Petra is making necklaces to sell at a craft fair. the hardware for each necklace cost $3.75, and each bead cost $0.50. the number of beads petra needs depends on the the design she chooses. which expression gives the total cost to make 30 necklaces with b beads?

Let

h> number of hardware

b> number of beads

T> total cost for make necklaces

we know that

the total cost for one necklaces is equal to

T=3.75*h+0.50*b> h=1

T=3.75+0.50*b

so

the total cost for 30 necklaces is equal to

h=30

T=3.75*30+0.50*b> T=112.5+0.50*b

therefore

the answer is

The expression is equal to

T=112.5+0.50*b

Let

h> number of hardware

b> number of beads

T> total cost for make necklaces

we know that

the total cost for one necklaces is equal to

T=3.75*h+0.50*b> h=1

T=3.75+0.50*b

so

the total cost for 30 necklaces is equal to

h=30

T=3.75*30+0.50*b> T=112.5+0.50*b

therefore

the answer is

The expression is equal to

T=112.5+0.50*b

For this case, we have by definition, if two lines are parallel, then their slopes are equal.

IF we have the line:

Whose slope

Then, the slope of a line parallel to it will be:

So, we have the equation:

We substitute the given point to find the cut point:

Finally the equation is: