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KATRIN_1 [288]
3 years ago
8

Need help on precalcues

Mathematics
1 answer:
Vinvika [58]3 years ago
7 0

5 ≥ 2, so the second rule of <em>C(x)</em> applies :

<em>C</em> (5) = 25 + 3•(5 - 2) = 25 + 3•3 = 25 + 9 = 34

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Help me find my answer please
vova2212 [387]

Answer:

3/6 or 1/2

Step-by-step explanation:

y2-y1 = 8-2 = 6

x2-x1 = 3-0 = 3

The point would be (3,6) or if simplified (1,2)

HOPEFULLY THIS HELPED :)

5 0
4 years ago
Use the substitution method to solve the system of equations. Choose the correct ordered pair. x + 2y = 12 –x = –y – 6
LekaFEV [45]

Answer:

(8,2)

Please make sure I interpreted your system correctly below.

x+2y=12

-x=-y-6

Step-by-step explanation:

I assume the system is

x+2y=12

-x=-y-6

-----------

I'm going to multiply both sides of equation 2 by -1 giving me

x+2y=12

x=y+6

I'm now going to plug equation 2 into equation 1.

(y+6)+2y=12   I replaced x with y+6 in the first equation

y+6+2y=12

3y+6=12

3y=6

y=2

So

x=y+6

x=2+6

x=8

The solution is (8,2)

6 0
4 years ago
What is the slope of the line that passes through the points (6,5) and (13,12)? Write your answer in the simplest form.
Mamont248 [21]

Answer:

y = x-1

Step-by-step explanation:

The general equation of a line is y= mx+ b , where m is the slope of the line , and b is the y-intercept ( where the line intersects  the y-axis)

For the points (x1 = 6, y1 = 5) and ( x2 = 13, y2 = 12) that are on the line give the

slope m = (y2-y1) / (x2-x1) =  (12-5) / (13-6)  = 7/ 7  = 1

Now the equation  of the line became y = x+b , because the slope m= 1

To find b we have to substitute x and y of any of the 2 given points in our equation.

The point ( x= 6, y = 5) gives the equation 5 = 6 +b ; 5-6 = b; -1 = b

Now the equation  of the line became y = x -1 , because the y- intercept, b=-1

8 0
3 years ago
7 less than one fourth of a number equal to 7. what is the number? Explain how you got it.
Xelga [282]

We can set up this problem as an equation in order to determine the unknown number. Thus, x/4 - 7 = 7. Here, 7 less than one-fourth of the unknown number (x) is equal to 7. Add 7 to the other side, and you are left with x/4 = 14. Multiply both sides by 4 in order to eliminate the denominator of the fraction. Now, we are left with x = 56. When we put it all together, 1/4 of 56 = 14. And 7 less than 14 is 7. Hope this helps!

4 0
3 years ago
-7a^2+3a-9 from 5a^2-6-4 subtract
atroni [7]

Answer:

Step-by-step explanation:

To subtract -7a^2+3a-9 from 5a^2-6-4

We have

5a^2-10--7a^2+3a-9

5a^2-10+7a^2+3a-9

Collect like terms

12a^2+3a-10-9

12a^2+3a-19

6 0
3 years ago
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