1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Delvig [45]
3 years ago
12

Evaluate the expression 2x^2 - x, when x = -3. Show all steps.

Mathematics
2 answers:
Alex_Xolod [135]3 years ago
5 0

Answer:

21

Step-by-step explanation:

2x² - x

2(-3)² - (-3)

2(9) + 3

18 + 3

21

V125BC [204]3 years ago
4 0

Answer:

21

Step-by-step explanation:

This is a substitution question,we are to substitute a given value in place of a certain letter

So let's solve

2x^2-x

And since x is given to be -3

So let's substitute

2(-3)^2-(-3)

2(9)-(-3)

18+3

21

So the final answer is 21

You might be interested in
Which of the following ordered pairs could represent the x-intercept of a function?
bearhunter [10]
The answer is (15,0) because the format is (x,y) so (15,0) means that it is on the x axis only ! 
6 0
3 years ago
the angle of elevation of a top of a tree from a certain point on the ground is 45 degree. if the tree is 15 meters high,how is
Sphinxa [80]

Answer:

15m

Step-by-step explanation:

tan° = opposite/ adjacent

tan45 = 15/x

1 = 15/x

and = 15

6 0
3 years ago
Duru has an ice-cream stand, which she opens on days that are forecasted to be warmer than 10°C.
Amanda [17]

Answer:

P(c(t)) =  20t-120

Step-by-step explanation:

Given

P(n) = 2n - 20

C(t) = 50 + 10(t - 10)

Required

Determine P(C(t))

The implication of the question is to solve for P(C(t))

Given that

C(t) = 50 + 10(t - 10) and P(n) = 2n - 20

P(c(t)) would be

P(c(t)) = 2(50 + 10(t - 10)) - 20

P(c(t)) = 2(50 + 10t - 100) - 20

Collect Like Terms

P(c(t)) = 2(50  - 100+ 10t) - 20

P(c(t)) = 2(-50+ 10t) - 20

Open Bracket

P(c(t)) = -100+ 20t - 20

Collect Like Terms

P(c(t)) =  20t-100 - 20

P(c(t)) =  20t-120

8 0
3 years ago
True or False? A 529 plan helps first-time homebuyers get mortgage loans.
lawyer [7]

I believe it is False, I'm not an expert on stuff like this though.

5 0
2 years ago
A bicycle is marked 40% off the original price of $150. It is then taxed at 7%. What is the final total cost of the bicycle?
postnew [5]
Your answer is: D. $96.75
6 0
3 years ago
Read 2 more answers
Other questions:
  • 26. A teenager consumes 20% of her calories each day in the form of protein. If she is getting 700 calories a day from protein,
    7·1 answer
  • What is the slope of the line?
    13·1 answer
  • What is the image of (-1, 1) after a dilation of 2?<br><br><br> (1, 3)<br> (-2, 2)<br> (2, 2)
    5·2 answers
  • 4(0.2x-5)=12 what is x
    14·1 answer
  • Which of the following points best represents the principal square root of 8 on the number line?
    13·1 answer
  • Match each expression in the left column with the correct product in the right column.
    7·1 answer
  • Write the standard equation of a circle that passes through (-2, 10) with center (-2, 6)
    5·2 answers
  • Mr. Perkins has \$ 120$120 in a savings account. The annual percentage rate is 4.25\%4.25% compounded monthly. How much will he
    5·1 answer
  • A rectangular dog cage has a length of 4 1/2 feet and a width of 3 3/7 feet. What is the area of the cage?
    15·1 answer
  • What would you do in order to write 1/5x +<br> 1/3y = 9 in standard form?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!