The price of a car has been reduced from $10,500 to $6,300. what is the percentage decrease of the price of the car ?

a. 40%

b. 60%

c. 42%

d. 4%

40%

Step-by-step explanation:

Percentage decrease=(10500-6300)/10500 × 100

Percentage decrease=4200/10500×100/1

Percentage decrease=(4200×100)÷(10500×1)

Percentage decrease=420000÷10500

Percentage decrease=40

Step-by-step explanation:

Side 1 = a

Side 2 = b

Side 3 = c

a = 2b

c = 5ft. + b

a + b + c = 49 feet

Substitute

2b + b + 5ft + b = 49 ft

Add the b’s

4b + 5ft = 49ft

Subtract 5ft from both sides of the equation

4b = 44ft

Divide both sides of the equation by 4 to isolate b

b = 11ft

a = b * 2 = 11 * 2 = 22ft

c = 49ft - 11ft - 22ft = 16ft

Hope this helps :)