Maggie bought c CDs for $12 each, b books for $7 each, and a purse costing $24. a. Write an expression to show the total amount of money Maggie spent.

b. If Maggie bought 4 CDs and 3 books, how much money did she spend?

A. 12c + 7b + 27

B. $96

Step-by-step explanation:

We know each CD costs $12 but we don't know the amount. This term can be written as 12c with c standing for the number of CDs.

We also know each book costs $7 but we don't know the amount either. This term can be written as 7b with b standing for the number of books.

We know Maggie only buys 1 purse for $24 so we can leave this term as $24.

Adding all these terms gives us our expression:

12c + 7b + 27

We plug in 4 for c and 3 for b to into the expression and solve for the total money spent.

12(4) + 7(3) + 27

48 + 21 + 27= 96

Maggie spent $96.

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be