-WILL GIVE 20 POINTS- -HELP NEEDED ASAP-

Given that ∠ABD = 76°, which equation could be used to solve problems involving the relationships between ∠DBC and ∠ABC?

A) (9 + 12a) = (3a + 7)

B) (9 + 12a) + (3a + 7) = 76

C) (9 + 12a) − (3a + 7) = 76

D) (9 + 12a) − 76 = (3a + 7)

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Find the value of x that will make l ll m

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y