Grace earns $7 for each car she washes. she always saves 25$ of her weakly earnings. this week, she wants to have at least $65 in spending money. how many cars must she wash? write and solve an inequality to represent this situation

6 cars

Step-by-step explanation:

To write an inequality, write an equation using an inequality sign. She needs to make at lest $65 then the sign must be greater than to ensure to gets that much or more than it.

She starts the week with $25. Then adds $7 for each car. This value is changing and is represented with a variable, 7x.

So the equation is 25+7x > 65.

To solve, use inverse operations like solving an equation:

25+7x>65

7x>40

rounded x>6

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2