3 years ago

When x=-2 and y=-1,-x^2-5xy+5y^3 is

Mathematics

1 answer:

kirill115 [55]3 years ago

5 0

Answer:

-19

Step-by-step explanation:

Evaluate -x^2 - 5 x y + 5 y^3 where x = -2 and y = -1:

-x^2 - 5 x y + 5 y^3 = -(-2)^2 - -2 (-5) + (-1)^3×5

(-2)^2 = 4:

-4 - -5 (-2) + 5×(-1)^3

(-1)^3 = -1:

-4 - -5 (-2) + 5×-1

-5 (-2) = 10:

-4 - 10 - 5

-4 - 10 - 5 = -(4 + 10 + 5):

-(4 + 10 + 5)

| 1 | 0

| | 5

+ | | 4

| 1 | 9:

Answer: -19

You might be interested in

• 1. If 16 ounces of bulk rice costs $2.50, how much would 24 ounces cost? Solve the problem and then verify your response using

jasenka [17]

$60 hope this helps you!:)

6 0

3 years ago

Read 2 more answers

Approximate the value of 5(pi)

max2010maxim [7]

Answer: C

Step-by-step explanation: 5pi converts to 15.70796

5 0

3 years ago

Read 2 more answers

Let f(x)=−1/4(x+4)^2−8 . What is the average rate of change for the quadratic function from x=−2 to x = 2? Enter your answer in

kiruha [24]

Answer:

Average rate of change of function is -2.

Step-by-step explanation:

Given $f(x)=\frac{-1}{4}(x+4)^2-8$ .

we have to find the average rate of change for the quadratic function from x=−2 to x = 2.

$f(-2)=\frac{-1}{4}(-2+4)^2-8=\frac{-1}{4}(4)-8=-9$

$f(2)=\frac{-1}{4}(2+4)^2-8=\frac{-1}{4}(36)-8=-17$

The average rate of change of the function f(x) on interval [-2,2] is

$\frac{f(b)-f(a)}{b-a}=\frac{f(2)-f(-2)}{2-(-2)}=\frac{-17-(-9)}{4}=\frac{-8}{4}=-2$

3 0

3 years ago

Amanda's computer weighs 56 ounces. how many pounds does it weigh?

vampirchik [111]

56 ounces are 3.5 pounds because 16 ounces are 1 pound and if you divide 56 by 16 you get 3.5

7 0

3 years ago

Read 2 more answers

Help, will mark brainliest!! and give 5 stars this is due 2day!!

Leto [7]

11. brother = ???

???- 12 = 14

14+12=26

brother is 26.

12. 21.35 - 8.95 = 12.4

cost of colored pencils = $12.40

13. 37- 8 = 29

14. $95 - $73 = $22

6 0

2 years ago