miapackard miapackard

04-04-2017
Mathematics

contestada

The height of a triangle is 5 m less than its base. The area of the triangle is 42 m².

What is the length of the base?

Respuesta :

04-04-2017

A=bh/2, h=b-5 so

A=(b/2)(b-5)

A=(b^2-5b)/2 and A=42 so:

(b^2-5b)/2=42

b^2-5b=84

b^2-5b-84=0

b^2-12b+7b-84=0

b(b-12)+7(b-12)=0

(b+7)(b-12)=0 and since b>0

b=12m

Answer Link

burnettmorgan burnettmorgan

01-04-2020

Answer:

B=12m

Step-by-step explanation:

Answer Link

Otras preguntas

What was the direct cause of the U.S. entry into World War II? A. the bombing of Pearl Harbor B. the invasion of Poland by Germany C. the capture of Belgiu

What was the name given to the members of Parliament during the English civil war? A. Parliamentarians c. The roundheads b. The Presbyterians d. The puritans Pl

Please help Can someone answer and tell me how to do this (Will mark brainliest)

Quadrilateral FGHJ is dilated according to the rule DO,(x,y) to create the image quadrilateral F'G'H'J', which is not shown. What are the coordinates of poin

Why did Reagan have the United stars invade Grenada

Plz help pe with this guys, thank you.

The passing of heat through a material while the material itself stays in place. A. radiation B. conduction C. convection

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

Acquired mutations can result from _____. radiation pollution toxins inheritence Select all that apply

whats four fifths to the first power