Since CB || ED and CB = ED,
by the alternate interior angles theorem,
mE = mC, and mD = mB.
with CB = ED, we can conclude that CBF = EDF, by SAS congruent theorem.
For the first one, we add 2.7 to both sides to get x≥13. Next, we divide both sides by -0.84 to get x≥ 168/-0.84. SInce we multiplied or divided by a negative number, we switch the sign around and end up with x≥200
Answer: -7 < x < 3
Step-by-step explanation:
-21 < 3x < 9
-7 < x < 3
Using the compound interest formula,
A = P(1+r)^n
A = 17000
r = 4% quarterly
n = 8yrs = 32 quarters of a year
P = ?
17000 = P(1+4%)^32
P = $[17000/((1+4%)^32)]
We claim that the answer is 
Since the two graphs both open down, and all the answer choices, in addition to the equation of the blue graph, are quadratic polynomials, the leading coefficient must be negative. This immediately rules out answer choices A, B, and C, leaving D as the answer.
