Answer:
x = 20
Step-by-step explanation:
These 2 angles are supplementary so they add up to 180:
3x - 10 + 5x + 30 = 180
8x + 20 = 180
8x = 160
x = 20
they easiest way to find the right answer is to look at the 2 first terms and checking if they equal 64x³
doing so:
A:
48x³+...
B:
64x³+...
C:
9x³-48x³+...
= -39x³+...
-> the answer should be B, to make sure this is the right answer, you can just solve B
B:
(4x+3)(16x²-12x+9)
= 64x³- 48x²+36x+48x²-36x+27
= 64x³+27
-> answer B is correct
Answer:
D=E (Base angle of isosceles triangle are equal)
D+E+F= 180° (sum of angles of a triangle️)
(4x+7)+(4x+7)+(5x+10) = 180
13x = 180- 24
x= 156/13 = 12°
so, E= 4x+7 = 4×12+7 = 55
Hope this helps:)
Answer:
A=-8 and B=-2
Step-by-step explanation:
I can’t really see the questions that well, what does it say?