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Kipish [7]
3 years ago
6

I need to find (a) f(-2)

Mathematics
1 answer:
tatiyna3 years ago
8 0

for x < 0 use x^2

=》 f(-2) = (-2)^2 =4

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4x-11y=68 ; 6x+5y=-27 by elimination
zimovet [89]

Answer:

x=\frac{1}{2}\\\\y=-6

Step-by-step explanation:

Given the following system of equations:

\left \{ {{4x-11y=68} \atop {6x+5y=-27}} \right.

In order to solve the system of equations using the Elimination Method, you can follow these steps:

- Multiply the first equation by -6 and the secondd equation by 4.

- Add both equations.

- Solve for "y".

Then:

\left \{ {{-24x+66y=-408} \atop {24x+20y=-108}} \right\\.........................\\86y=300\\\\y=\frac{-516}{86}\\\\y=-6

- Substitute the value of "y" into one of the original equations and solve for "x":

6x+5(-6)=-27\\\\6x=-27+30\\\\x=\frac{3}{6}\\\\x=\frac{1}{2}

4 0
3 years ago
Find the length of arc AB.<br> 120<br> 10
mamaluj [8]

Step-by-step explanation:

the length <em>s</em><em> </em>of the arc AC is given as :

s = r. 0

where

r = 10 is radius

0 = 90°

= π/2 rad is angle

s = 10. π/2

= 5π

= 5.3.14

= 15.7 ~ 16

6 0
4 years ago
Evaluate -2x2 y, if x = -3 and y = -1
Gre4nikov [31]
The answer is -12
these are the steps on how to find that 
-2x2y
-2(-3)2(y)
6 times -2
-12
6 0
3 years ago
There is a picture attached *try to show work*
Harlamova29_29 [7]
Replace F in the equation with 113.

5/9(113-32)

5/9(81)

5 * 81 = 405
405 / 9 = 45 degrees Celcius
5 0
4 years ago
Read 2 more answers
CAN U GUYS PLEASE ANSWER THE SIMULTANEOUS EQUATIONS QUESTIONS. THIS IS EXTREMELY URGENT. Solve questions a and c
Akimi4 [234]

Answer:

y=2

x=4

Step-by-step explanation:

So for a y=2 then y=2x-6

We already know the value of y, 2

To find the value of x you substitute the y value into the second equation

So 2=2x-6 (then move -6 to the other side of the equation, +6)

8=2x (move 2 to the other side, ÷2)

So x=4

I hope this helped :)

6 0
4 years ago
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