isaic6875 isaic6875

20-04-2017
Mathematics

contestada

Jamar is four times as old as Josh. In 20 years he will be twice as old as Josh. How old is Jamar?

Respuesta :

anmonymous anmonymous

20-04-2017

simultaneous equations
Jamar=J
Josh=j
4J=j
20+J=2j
Then
4J=j
-4 (J)=-4(2j-20)
So
0=-7j+80
7j=80
j=80÷7

Answer Link

Otras preguntas

Which concept emphasizes development resulting from ongoing bidirectional exchanges between heredity and all levels of the environment?

What is a summary you learned about about imperialist United States

Suppose an ideal gas is in a container 8.0 l in volume and allowed to expand by having a piston move. The final volume after the piston moves is 16.0 l. If the

What role did samuel gompers play in union growth?

What variable expressions is a translation of the word phrase "three less than the product of a number and six?

y varies jointly as a and b and inversely as the square root of c y=96 when a=8 b=6 c=16 find y when a=7 b=5 c=25

Which of the following is a theme of Macbeth? A: Firm beliefs will help you succeed.B: Things are not always what they seem.C: Friendship can withstand any chal

Lucy is convinced she smells rotten eggs, but no one in the house can smell the odor. lucy's sensation is known as phantom:

The main goal of the Americanization movement was to

A loss of $500 in stock market is worse than a gain of 200 in the stock market