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3 years ago

13

Two thirds times a number plus fifteen totals nine. what is the number?

1 answer:

kondor19780726 [428]3 years ago

8 0

Let x represent the number:

2/3(x)+15=9

2/3(x)= -6

x= -6/(2/3)

x= -6*(3/2)

x= -9

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I need help please help

Lemur [1.5K]

Answer:

2.24

Step-by-step explanation:

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3 years ago

The length of a rectangle is 5 less than twice the width. If the perimeter of the rectangle is 146 cm, find the dimensions of th

Marta_Voda [28]

Length = 2x - 5

Width = x

Perimeter = 146

P = 2L + 2W

146 = 2(2x - 5) + 2x

146 = 4x - 10 + 2x

146 = 6x - 10

146 + 10 = 6x

156 = 6x

156/6 = x

26 = x

Length = 2(26) - 5

Length = 52 - 5

Length = 47 cm

Width = x

Width = 26 cm

Did you follow?

4 0

3 years ago

PLZZ help me out and u get brainliest

kompoz [17]

Hey you're answer is

18 cm

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8 0

3 years ago

Read 2 more answers

On a certain hot summer day, 738 people used the public swimming pool.The daily prices are 1.50 for children and 2.00 for adults

Artemon [7]

Answer:

A = 340 adult.

C = 398 children.

Step-by-step explanation:

Let the number of children be C

Let the number of adults be A

Translating the word problem into an algebraic equation, we have;

A + C = 738 .......equation 1

1.5C + 2C = 1306 .......equation 2

A = 738 - C .......equation 3

Substituting eqn 3 into eqn 2, we have;

1.5(738 - C) + 2C = 1306

1107 - 1.5C + 2C = 1306

1306 - 1107 = 2C - 1.5C

199 = 0.5C

C = 199/0.5

<em>C = 398 children. </em>

Now, to find the value of A.

From equation 3;

A = 738 - C

A = 738 - 398

<em>A = 340 adult. </em>

7 0

3 years ago

Help plz i need this done

Romashka [77]

Answer:

x ≈ 11.5

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

<u>Trigonometry</u>

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] sin∅ = opposite over hypotenuse

Step-by-step explanation:

<u>Step 1: Identify Variables</u>

Angle = 35°

Opposite Leg = <em>x</em>

Hypotenuse = 20

<u>Step 2: Solve for </u><em><u>x</u></em>

Substitute [sine]: sin35° = x/20
Isolate <em>x</em>: 20sin35° = x
Evaluate: 11.4715 = x
Rewrite: x = 11.4715
Round: x ≈ 11.5

5 0

3 years ago