first speed --- x mph
return speed -- x+16 mph
6/x + 6/(x+16) = 1
times each term by x(x+16)
6(x+16) + 6x = x(x+16)
x^2 + 4x - 96 = 0
(x-8)(x+12) = 0
x = 8 or x is a negative
her first speed was 8 mph
her return speed was 24 mph
check:
6/8 + 6/24 = 1 , that's good!
9) acute, right, obtuse
10) isosceles, obtuse
11) trapezoid
12) 360°
13) 100°
Answer:
Step-by-step explanation:
P = $ 30
r (rate of interest) = 5%
t (no. of years = 2 years
Simple interest = Prt/100
= $3
-x+3-x+5
-2x+8
-2(x-4) Answer
Step-by-step explanation: