If ∠2 is 70˚, what is the measure of ∠1?
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If (ax + 2)(bx + 7) = 15(x 2) + cx + 14 for all values of x, and a + b = 8 then the two possible values for c is 31 and 41.
A linear equation is an algebraic equation with only a constant and a first-order (linear) term of the form y = mx + b, where m is the slope and b is the y-intercept. The above is sometimes referred to as a "linear equation of two variables," where y and x are the variables.
Let the equation be
(ax + 2)(bx + 7) = 15 + cx + 14
(ax + 2)(bx + 7) = ab + 7ax + 2bx + 14 = ab
+ (7a + 2b) + 14
On comparing both equations
ab = 15 ------ (1)
7a + 2b = c -------(2)
Also, it is given that a + b = 8 --------(3)
From equations (1) and (3) it can be observe that either a or b equal to 3 or 5
From equation (2),
When a = 3 and b = 5, then c = 7(3) + 2(5) = 21 + 10 = 31
When a = 5 and b = 3, then c = 7(5) + 2(3) = 35 + 6 = 41
Therefore, the correct answer is option D) 31 and 41
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Answer:
area of the shaded figure