Aidbr4asha3llcaitlyn Aidbr4asha3llcaitlyn

15-03-2017
Mathematics

contestada

The length of a rectangle is 1 inch less than twice the width. the area is 21 inches what is the length?

Respuesta :

Аноним Аноним

15-03-2017

width = w
length = 2w-1

Area = length * width
21 = (2w-1) * w
21 = 2w² - w
2w² - w - 21 = 0
2w² + 6w - 7w - 21 = 0
2w(w+3) - 7(w+3) = 0
(2w-7)(w+3) = 0

2w-7 = 0
w = 7/2 = 3.5 inch
length = 3.5*2 - 1 = 6 inch

Answer Link

Otras preguntas

On January 1, 20X1, Cello Co. established a defined benefit pension plan for its employees. At January 1, 20X1, Cello estimated the service cost for 20X1 to be

3. When 100 cm³ of 1.00 mol dm sodium hydroxide solution, NaOH(aq), is added to 100 cm³ of 1.00 mol dm hydrochloric acid, HCl(aq), the temperature increases fro

A bone mineral density test is used to identify bone density. The result is commonly measured as a Z score, which is normally distributed with a mean zero and s

jack and bob leave their houses at 10:00 am walking toward each other. they meet at 10:30 am. if their houses are 7km apart, and jack is walking at 8 km/h , fin

Write one paragraph that summarizes Booker T. Washington's views on segregation.

Compare the 3 types of worms: flatworms, roundworms, and segmented worms. How are they all similar?

if Jonny had 674 appes he gave away 379 how much does he have now?

Svp de laide pour cette exercice

What time does the clock show?

A sketch of y = cos x° for-360 ≤x≤360 is shown. a) State the coordinates of A. A b) State the coordinates of B. B B У O Ax