Steps to solve:
f(x) = 3x³ – 2x² + x; x = -3
~Substitute
f(-3) = 3(-3)³ - 2(-3)² + (-3)
~Solve the exponents
f(-3) = 3(-27) - 2(9) + (-3)
~Multiply
f(-3) = -81 - 18 - 3
~Subtract
f(-3) = -102
Best of Luck!
Answer:
Answer is 68 degree
Step-by-step explanation:
From point A to B is 180 degree because it's a straight line.
We know that two of the angles are 90 and 22
We jus have to add 90 and 22 together to get 112
Take 112 and subtract that from 180 to get 68
Answer:
(-7,2)
Step-by-step explanation:
3x+8y=-5
-2x+2y=18
so first of all, you want either x or y to be the same for both equations <em>(it can be negative or positive but has to be the same number)</em>
to do that, we'll multiply them:
I'll do y because it is easier
(-2x+2y=18) 4
<u>-8x+8y=72</u>
<u>3x+8y=-5
</u>
the y's now match
let's subtract them because they're both positive
-8x - 3x = -11x
8y - 8y = 0
72 - (-5) = 77
so -11x = 77
which results to x = -7
now we need the y.
to do that, we simply plug in the x in any of the equations:
-2x+2y=18
-2 (-7) + 2y = 18
14 + 2y = 18
2y = 4
y = 2
so the answer is (-7,2) if you're looking for a point
A : B : C = 5 : 8 : 10
A+ B = 5x + 8x = 13x
13x - 10x = 60
3x = 60
x = 20
Total = 5x + 8x + 10x = 23x
23x = 23(20) = 460 <========= answer