Evaluate piecewise functions

Answer:

the area is 20 in

Step-by-step explanation:

3 times 4 is 12. since we used 3 inches out of the 11, we can only multiply the 8 inches with 1. 8 times 1 is 8. 12+8=20.

Answer:

Step-by-step explanation:

A car moves from rest. During the first 20 seconds, it moves uniformly to a distance of 40 m. Then it stopped there for 10 seconds. Then It takes 20 seconds to move uniformly back to the starting position.

Answer:

c

Step-by-step explanation:

Answer: No, it's not the solution

Explanation:

Let's plug x = -5 into the second equation

y = 2x+10

y = 2(-5)+10

y = -10+10

y = 0

This shows that (-5,0) is the actual solution, instead of (-5,2)

Answer:

f(-2) =-32

Step-by-step explanation:

f(x) = 5x* - 3x² + 6x + 2. f(-2)

f(-2) = 5(-2) - 3([tex]-2^{2}[/tex]) + 6(-2) + 2

f(-2) = -10 - 3(4) -12 + 2

f(-2) = -10 - 12 -12 + 2

f(-2) = (-10 - 12 -12) + 2

f(-2) = (-10 -24) + 2

f(-2) = (-34) + 2

f(-2) =-32

Hope that helps!

Answer:

[tex] \boxed{f( - 2) \: is \: - 32}[/tex]

Step-by-step explanation:

f(x) = 5x - 3x² + 6x + 2

f(-2) ?

substitute -2 as x into the equation of the function

f(-2) = 5(-2) - 3(-2)² + 6(-2) + 2

[tex]f( - 2) = - 10 - 3.4 + ( - 12) + 2[/tex]

[tex] f( - 2) = - 10 - 12 + ( - 12) + 2[/tex]

[tex] f( - 2) = - 22 - 12 + 2[/tex]

[tex]f( - 2) = - 32[/tex]

Answer:

4/15

Step-by-step explanation:

They have baked 1/3 + 2/5. To add you need common denominators.

1/3 = 5/15,     2/5 = 6/15

5/15 + 6/15 = 11/15. This is what they baked.

To find what is left, we need to subtract from 1.  1 = 15/15

15/15 - 11/15 = 4/15

Answer:

28 Dollars

Step-by-step explanation:

80 diveded by 2 is 40

20 percent of 40 is 8

there for each should have tipped 28

Answer:

total tipped = 20% × $80

= $16

total lunch price = $80 - $16

= $64

amount each person pay for tipped

= $16 ÷ 2

= $8

amount each person pay for lunch

= $64 ÷ 2

= $32

total each person pay for lunch and tipped

= $8 + $32

= $40

The expression to describe the situation is $1500m, which represent the total amount you’ve earned.

Expressions can be regarded as the mathematical statements which posses  two terms  or more as well as  numbers or variables, along with an operator.

sincere the total earning is $1500 a month,Then it can be expressed in term of m as   $1500m

learn more about expression at: https://brainly.com/question/723406

#SPJ9

Answer:

20

Step-by-step explanation:

Write 25% as 25/100 · Since, finding the fraction of a number is same as multiplying the fraction with the number, we have 25/100 of 80 =         25/100 × 80

[tex]2p - 3 > p + 6 \\ 2p - p > 6 + 3 \\ p > 9[/tex]

Answer:

  a. the investment earns 4%

  b. yes

Step-by-step explanation:

The "rule of 72" says that an investment earning compound interest at x% will double in value after 72/x years. That is, ...

  f(x) = 72/x

__

We interpret f(4) to mean Becky's friend is interested in the doubling time for an investment that earns 4% interest.

__

Using the above formula, ...

  f(4) = 72/4 = 18

The friend's math is correct.

Answer:

A. f + y ≤ 11

17f + 287 ≤ 242

Step-by-step explanation:

[] Let f be football players and v be volleyball players.

-> The total time must be less than or equal to 242 seconds.

-> If football players talked for 17 seconds, we can write it as 17f.

-> If volleyball players talked for 28 seconds, we can write it as 28v.

[] Coming back to the first point I made, the total time must be less than or equal to 242 seconds.

-> 17f + 28v ≤ 242

[] This is going to be a part of our system of inequalities

-> Because of this, we rule out the following options.

B & D - the football players talk for 17 seconds, not the volleyball players

C ​ - not less than or equal too, only less than

[] This leaves us with the option of A.

-> The first part of it also works. If 11 players can talk to the crowd, then the total of f and v must be equal too or less than 11.

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

Answer:

Step-by-step explanation:

Current Weight         Weight after adding Marbles

Giulio:    2x                          2x + 10                    

Jim:         x                             x + 5

You didn't post the options so hopefully you can determine the answer based on the info I provided above.

Answer:

I believe its C sorry if im wrong

Step-by-step explanation:

simplified, it should be -8.5n+8.5

Answer: Brainlest would be much appreciated

(A= amount P=principal r= interest rate n= number of times interest is compounded per unit 't' nt=time)

n=4. I'm not sure tho!!

Answer:

The variable x is equal to 10 degrees.

Step-by-step explanation:

A triangle's angles, in total, must equal 180 degrees.

71 + 50 + (6x-1) = 180

71 +50 = 121

121 + (6x-1) = 180

6x - 1 = 59

6x = 60

x = 10

Answer:

Nonexistent

Step-by-step explanation:

The constant of proportionality k is given by k=y/x

We have three examples:

1. x=-3, y=1 (k=-1/3)

2. x=-1, y=3 (k=-3/1)

3. x=3, y=-1 (k=-1/3)

Because the constants are inconsistent, the answer is the last option, Nonexistent.

Answer:

a = 21°

b = 70°

c = 89°

Step-by-step explanation:

a = 21° as vertically opposite angles are equal

to work out b:

angles on a straight line add up to 180

b + 110 = 180

b = 180 - 110

b = 70°

to work out c:

the sum of angles in a triangle add up to 180

we have a and b

21 + 70 + c = 180

91 + c = 180

c = 180 - 91

c = 89°

Answer:

according to another user on Brainly the variable is n=-21

Step-by-step explanation:

subtract 986 from both sides first.why? Because that is that is going to isolate the variable.

hope this helps! :)

Answer:

25/7

Step-by-step explanation:

mixed number to improper fraction greater than 1

-multiply the denominator by the whole number then add that number to the top number and put the original denominator under that number.

Answer:

142.24$

Step-by-step explanation:

112 = 100% 9x112

/ 100100. = 10.08$

? = 9%

112 = 100% 18x112 /100 =. 20.16$

? = 18%

so.......

112$ + 20.16$ + 10.08$

= 142.24$

Answer:

the answer is 60

Step-by-step explanation:

you multiply what's on top 5*12=60

Answer:

B. [tex]-1 \le x \le 3[/tex]

Step-by-step explanation:

The domain is the possible x- values of a function. The x- values of this graph range from -1 to 3, so the answer is B.

Refer to the attachment

Answer:

1820

Step-by-step explanation:

n = 16

r = 4

(16)C(4) = 1820

Answer:

Given, 3x−2<2x+1

⇒3x−2x<1+2

⇒x<3orx∈(−∞,3)

The lines y=3x−2 and y=2x+1 both will intersect at x=3 

Clearly, the dark line shows the solution of 3x−2<2x+1.

Answer:

No

Step-by-step explanation:

If you input g = 4 into the inequality, you have

8 - 4 > 4

4 > 4

4 is NOT greater than 4

To be correct, the inequality would have to read:

8 - g ≥ 4

This would be correct because now it reads

4 ≥ 4

4 is greater than OR equal to four

Answer:

3.94

Step-by-step explanation:

i think it is correct and i hope this helps but it may be wrong