First of all, the average speed is the ratio between the distance traveled and the time elapsed. So, the average speed of a car that travelled 720 kilometers in 6 hours is
kilometers per hour.
As for the second exercise, you can simply write this proportion:
Because we expect the distance traveled in 3 hours to be proportional to the distance traveled in 2 hours, if the (average) speed is the same.
Solving for x, we have
Answer:
(-2, -4), (-1, -1), (0, 0), (1, -1), (2, -4)
Step-by-step explanation:
You plug in x values to get the y values are dot-in the points!
y = -x^2
You plug in -2 and get -(2)^2 = -(4) = -4
Same thing with all other values.
Answer:
On problem one the answer is 4 but I'm not sure about the second problem
Answer:
bots/total = 3/8
Step-by-step explanation:
There are 15 girls and 9 boys
15+9 = 24 total students
boys/total = 9/24
Divide the top and bottom by 3
= 3/8
Answer:
√157
Step-by-step explanation:
Use Pythagorean theorm.
121 + 36 = ?^2
157 = ?^2
√157 = ?
Can't simplify.