sillixmadi24x7oqxqoa sillixmadi24x7oqxqoa

15-07-2017
Mathematics

contestada

randy made a business trip of 204 miles. he averaged 52 mph for the first part of the trip and 50 mph for the second part. if the trip took 4 hours, how long did he travel at each rate?

Respuesta :

musiclover10045 musiclover10045

15-07-2017

x+y = 4

x=4-y

52x+50y=204

52(4-y)+50y=204

208-52y+50y=204

208-2y=204

-2y=-4

y=2

x= 4-2=2

check 52*2=104

50*2 = 100

104+100=204

so he traveled 2 hours at both 50 and 52 mph

Answer Link

Otras preguntas

jada was filling several same sized containers with coleslaw. after emptying a 33-oz blow, she had filled 5 1/2 containers contain the same amount of coleslaw,

Given the duration of her symptoms, what components of her immune system are most active at this time?

Estimate the given quantity. (Round your answer to three decimal places.) π f(x) = 7eˣ π; estimate π f'(1)f'(1) π. a) 7 b) 14 c) 21 d) 28

A supplier of domestic solar panels has these installed by one of two installers. The supplier has 85?

Can ovarian cysts cause weight gain?

How can a teacher effectively create activities that meet the needs of several different students at once? a) Ensure that skills and concepts are presented in m

How might the water cycle might be able to purify or clean some water that is dirty or contaminated?

Alexandria Company's master budget sales were $212,000. Actual sales were $207,000. Sales in the prior year were $210,000. The master budget variance for sales

the new training program has been implemented

Abcd si four digit number. ni which each letter indicates adifferent digit. nine times of this number si another four digit number dcba. what si the digit value