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
Viktor [21]
3 years ago
6

F(x) = 2(2)2 – 3(2) + 7 = 2(4) – 3(2) + 7

Mathematics
1 answer:
hammer [34]3 years ago
5 0

Answer:

9

Step-by-step explanation:

2(2)2 -3(2) + 7

2(4) - 6 + 7

8 - 6 + 7

2 + 7

9

You might be interested in
Find the area please and an explanation would be appreciated but its not demanded
lara [203]

Answer:

162

Step-by-step explanation:

just multiply 18x9

8 0
2 years ago
Read 2 more answers
Compare 0.3 and 0.8 using >,=, or<. Draw a model or number line to support your solution
Solnce55 [7]

answer:

the answer would be <

3 0
3 years ago
Which graph of a relation is also a function ?
Illusion [34]

Answer:

B

Step-by-step explanation:

A graph is only a function when there is only one y value for each x value.

A trick is to draw a line through some points on the x-axis, and if the line goes through more than one point. Then it is not a function. (See picture)

Sorry, not all the lines are straight, but you get the point. B is the only one that doesn't have more than one point on the lines I drew.

3 0
2 years ago
A ladder 10 ft long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 0.8 ft/s,
shusha [124]

Answer:

-0.133 radians/s is the angle between the ladder and the ground changing when the bottom of the ladder is 8 ft from the wall.

Step-by-step explanation:

Let

x= distance between the wall and ladder

Ф = angle between the ladder and ground

The rate of change is: dx/dt = 0.8 ft/s

We need to find dФ/dt when x = 8 ft/s

From the triangle in the figure we see that:

cos Ф = x/10

=> x = 10 cosФ

Now, the rate of change will be

d(x)/dt = d/dt (10cosФ)

dx/dt = -10 sin Ф dФ/dt

dx/dt = 0.8 (given)

to find dФ/dt

we need to find sin Ф when x = 8

By Pythagoras theorem

(hypotenuse)^2 = (Perpendicular)^2+(base)^2

(10)^2 = (8)^2+ (Perpendicular)^2

100 = 64 +  (Perpendicular)^2

=>  (Perpendicular)^2 = 100-64

(Perpendicular)^2 = 36

Perpendicular = 6

sin Ф = Perpendicular/hypotenuse

sin Ф = 6/10 = 3/5

Putting values in:

dx/dt = -10 sin Ф dФ/dt

0.8 = -10(3/5) dФ/dt

0.8 = -6 dФ/dt

=> dФ/dt = 0.8 / -6

dФ/dt = - 0.133 radians/s

So, -0.133 radians/s is the angle between the ladder and the ground changing when the bottom of the ladder is 8 ft from the wall.

3 0
3 years ago
Need help on 13 and 14
USPshnik [31]
13. Supplementary angles are two angles that add up to 180 degrees.

3x + x = 180

Combine like terms:
4x = 180

4x divided by 4 = x

180 divided by 4 = 45

x = 45

Equation:
3(45) + 45 = 180

135 + 45 = 180 (TRUE STATEMENT)

Angle A = 135 degrees
Angle B = 45 degrees

This is correct as 135 + 45 adds up to 180 (making it a supplementary angle) AND 135 is 3 times bigger than 45 so it fits the answer’s standard.

Ima do number 14 in the comments as I don’t want to take too long to show number 13.
3 0
2 years ago
Other questions:
  • A bookstore sells paperback fiction books in excellent condition for $2.50 and in fair condition for $0.50. Write an expression
    15·1 answer
  • How many equal line segments are needed to make 6 triangles
    15·1 answer
  • 8\10 3\5 1\2 greatest to least
    5·2 answers
  • 23= 7/9(6x-36)+9<br><br> solve for x<br><br> x=__
    6·2 answers
  • The Jensen family took a road trip in September.the dad fills up the tank,he records the miles on the SUV as 24,033.he pays $83.
    8·1 answer
  • State a value that would make the following inequality true:
    13·1 answer
  • PLS HELP ASAP
    7·1 answer
  • Uh, uh, uh, uh
    7·1 answer
  • Write the ratio in simplest form.
    5·1 answer
  • NEED HELP ,,,,,,, HELP IF U CAN ASAP
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!