Answer:
s = -7.8
Step-by-step explanation:
from the question 12=10(s+4)+50
<u>first step</u>
open the bracket and evaluate for the value of s
12=10(s+4)+50
12 = 10s + 40 + 50
12 = 10s + 90
collect or combine the like terms
12-90 = 10s
-78 = 10s
divide both side by 10
-78/10 = 10s/10
-7.8 = s
therefor s = -7.8
Answer:
The answer is -2
Step-by-step explanation:
-6 + 4 = -2
Answer:
Slope = -1
Step-by-step explanation:
Answer:
-7 minus -2 = -5 (the last one)
Step-by-step explanation:
Thats the only one that made sense to me
Answer:
x = 61 mph
the average speed on the level Road is 61 mph
Step-by-step explanation:
Let x represent Best's average speed on the level road. (In mph)
Best's average speed on the winding road = x-20
Given;
Total distance travelled = 571 miles
Time travelled on level road = 6 hours
Time travelled on winding road = 5 hours
Distance travelled = average speed × time taken
Total distance travelled can be written as
6 × (x) + 5×(x-20) = 571
6x+5x-100 = 571
11x = 571+100
11x = 671
x = 671/11
x = 61 mph
the average speed on the level Road is 61 mph
