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2 years ago

The perimeter of rectangle living room is 40 m the living room is 10 m wide what is the length of the living room

Mathematics

1 answer:

Yuri [45]2 years ago

8 0

Answer:

Width of the room = 5 meters

Step-by-step explanation:

the rectangular living room is calculated as length * width

The area is given to be equal to 40 sq. meters (area = 40 sq. meters)

Let the width = x meters

Length = X+3 meters

Area = Length * Width

40 = X * (X+3)

40 = X^2 + 3X

We solve this quadratic equation

So x = 5 or x= -8

Width cannot be negative, so we reject x =-8

So x = 5 is the answer

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pashok25 [27]

Most of the square numbers are even.so if we need to find root over we need an even number to convert it to perfect square.

See the example below

$\\ \ast\bull\rm\longmapsto H^2=P^2+B^2$

$\\ \ast\bull\rm\longmapsto H^2=3^2+4^2$

$\\ \ast\bull\rm\longmapsto H^2=9+16$

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Some other triplets are

(6,8,10)
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2 years ago

Which of the following statements is true for ∠a and ∠b in the diagram?

Iteru [2.4K]

Answer:

B because they are the same angle

8 0

2 years ago

Read 2 more answers

Simplify completely****

andreyandreev [35.5K]

Answer:

$\displaystyle \frac{x + 7}{3}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms/Coefficients
Factoring

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{x^2 + 12x + 35}{3x + 15}$

Step 2: Simplify

[Fraction] Factor numerator: $\displaystyle \frac{(x + 5)(x + 7)}{3x + 15}$
[Fraction] Factor denominator: $\displaystyle \frac{(x + 5)(x + 7)}{3(x + 5)}$
[Fraction] Divide: $\displaystyle \frac{x + 7}{3}$

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3 years ago

Please help me with this question image attached

Mumz [18]

Answer: (D) 9

Step-by-step explanation:

This is an isosceles triangle. Since the legs are congruent, then the base angles are congruent.

9x + 3 = 84

- 3 -3

9x = 81

÷9 ÷9

x = 9

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3 years ago

The u.s. dairy industry wants to estimate the mean yearly milk consumption. a sample of 16 people reveals the mean yearly consum

lidiya [134]

1-2. The best estimate for the population mean would be sample mean of 60 gallons. Since we know that the sample mean is the best point of estimate. Since sample size n=16 is less than 25, we use the t distribution. Assume population from normal distribution.

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4. xbar ± t*s/vn = 60 ± 1.75*20/4 = ( 51.25, 68.75)

5. Since the interval include 63, it is reasonable.

3 0

2 years ago