 4 and 2, we already have 2 so the other solution is x = 4 :)

What is the product?(2x – 1)(x + 4)

2x2 – 4
2x2 + 4
2x2 + 7x – 4
2x2 – 7x – 4

Answers

the answer is the third one 2x^2+7x-4

Answer:

the answer is the c. 2x^2+7x-4

Step-by-step explanation:

$4 is what percent of $50

Answers

it is 8 percent of 50. 

This is 1 way-
4/50=%/100 You now have a proportion. Cross multiply.
50%=400 Replace % with any variable.
50x=400 Now divide both sides of the equation by 50.
x=8

(% is basically the percentage of 4 of 50 over 100. its much easier to solve percentage problems when the percentages are over 100. 100 represents a full percentage. 
example- 4 of 100 is 4% of 100)

2nd example-
Since the percentage can be found if over 100 as well (%/100), and since 100 is a multiple of 50, we can do 4 of 50 (which would look like 4/50) and multiply  both numbers by 2 to get the percentage. These are our steps:

4/50× 2/2=
8/100

Therefore, 4 of 50 is 8% of 50

Please someone answer this question as quick as possible please

Answers

Answer: 1/5 is the answer :)
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