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2 years ago

Given the function f(x) = −5x2 − x + 20, find f(3).

Mathematics

2 answers:

Lera25 [3.4K]2 years ago

4 0

Answer: -28

given the function f(x) =-5x2 - x +20

find f(3)

lana66690 [7]2 years ago

3 0

f(x) = -5x^2 - x + 20;

f(3) = -5*3^2 - 3 + 20 = -5*9 - 3 + 20 = -45 - 3 + 20 = -28;

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svlad2 [7]

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Step-by-step explanation:

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3 years ago

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maks197457 [2]

Answer:

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Step-by-step explanation:

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2 years ago

Graph the system of equations on your graph paper to answer the question. {y=x−4y=−x+6 What is the solution for this system of e

arsen [322]

Answer:

(5,1)

Step-by-step explanation:

Given :

$y=x-4\\y=-x+6$

Solution :

Equation 1 : y=x-4

Equation 2 : y = -x+6

We will use substitution method

Putting the value of y from equation 1 in equation 2

⇒ $x-4 = -x+6$

⇒ $x+x= 6+4$

⇒ $2x=10$

⇒ $x=\frac{10}{2}$

⇒ $x=5$

Now substituting value of x in equation 1 to get value of y

⇒ $y=x-4$

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You can refer the attached figure.

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3 years ago

Read 2 more answers

Kamal and Anand each Lent the same sum of money for 2 years at 5 percent at simple interest and compound interest respectively.

Ivenika [448]

Answer:

amount lent: ₹6000
interest received: Kamal, ₹600; Anand, ₹615.

Step-by-step explanation:

For principal P invested at simple interest rate r, the returned value in t years is ...

A = P(1 +rt)

If K is Kamal's returned value, the given numbers tell us ...

K = P(1 +0.05·2) = 1.1P

For principal P invested at compound interest rate r, with interest compounded annually for t years, the returned value is ...

A = P(1 +r)^t

If A is Anand's returned value, the given numbers tell us ...

A = P(1.05)² = 1.1025P

This latter amount is RS.15 more than the former one, so we have ...

1.1025P = 1.1P +15

0.0025P = 15 . . . . . . . . subtract 1.1P

P = 6000 . . . . . . . . . . . divide by 0.0025 . . . . the amount lent

Kamal received 1.1P -P = 0.1P = 600 on the investment.

Each lent ₹6000. Kamal received ₹600 in interest; Anand received ₹615 in interest.

4 0

3 years ago