Answer:
x squared plus two times x minus one = zero.
Step-by-step explanation:
(This is a Quadratic equation in the variable x).
Answer:
48 ways
Step-by-step explanation:
Let me take a guess
S₁_₁₅ = (1+15)*7 + 8 = 120
There are 48 combinations of distinct digits from 1 to 15 to make 20
120-20=100
So every 20 has a corresponding 100
I wish I got it right, otherwise report it.
Answer:
BAC is 78°
Step-by-step explanation:
BCA = 180° - BCD ( angle in a straight line is 180°)
= 180° - 113°
= 67°
BAC = 180° - BCA - ABC (angle in a triangle is 180°)
= 180° - 67° - 35°
= 78°