balindawmcdotlzzo balindawmcdotlzzo

13-08-2017
Mathematics

contestada

Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?

Respuesta :

Аноним Аноним

13-08-2017

solve the equation 1/30 + 1/45 = 1/x

where x is the required time

multiply thru by 90x:-

3x + 2x = 90

x = 90 / 5 = 18

answer 18 minutes

Answer Link

Otras preguntas

If x = -5, then |x - 7| = A: -12 B: 2 C: 12 D: -2

How many 4-digit numbers are there whose digit product is 60?

which of the following is a probable source of earths magnetic field? A. the sun B. the earths tides C. earths outer iron core D. the moon

what does it mean to 'stay the course'?

Find the slope: 4x - 5y = 20 A: 5/4 B: 4/5 C: -4/5 D: -5/4

Please explain how biotechnology can increase or decrease variation???

A patient is to receive 1.5 grams (g) of an antibiotic in 3 equal does. If tablets available are 250 milligrams (mg), how many tablets should the patient tak

An industrial cleaner is manufactured using only the 3 secret ingredients A, B, and C, which are mixed in the ratio of 2:3:5, respectively, by weight. How many

the himalaya mountains were formed in a collision at a A. fracture zone B. transform C. convergent D. divergent

Why the people consuming sea food do not suffer from goiter