Answer:
1,3,4. For every 10 students there is 1 teacher. Another example would be 50 students to 5 teachers.
-7v+5<u>></u>-79
add 7v to both sides
5<u>></u>7v-79
add 79 to both sides
84<u>></u>7v
divide both sides by 7
12<u>></u>v<u>
</u>v<u><</u>12<u>
</u>
A. cuz 7+7=4 ; everything else would be equal to or larger than 15.
Find the unit rate for each Olivia and Ryan:
2 2/5 km 15 36 km
------------ * ------- = ------------ = 3.6 km/hr (Olivia)
2/3 hr 15 10 hr
4 1/2 km 2 9 km
------------- * --------- = --------- = 3 km/hr (Ryan)
1 1/2 hr 2 3 hr
Olivia walked 0.6 km/hr faster than did Ryan.
