Answer:
x = 1
Step-by-step explanation:
Δ ABC and Δ DEF are congruent ( SAS postulate )
Thus corresponding sides are congruent that is
BC = EF , substitute values
13x - 12 = 7x - 6 ( subtract 7x from both sides )
6x - 12 = - 6 ( add 12 to both sides )
6x = 6 ( divide both sides by 6 )
x = 1
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
5x7 and 5x 0.3 seperately Then add together.
=36.5
8xy+65 take the 8 and multiply it to the 8 on the inside and that would be 64. 64 plus 1 is 65
Answer:
(x-12)(x+7)
Step-by-step explanation:
x^2 - 5x - 84
You find the factors of 84:
1,84; 2,42; 3,28; 4,21; 6,14; 7,12
7 and 12 are 5 apart, so we use them:
(x - 12)(x + 7)
The 12 is negative because it's greater than 7, and the coefficient of x is negative 5.