Answer:
27°
Step-by-step explanation:
- A tangent meets a radius at 90°
- Angles in a trainable sum to 180°
- 180 - 90 - 63 = 27°
Answer:
37,500 m
Step-by-step explanation:
Given Usain bolt traveled 100m in 0.160 minutes
recall that
speed = distance travelled ÷ time taken
hence Usain Bolt's speed
= 100 m ÷ 0.160 min
= 625 meters per min
Now given that a car travels at the same speed for one hour.
recall 1 hour = 60 minutes.
Using the same formula as above
speed = distance traveled ÷ time taken
rearranging, we get
distance traveled = speed x time taken
we calculated the speed previously to be 625 m/min and we are given a time of 1 hour (i.e 60 min)
hence
distance traveled = speed x time taken
distance traveled = 625 m/min x 60 min = 37,500 m
Definition of negative exponent:
Following the definition, we have:
Answer: -9
Answer:
x= -1/3
x = -7
Step-by-step explanation:
9x^2 +66x+21 = 0
a=9 b=66 c=21
quadratic formula
x=(-b +/- square root of (b^2 – 4ac))/(2a)
x = (-66 +/- square root of (66^2 -4*9*21))/(2*9)
x = (-66 +/- square root of (4356 -756))/(18)
x = (-66 +/- square root of (3600))/(18)
x = (-66 +/- 60)/18
split the fraction
(-66 +/- 60)/18 = -6/18 and -126/18 because of the +/-
x = -6/18 x = -126/18
x = -1/3 x = -7