Step-by-step explanation:
Im not sure ut it looks like 3x over 3x would cancel eachother out.
Angles in a triangle must add up to 180, so the missing angle inside the triangle is 180 - (70 + 40), which is 70.
Angles on a straight line (i.e. the line BD) must add up to 180, and because we know part of that angle is 70, x must be 180 - 70, which is 110.
Hence, x is 110 degrees.
Answer:
y = 36
Step-by-step explanation:
Answer:
equation: 3x+x+15+x=180
Step-by-step explanation:
solve:
3x+x+15+x=180
5x+15=180
5x = 165
x = 33
3(33) =99
33
33+15= 48
99+33+48=180
Answer:
roots are 8 and 11
Step-by-step explanation:
Vieta's theorem tells you the sum of roots in this case* is the opposite of the x-coefficient, so is 19. Their product is the constant term, 88.
It is convenient to search for the roots by considering the factors of 88:
88 = 1·88 = 2·44 = 4·22 = 8·11
Only the latter pair of factors has a sum of 19, so those are the roots we're looking for.
The roots of the equation are 8 and 11.
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* If the quadratic is ax²+bx+c with a≠1, then the sum of roots is -b/a, and their product is c/a.
