brooklyn4932 brooklyn4932

06-06-2019
Mathematics

contestada

The height of a triangle is 5 m less than its base. The area of the triangle is 42 m². Find the length of the base.
7m
8 m
11 m
12 m

Respuesta :

rodja224 rodja224

06-06-2019

Answer

D, 12m

Step-by-step explanation:

Answer Link

MathPhys MathPhys

06-06-2019

Answer:

12 m

Step-by-step explanation:

Area of a triangle is:

A = ½ bh

Given that h = b - 5 and A = 42:

42 = ½ b (b - 5)

84 = b² - 5b

0 = b² - 5b - 84

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

b = -7, 12

The length of the base can't be negative, so b = 12 m.

Answer Link

Otras preguntas

Which choice is the most accurate definition of a theme? a. A theme is a life lesson the author learns from a narrative.b. A theme is a life lesson the antag

As world war l was unfolding In Europe, why did president Wilson insist that America stay neutral? He believed the war overseas had nothing to do with the Unite

Which of the following is the inverse operation of subtraction? Factoring Addition Multiplication Division

A car averages 27 miles per gallon. If gas costs $4.04 per gallon, which of the following is closest to how much the gas would cost for this car to travel 2,727

How many moles of tris react with one mol of hcl?

What is the mass of 22.4 L of H2O at STP? A. 18.02 g/mol B. 1.24 g/mol C. 24 g/mol D. 100 g/mol

Systems of equations, help please?

Security onion is composed of which two components

What is the volume of a sphere with a radius of 2 cm? use 3.14 for π. round to the nearest hundredth, if needed?

System of quadratic equations 3 variables how to