4y=7x
The sum of the numbers is 22
so, x+y=22
x=(22-y)
by substitute (22-y) for x in the first equation.
Answer:
z=5
Step-by-step explanation:
Answer:
18 km/hr
90 km
Step-by-step explanation:
We know that there are
1000 m = 1 km
and
3600 s = 1 hr
We need to convert m/s to km/h
5 m 3600s 1 km 18000km 18 km
------ * ------------ * ------------ = --------------- = ------------
s 1 hr 1000m 1000 hr hr
It is 18 km/hr since the units cancel.
We want to know how far the cyclist travels
d=rt
We know the rate 18km/hr and the time = 5 hr
d = 18 km/hr * 5 hr
d =90 km
The percentage of male students is 37.5%
- There for every five girls there are three boys.
- That is eight students per.
- I took two hundred and divided it by eight to get twenty-five.
- I got twenty five, if you take twenty-five times three you get seventy-five & if you take twenty-five times five you get one hundred twenty-five.
- Add those two products and you'll have your two hundred.
- So, take seventy-five over two hundred to get thirty-seven and a half.
- Divide that by one hundred to get the ratio.
- It comes out to 37.5%
