jgrantepic5 jgrantepic5

06-03-2017
Mathematics

contestada

The sum of Sally and Beth's age is 60. Six years ago, Sally was 3 times as old as Beth. What are their present ages?

Respuesta :

Аноним Аноним

06-03-2017

It's quite simple. Look:

Lets let S- be the age of Sally and B- can be the age of Beth

S+B=60
S-6=3(B-6)

S-6=3B-18
S=3B-18+6
S=3B-12

3B-12+B=60
4B=60+12
4B=72
B=72/4
B=18

B=60-18
B=42

The ages are (B)18 and (S)42

Hope this helps!! :)

Answer Link

Otras preguntas

Molarity is represented by the symbol m true or false?

Genetic engineering can be used to create more productive strains of farm animals. By adding genes to an animal’s DNA, the animal can be made to produce milk or

Are the items listed below renewable or nonrenewable resources? N—nonrenewable resource R—renewable resource coal gold oxygen petroleum soil

Adult tickets to the fall play cost $8 and student tickets cost $4. The drama class sold 30 more adult tickets than student tickets to the fall play. If the cla

In what room does the following item belong: el microondas A)en la cocina B)en el jardín C) en el refrigerador D)en el lavaplatos

What is the measure of the missing side of the right triangle?

The invention of the automobile influenced where people could live.

Using all 8 characteristics, explain why a cow is considered living where as a tractor is not.

In $\triangle abc$, points $x$ and $z$ are on $\overline{ab}$ and $y$ is on $\overline{ac}$ such that $\overline{xy}\parallel \overline{bc}$ and $\overline{zy}\

Max points: 5.0 where do atheism and christianity agree and disagree on views of the origin of the universe?