Mary's age is 10 years less than 2 times Joe's age. If the difference between their ages is 30, how old is Mary?

its 5

Step-by-step explanation:

cause 2 divided by 30is 15 minus 10 its 5

m=mary age

j=joe age

m=2j-10

m-j=30

rewrite

m=2j-10

m=j+30

so that means that

2j-10=j+30

-j

j-10=30

+10

j=40 so lets plug this in

m=2(40)-10

m=70

Hope This Helps!!!

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

8y^50

step-by-step explanation: