Answer:
x < 12
Step-by-step explanation:
150 - 20 = 130
x < 130 / 10 - 1
x < 13 - 1
x < 12
Answer:
X=11
Step-by-step explanation:
Answer:
∠ B = 60°
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
(10x - 45)° is an exterior angle of the triangle , then
10x - 45 = 3x + 4x = 7x ( subtract 7x from both sides )
3x - 45 = 0 ( add 45 to both sides )
3x = 45 ( divide both sides by 3 )
x = 15
Then
∠ B = 4x = 4 × 15 = 60°
Distance = rate * time
trip there, 120 = 55 *t
t = 2 and 2/11 hours
trip back, 120 = r * (2.75 - 2.181818181) round trip time - time to get there
120 = r * .568181818181818
r = 211.2 miles per hour
thinking maybe you did not copy the problem accurately...thats pretty fast.
D. f(x)= x*-9x^o+2x^2-4x+10
