How many boys are there in an introductory biology course if 396 students are enrolled and there are four boys to every five girls?

176 boys

Step-by-step explanation:

boys(4) + girls (5) = 9

396 / 9 = 44 (group to 4 boys and 5 girls)

44 x 4 (boys of group) = 176 boys in total

you should at least use a calculater

step-by-step explanation:

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