How to solve the problem--step-by-step:
m=each minute
plan A:
$15+$0.14x
plan B:
$20+$0.09x
Solve
15+0.14x=20+0.09x
15-15+0.14x=20-15+0.09x
0.14x=5+0.09x
0.14x-0.09=5+0.09x-0.09
0.05x=5
0.05x/0.05=5/0.05
x=100
Thus, at 100 minutes, the two plans cost the same.
Check Work
plan a: 15+0.14(100)= $29
plan b: 20+0.09(100)= $29
Solution is correct.
the answer would be 374.00
the original value before any increase or decrease is 340.00
so...
340.00 X 1.10 = 374.00
Answer:
(B) 36°
Step-by-step explanation:
AB is a secant to the circle and B D is the tangent.
Consider O as the center of the circle.
then ∠A O C =72° and ∠ COD =132°
As OD ⊥ B D [ Line from the center to the point of contact of tangent are perpendicular.]
∠ OD B= 90°
In Δ A O C
O A = O C [radii of same circle]
∠ O A C = ∠ O C A [ If sides are equal angle opposite to them are equal]
∠ O A C + ∠ O C A +∠ A O C =180° [ sum of angles of triangle is 180°]
2∠O AC+72° = 180°
∠O AC = 108°÷2
∠O AC = 54°
In Δ A B D
∠A B D + ∠A DB+ ∠BAD =180° [angle sum property of triangle]
∠A B D +90° +54° =180°
∠A B D = 180 - 144°
∠A B D =36°
Option (B) is correct.
Answer:
A. 243
B. 1
C. 64
D. 0.36
Step-by-step explanation: