The length of a retanle is twice the width plus 10. if the perimenter of the rectangle must be 200 inches what is the maimumarea of the rectange?

Explanation:

The length of a rectangle is twice the width plus 10

Let L be the length and W be the width.

               L = 2W + 10

The perimeter of the rectangle must be 200 inches

           Perimeter = 2 (L+W) = 200

                              2(2W+10+W) = 200

                                 3W + 10 = 100

                                 3W = 90

                                    W = 30 inches

                 L = 2 x 30 + 10 = 70 inches

Area = Length x Width

Area = 30 x 70

Area = 2100 inch²

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg