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
pickupchik [31]
2 years ago
15

How can you find f(2) if f(x) =3x2 -7

Mathematics
2 answers:
lesya [120]2 years ago
6 0

Answer: f(2) = 5

Step-by-step explanation:

Given:

f(x) = 3x^{2}-7

To find f(2) , all we need do is to substitute 2 for x in the given function

That is :

f(2) = 3(2^{2})-7

f(2) = 3(4) - 7

f(2) = 12 - 7

f(2) = 5

Therefore :

f(2) = 5

Afina-wow [57]2 years ago
3 0
You have to put 2 in for ’x’
You might be interested in
Help?? Ty!! for the help much love!!
Leviafan [203]
Your answer is C. :)
5 0
2 years ago
Howard is designing a chair swing ride. The swing ropes are 4 44 meters long, and in full swing they tilt in an angle of 2 3 ∘ 2
qaws [65]

Question:

Howard is designing a chair swing ride. The swing ropes are 4 meters long, and in full swing they tilt in an angle of 23°. Howard wants the chairs to be 3.5 meters above the ground in full swing. How tall should the pole of the swing ride be? Round your final answer to the nearest hundredth.

Answer:

7.18 meters

Step-by-step explanation:

Given:

Length of rope, L = 4 m

Angle = 23°

Height of chair, H= 3.5 m

In this question, we are to asked to find the height of the pole of the swing ride.

Let X represent the height of the pole of the swing ride.

Let's first find the length of pole from the top of the swing ride. Thus, we have:

cos \theta = \frac{h}{L}

Substituting figures, we have:

cos(23) = \frac{h}{4}

Let's make h subject of the formula.

h = 4cos(23) = 3.68

The length of pole from the top of the swing ride is 3.68 meters

To find the height of the pole of the swing ride, we have:

X = h + H

X = 3.68 + 3.5

X = 7.18

Height of the pole of the swing ride is 7.18 meters

3 0
3 years ago
A spinner has 5 sections labeled a b c d and e the spinner was spun 84 times and the results are recorded in the table.
Keith_Richards [23]
The answer is E 17 you divide 84 by 5
5 0
3 years ago
32 people volunteers to donate blood. n dident have he health requirment so they couldent donate the rest of the volunteers dona
Vesna [10]

Answer:

the equation representing total amount of blood donated is 470(32-n)=15040-470n \ ml.

Step-by-step explanation:

Total number of volunteers = 32

number of volunteers couldn't donate blood = n.

So Number of volunteers who donated blood can be calculated by subtracting number of volunteers couldn't donate blood from Total number of volunteers.

Framing in equation form we get;

So, the number of remaining volunteers who donated blood = 32-n.

Each of these volunteers donated blood = 470 ml

Now Total Amount of Blood donated is equal to Amount each of these volunteers donated blood times the number of volunteers who donated blood.

Framing in the equation form we get;

total amount of blood donated  milliliters = 470(32-n)=15040-470n \ ml

Hence the equation representing total amount of blood donated is 470(32-n)=15040-470n \ ml.

4 0
3 years ago
What is the complement of an angle that measures 43 deegress ?
ANTONII [103]

complementary angles sum up to 90°.

so if one of them is 43°, then the other is just 90 - 43 = 47°.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Find a report in a newspaper magazine or on the Internet that uses results from a servery. Evaluate how the survey uses ratios t
    5·1 answer
  • HOW DO u do this?? Plz help!!!! Question 2
    15·1 answer
  • Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
    8·1 answer
  • Katie,Elizabeth,and Siobhan volunteer at the hospital. In a week,Katie volunteers 3 hours more than Elizabeth does and Siobhan v
    8·2 answers
  • PLEASE HELP MEEEE READ AND ANSWER
    7·1 answer
  • ANSWE PLEASEEEEEEEEEEEEEEE
    7·1 answer
  • I'll give u branliest and 10 points <br> please hurry due soon:)
    6·1 answer
  • The pay collected for working per hour is known as your hourly wage. It varies directly linearly with the hours that you work
    11·1 answer
  • Help me with math!!!!
    9·1 answer
  • The points (3, 9) and (–3, –9) are plotted on the coordinate plane using the equation y = a • x.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!