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Kitty [74]
3 years ago
11

Help below please!!!!!!!!!!!!!!

Mathematics
1 answer:
Papessa [141]3 years ago
3 0
I think you have to times 3/10 3 times and then add 5/9
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Do your best i need it quickly sorta, if you do a weird answer just for the points i will report you.
solong [7]

Answer: See below

Step-by-step explanation:

For this problem, we are given four functions, and their domains. All we have to do is figure out which equation we want to plug x into and solve.

f(-20)

For this first problem, we have x=-20. Then we can eliminate equations 1, 2, 4. We know equation 3 is the correct one because it says x<-12. -20 is less than -12. Therefore we plug in x=-20 to the third equation.

f(-20)=3(-20)-7              [multiply]

f(-20)=-60-7                  [subtract]

f(-20)=-67

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

f(0)

For this problem, we have x=0. Then we can eliminate equations 1, 2, 3. We know equation 4 is the correct one because it says x∈{-15, -12, 0, 10}. This means x has to be either one of the four numbers listed in the parentheses. We see that x=0 is in there. Therefore we plug in x=0 to the fourth equation.

f(0)=11-|-0-1|             [subtract]

f(0)=11-|-1|                [absolute value]

f(0)=11-1                    [subtract]

f(0)=10

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

f(15)

For this problem, we have x=15. Then we can eliminate equations 2, 3, 4. We know equation 1 is the correct one because it says x>10. This means x has to be greater than 10. 15 is greater than 10. Therefore we plug in x=15 to the first equation.

f(15)=\frac{1}{|15+1|-11}       [add]

f(15)=\frac{1}{|16|-11}           [absolute value]

f(15)=\frac{1}{16-11}             [subtract]

f(15)=\frac{1}{5}

7 0
2 years ago
Read 2 more answers
A computer engineer is paid $20 per hour and $12 for coming to work on time. How many hours must she work to earn a minimum of $
maksim [4K]

Answer:

8 hours

Step-by-step explanation:

Let x = the hours she work

Equation-

1.  20x + 12 = 172

2.         - 12   - 12

     20x = 160

3.   /20    /20

4.  x= 8 hours

1. Write out the equation

2. subtract 12 from both sides

3. Divide 20 on both sides

4. Your answer is 8 hours

3 0
3 years ago
The volume of a prism is 45 km3. What would change if the volume of the prism were measured in cubic meters?
givi [52]
The volume of the prism stays the same, but the number representing the volume increases because cubic meters converted to km is 1e-9
8 0
3 years ago
Read 2 more answers
Rachel multiplied each side of x ≥ 2 by 3. She wrote the result as 3x ≤ 6. Explain the error Rachel made.
andrey2020 [161]

Answer:

Her mistake was to change the inequality sign from ≥ to ≤.

The sign only changes when you multiply or divide both sides of an inequality by a negative number.

6 0
2 years ago
Which of the following systems of linear inequalities is represented by the
algol [13]

Answer:

Option D is correct.

Step-by-step explanation:

Option D is correct.

y < 2 and y >= x

Because the dotted line shows that y < 2 and y >=x is shown is represented by diagonal line.

5 0
3 years ago
Read 2 more answers
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