Ask question

Ask question

All categories

Dennis_Churaev [7]

3 years ago

11

20 POINTS PLUS BRAINLIEST ANDWER PLUS MY HOVER HOARD IM V DESPERATE HERE!!! Evaluate the polynomial for x=-2 in the equation -3x

^3+7x^2-7x-1 (simplify your answer)

1 answer:

Nadya [2.5K]3 years ago

4 0

Answer:

65

Step-by-step explanation:

-3x^3 + 7x^2 -7x-1

Let x = -2

-3(-2)^3 +7(-2)^2 -7(-2) -1

According to PEMDAS, Powers first

-3(-8) +7(4) +14 -1

Then multiply

24 +28 +14-1

Then add and subtract

65

You might be interested in

Please help me in these simple equations

cupoosta [38]

Answer:

1. $225cm^2$

2. $544mm^2$

3. $405mm^2$

4. $67.50cm^2$

5. $495mm^2$

6. $480cm^2$

Step-by-step explanation:

1. Square

$A=s^2$

s = 15 cm

$A=(15cm)^2\\A=225cm^2$

------------------------------------------------------------------------------

2. Rectangle

$A=l*w\\A=(32mm)(17mm)\\A=544mm^2$

------------------------------------------------------------------------------

3. Rectangle

$A=l*w\\A=(45mm)(9mm)\\A=405mm^2$

------------------------------------------------------------------------------

4. Triangle

$A=\frac{hb}{2}\\ A=\frac{(9cm)(15cm)}{2}\\ A=\frac{135cm^2}{2}\\ A=67.50cm^2$

------------------------------------------------------------------------------

5. Triangle

$A=\frac{hb}{2}\\ A=\frac{(30mm)(33mm)}{2}\\ A=\frac{990mm^2}{2}\\ A=495mm^2$

------------------------------------------------------------------------------

6. Rectangle

$A=l*w\\A=(34cm)(20cm)\\A=480cm^2$

8 0

4 years ago

Cheryl is taking an online test that gives her instant results. After answering 16 questions, the test revealed that 10 were ans

Anna [14]

Y=5(3/2)^x is this model exponential growth,decay or neither ?

4 0

3 years ago

Read 2 more answers

Please help.! Is due tommorow

Wewaii [24]

Answer:

v stands for velocity. v1 is the initial velocity or the velocity at the start and v2 is the final velocity or the velocity at the end. the equation is the equation for acceleration.

3 0

2 years ago

How does heat from charcoal stove reach the person near it

Kipish [7]

there are the ways to reach that are conduction,convection and radiation

6 0

3 years ago

What is the slope of OP

frozen [14]

Answer:

B

Step-by-step explanation:

Area of a triangle is 1/2 * Base * height

So we can say: 1/2 * k * (k-2)

That is equal to 24. Let's solve for k first:

$\frac{1}{2}(k)(k-2)=24\\k(k-2)=24*2\\k(k-2)=48$

Putting 8 into k, solves the equation, hence k is 8.

<em>So point P (8, 8- 2) , which is </em>

<em>P(8,6)</em>

<em />

The slope of OP is the change in y divided by change in x. Looking at the diagram, going from (0,0) to (8,6), the change in y is 6 and change in x is 8

So slope is 6/8

Reduced, that is 3/4

Answer choice B is right.

8 0

4 years ago