1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sammy [17]
3 years ago
5

The height of a triangle is 2 less than 5 times it's base. If the base of the triangle is x feet, and the area of the triangle i

s 12 square feet, which equation models the situation
Mathematics
1 answer:
____ [38]3 years ago
6 0

Answer:

Area A = 12 = 1/2 × x × (5x-2)

5x^2 - 2x -24 = 0

Solution;

Base x = 2.4

Height h = 10 ft

Step-by-step explanation:

Given;

base of the triangle is x feet;

Base = x

The height of a triangle is 2 less than 5 times it's base;

Height = 5x - 2

the area of the triangle is 12 square feet;

Area A = 12 ft^2

The area of a triangle is;

Area A = 1/2 × base × height

Substituting the base and height;;

Area A = 1/2 × x × (5x-2)

Area A = 1/2 × (5x^2 - 2x)

Area A = 12

12 = 1/2 × (5x^2 - 2x)

Multiply through by 2.

24 = (5x^2 - 2x)

5x^2 - 2x -24 = 0

Solving the simultaneous equation;

x = 2.4 or -2

Since the base cannot be negative;

x = 2.4 ft

Height h = 5x -2 = 5(2.4) - 2 = 12 - 2 = 10 ft

Base x = 2.4

Height h = 10 ft

You might be interested in
7-c<1 ?? HELPPPP!!!MEEEeee
sesenic [268]

Answer:

c>6, since a negative coefficient reverses the sign

Step-by-step explanation:

7-c<1

-c<-6

c>6

5 0
3 years ago
Toby pulled weeds and earned $22.50 for three hours of work. How much will he earn tomorrow if he works for 2 hours?
postnew [5]
How many hours total?
8 0
3 years ago
Read 2 more answers
Find the slope of the line passing through the points (-6,7) and (-8,5)
kykrilka [37]

Answer:

Slope = 1

Step-by-step explanation:

4 0
2 years ago
Solving for systems: {y=3x+7 &amp;     y=5x-7
steposvetlana [31]
\left\{\begin{array}{ccc}y=3x+7\\y=5x-7\end{array}\right\\\\substitute:\\\\5x-7=3x+7\\5x-3x=7+7\\2x=14\ \ \ \ /:2\\x=7\\\\y=3\cdot7+7=21+7=28\\\\Answer:x=7\ and\ y=28.
8 0
3 years ago
Read 2 more answers
Can you find the values of A and B please.
Tom [10]

Answer:

3z

2

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • What is 16-2t=5t+9
    10·2 answers
  • Under what operations are the set of integers closed? Explain your answer.
    6·1 answer
  • A circle has a radius r=3 and a center at (3,-5). what is the general form of the circle
    14·1 answer
  • cards marked with numbers 2 to 101 are placed in a box and mixed thoroughly. one card is drawn from this box. find the probabili
    9·1 answer
  • Simplify the expression -5(x+2) using the distributive property
    7·2 answers
  • The volume of a cylinder is 4.txcubic units and its height is x units.
    14·1 answer
  • Find the slope of each line passing through the given points using the slope formula.
    15·1 answer
  • Help asaaaap explain please!!!!!
    11·1 answer
  • You are x year old. Write an expression to describe your uncle’s age
    9·1 answer
  • PLS HELP!!!<br> I attached the question in the picture below
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!