There are 80 new houses being built in a neighborhood. Last month, 2/5 of them were sold. This month, 3/4 of the remaining houses were sold. How many houses are left to be sold?

12 houses are left to be sold.

Step-by-step explanation: The starting number is 80 units of houses. Last month, 2/5 of them were sold which means, houses sold last month were

Houses sold = 2/5 x 80

Houses sold = 32

If 32 houses were sold, then the houses left over were 80 - 32 which equals 48.

This month, 3/4 of the remaining houses were sold which means 3/4 of 48 houses.

Houses sold = 3/4 x 48

Houses sold = 36

If out of the remainder of 48 houses, 36 were sold, then houses left over would be

Left over = 48 - 36

Left over = 12.

Finally, there were 12 houses left to be sold

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

rx and sx

step-by-step explanation: