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Colt1911 [192]
3 years ago
5

A rectangular room is 3 meters longer than it is wide, and its perimeter is 22 meters. Find the dimension of the room. The lengt

h is : meters and the width is: meters.
Mathematics
1 answer:
lyudmila [28]3 years ago
4 0

Answer:

Width = 4 m

Length = 7 m

Step-by-step explanation:

given:

perimeter of a rectangle = 22m

L = 3 + W

perimeter = 2L + 2W

perimeter = 2 (3 + W) + 2W

22 = 6 + 2W + 2W

22 - 6 = 4W

W = 16 / 4

W = 4 m

L = 3 + W

L = 3 + 4

L = 7 m

check:

perimeter = 2L + 2W

22 = 2(7) + 2(4)

22 = 14 + 8

22 = 22  ---- OK

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vlada-n [284]

Answer:

5.2307 %

Step-by-step explanation:

(acutal mass- estimated mass) / ( estimated mass)

7 0
3 years ago
4. Multiply or divide : i) (a+b) (a-b) ii) (4b +5a) ÷ 2 b​
IgorC [24]

Answer:

1. a²-b²

2.4b² + 5ab/2

Step-by-step explanation:

1:. it's a formula of a²-b² so, it can be solved like this and

2: I'm not sure about 2nd one

4 0
3 years ago
An amount of $4000 is invested. The interest rate is 2%. What is the amount earned in one year ?
nasty-shy [4]
Interest = PRT/100
Compound interest = P(1 + (R/100))^T

Where P = Principle ( amount )
R = Rate
T = Time

Since the time is only 1 year, the answer will be the same for both interest and compound interest formulae.

∴ 4000(2)(1)/100 =$80 (This is the interest value)

Note if question ask you what is the total amount after x years, be sure to add the interest with the principle.
6 0
3 years ago
Please do quick
ElenaW [278]

Answer:

$12

Explanation: 60 x .2= 12 + 60= $72

4 0
3 years ago
Algebraic Woru
mafiozo [28]

The right answer is Option D.

Step-by-step explanation:

Let,

Kyle's money = x

Hayden's money = y

Jeremy's money = z

According to statements;

Kyle has three times as much money in his savings account as  Hayden.

x = 3y   Eqn 1

Hayden has twice as much money in his savings account  as Jeremy.

z = 2y   Eqn 2

Combined Kyle, Hayden, and Jeremy have a total of  $612.

x+y+z=612   Eqn 3

Putting value of x and z from Eqn 1 and 2 in Eqn 3

3y+y+2y=612\\6y=612

Dividing both sides by 6

\frac{6y}{6}=\frac{612}{6}\\y=102

Putting in Eqn 1;

x=3(102)\\x=306

Kyle has $306 in his account.

The right answer is Option D.

Keywords: Linear equations, division

Learn more about linear equations at:

  • brainly.com/question/10703930
  • brainly.com/question/10772025

#LearnwithBrainly

6 0
3 years ago
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