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
Dafna11 [192]
3 years ago
6

the lengths of the sides of a triangle are x, x - 5, 3x centimeters. if the perimeter is 80 centimeters, what is the value for x

?​
Mathematics
1 answer:
dangina [55]3 years ago
4 0

Answer:

x= 17cm

Step-by-step explanation:

given:

sides of a triangle:

x, x-5, 3x

perimeter= 80cm

perimeter of a triangle= side + side + side

80 = x + (x-5) + (3x)

80 = x + x + 3x -5 ------------->(rearranging the like terms together)

80 = 5x - 5

80+5 = 5x

85 = 5x

85/5 = x

17cm = x

You might be interested in
Evaluate (3.5×10^13)-(1.4×10^12)/3×10^9
maw [93]

Answer:

11,200

Step-by-step explanation:

At first we use "BODMAS" rule.

Given,

(3.5×10^13)-(1.4×10^12)/3×10^9

So, we will break the brackets at first. With the help of excel, we can get the desired result. The following images will show you the step-by-step result.

Use "Number" instead of "general" in the excel sheet. You can use calculator too.

7 0
3 years ago
n aquarium holding African cichlids is 6 inches higher than it is wide. Its length is 33 inches, and its volume is 9240 cubic in
sukhopar [10]

Answer: Height = 20 inches

Width = 14 inches

Step-by-step explanation:

The aquarium is rectangular. The formula for determining the volume of a rectangular box is expressed as

Volume = LWH

Where L,W and H represents the length, width and height of the box.

The aquarium holding African cichlids is 6 inches higher than it is wide. It means that

H = W + 6

Its length is 33 inches, and its volume is 9240 cubic inches. It means that

9240 = 33W(W + 6)

9240/33 = W(W + 6)

280 = W² + 6W

W² + 6W + (6/2)² = 280 + (6/2)²

(W + 3)² = 280 + 9 = 289

Taking square root of both sides, it becomes

W + 3 = √289 = 17

W = 17 - 3

W = 14

H = W + 6 = 14 + 6

H = 20

3 0
3 years ago
Identifying Cross Sections of Solids
NARA [144]
Prisms is the answer for the question
7 0
2 years ago
Can someone please give me a lesson on angles of depression and elevation?
Romashka-Z-Leto [24]

Answer:

Angles of depression and elevation

The term angle of elevation denotes the angle from the horizontal upward to an object. The term angle of depression denotes the angle from the horizontal downward to an object. ... An observer's line of sight would be below the horizontal.

Step-by-step explanation:

I hope it's help u

8 0
3 years ago
A. Steven wrote an expression with 2 terms. The second term, which is the whole number 7, is subtracted from the first term. The
bulgar [2K]

Answer:

Part a)

Steve's expression is 2(2x+5)^{2}-7

For x=3, the expression is equal to 235

Part b)

Jasmine's expression is

(3x^{2})+(25x)

For x=2, the expression is equal to 62

Step-by-step explanation:

Part a)

Let

n-----> the first term

The expression is

(n-7)

n=2(2x+5)^{2}

substitute

Steve's expression is

2(2x+5)^{2}-7

Evaluate for x=3

2(2(3)+5)^{2}-7=242-7=235

Part b)

Let

n-----> the first term

Jasmine's expression is

(3x^{2})+(25x)

Evaluate for x=2

(3(2)^{2})+(25(2))=12+50=62

4 0
3 years ago
Other questions:
  • Brian invests £4700 into his bank account.
    15·1 answer
  • A rectangular prism has a width of 16 inches and a length of 10 inches. The volume of the rectangular prism is decreasing at a r
    7·1 answer
  • The rectangle has a total area of (4x + 36) square feet. factor 4x+ 36
    14·2 answers
  • PLEASE HELP! Quick Math Question!!
    6·1 answer
  • Find the LCM of 9,25,36 and 73 ?​
    14·2 answers
  • 6 + 23 • 3 =? on e2020
    6·2 answers
  • How do you write 3.4 in expanded form
    6·2 answers
  • Roy is 30 miles from dallas ready to leave for pecos
    11·1 answer
  • 10-<br> 5-<br> -10<br> -5<br> 5<br> 10<br> -10-<br> What is the equation
    14·2 answers
  • Does anyone how to solve this sum? It’s urgent
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!