Answer:
The change in her speed is 7 m/s - 4 m/s = 3 m/s.
Step-by-step explanation:
Speed is defined as the rate of change of distance with time.
i) Let the total distance of the cross country be x meters.
ii) The change in her speed is 7 m/s - 4 m/s = 3 m/s.
Answer:
First two options are the right answers
Step-by-step explanation:
select first two options. These are vertical angles.
Answer:
Part A: 9.75x > 195
Part B: x > 20
Step-by-step explanation:
Let's say Mark works for x hours. For each hour he works, 9.75 dollars are added to Mark's salary. Therefore, for 1 hour, he gets $9.75, for 2 hours, he gets $9.75 + $9.75 = $9.75 * 2 = $19.50, and for x hours, he gets $9.75 * x as his salary.
We want his salary to be more than $195, so we have $9.75 * x (his salary) > $195, which can be written as 9.75x > 195
divide both sides by 9.75 to solve for x
x > 20
Answer:
D - 10
Step-by-step explanation:
15x - 30 = 10x + 20
15x = 10x + 50
5x = 50
x = 10
D) 100; because 4 does not go into 25 and 50, while 25 does not go into 80.