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
Fynjy0 [20]
3 years ago
12

The height of a triangle is 4 ft less than the base x. The area is 126 ft2. Find the dimensions of the triangle.

Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

Base = x = 18ft

Height = x - 4 = 14ft

Step-by-step explanation:

The formula for the area of A the triangle is given by the following equation:

1) A = (base * heigth)/(2)

From this problem, we know that

base = x and that the height is 4ft less than the base, so height = base - 4 = x - 4.

We also know that the area is 126ft², so A = 126 ft². Now we can replace these informations in equation 1).

126 = (x(x-4))/2

x² - 4x = 252

x² -4x - 252 = 0

The roots of this equation are x = 18 or x = -14. But we know that a triangle cannot have negative dimensions, so we use x = 18.

The base is x, so base = 18ft.

Height is 4ft less than the base, so height equals 18-4 = 14ft

You might be interested in
An expression to convert 50 miles per hour to miles per minute is shown.
Nataliya [291]
Use the fact that 1 hour = 60 minutes, from which you can create your conversion factor: 1 = hour / 60 minutes. That permit you to multiply the number of miles per hour times [1 hour/60minutes] to convert 50 miles per hours to miles per minute. This is the calculation: 50 miles/hour * [1hour/60minures] = 0.833 miles / minute
8 0
3 years ago
Read 2 more answers
15. a)
frutty [35]

Answer:

The correct answer is - A)8% B) 3%

Step-by-step explanation:

A) Let assume:

the cost price of the goods - $y.

the selling price of the goods - $x.

Given: The retailer sold at 4% discount, or 0.96x (100% - 4% = 96%). Since the goods were sold to make 20% profit, therefore it was sold for:

1.2y (100% + 20% = 120%).

Solution:

The refrigerator was sold at 13% VAT at Rs. 10848:

then,

=> 1.2y + 13%(1.2y) = 10848

=> 1.2y + 0.156y = 10848

=> 1.356y = 10848

=> y = 8000

Thus, the cp is Rs 8000.

The selling price is:

=> 0.96x = 1.2y

=> 0.96x = 1.2(8000)

=> x = 10000

The sp is Rs. 10000

For a profit of 15%, that is 1.15(8000) = 9200, the discount is:

(1 - discount)10000 = 9200

1 - discount = 0.92

Discount = 1 - 0.92 = 0.08 or 8%

B) Let C & M as cost price & marked price of the scanner machine respectively.  

(1 + 20/100)*C = 41400

or (6/5)*C = 41400

or C = (5/6)*41400

= 34500 (Rs)

(1 - 10/100)*(1 + 15/100)*M = 41400

or (9/10)*(23/20)*M = 41400

or M = (10/9)*(20/23)*41400

= 40000 (Rs)

Let R% as the reduction in the percent in discount  

(1 - 10/100 + R/100)*(1 + 15/100)*M

= (1 + 20/100 + 4/100)*C

or (9/10 + R/100)*(23/20)*40000

= (31/25)*34500

or 9/10 + R/100

= (20/23)(31/25)*(345/400)

or R/100 = 0.93 - 0.9 = 0.03

or R = 3%

7 0
3 years ago
joe has a collection of 35 dvd movies. he received 8 of them as gifts. joe bought the rest of his movies over 3 years . if the b
ozzi
About 12 I'm not sure though.
8 0
3 years ago
Read 2 more answers
Helps please does that look right to y’all ?
ladessa [460]
<h3>You have the correct answer</h3><h3>Interest rate = 21.5%</h3>

===============================================

Work Shown:

i = P*r*t .... simple interest formula

i = simple interest

i = 2075-1000 = 1075

P = 1000 = amount borrowed (principal)

r = unknown interest rate

t = 5 = time in years

So,

i = P*r*t

1075 = 1000*r*5

1075 = 5000r

5000r = 1075

r = 1075/5000

r = 0.215

r = 21.5%

5 0
3 years ago
A cockroach traveling 2 feet per second takes how long to scurry a distance of 46 feet?
Fittoniya [83]

Answer:

23 Seconds

The roach is going 2 feet per second so you can split the amount of feet in half because he will go the same distance 2 times as fast.

5 0
3 years ago
Other questions:
  • A polynomial has a leading coefficient of -4 and is a sixth-degree monomial. Name the expression that represents this polynomial
    9·1 answer
  • Thirteen students entered the business program at Sante Fe College 2 years ago. The following table indicates what each student
    14·1 answer
  • How do u find this??????????????????????/
    7·2 answers
  • if you had a coupin for 12% off a meal &amp; if you were charged 11$ what was the original price of the meal?
    13·1 answer
  • a table was sold at 20%loss but had it sold for RS 160 more these would have been a profit 20%. find cp​
    15·1 answer
  • If x=2 centimeters, y=4 centimeters, and z=5 centimeters, what is the area of the object?
    9·1 answer
  • Solve the equation by completing the square. Round to the nearest hundredth if necessary.
    15·1 answer
  • The areas of the bases of similar rectangular prisms are 49 square inches and 81 square inches.
    14·1 answer
  • What is m O M ZABC = 60°<br> OM ABC = 67°<br> OM ZABC = 120°<br> O M ABC = 127°
    14·1 answer
  • What is the exponential function that best models the number of gnats the scientists have
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!