Use cosine rule:
c²=b²+a²-2ba cosC
Right triangle = 90 degrees
cosine 90 degrees = 0
c²=28²+15²-2×28×15×0
c²=28²+15²
c=√1009
c=31.8 in
Answer:
<u>The correct answer is B. 40 mph</u>
Step-by-step explanation:
1. Let's review the information provided to us to answer the question correctly:
Distance (d) the car traveled = 120 miles
Time (t) of the travel = 3 hours
2. What is the average rate of speed?
Rate of speed (r) = Distance (d) the car traveled/Time (t) of the travel
Replacing with the real values, we have:
Rate of speed (r) = 120/3 miles per hour
Rate of speed (r) = 40 miles per hour
<u>The correct answer is B. 40 mph</u>
its two ways gather all the relevant information first or throw all the non relevant information out first
Answer:
6x^3-13x^2+16x+7
Step-by-step explanation:
(3x+1)(2x^2-5x+7)
6x^3-15x^2+21x+2x^2-5x+7
6x^3-15x^2+2x^2+21x-5x+7
6x^3-13x^2+16x+7
