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3 years ago

The diameter of a US penny is 3/4 inch. How many pennies would it take to make a row of 42 inches long?

Mathematics

1 answer:

Anon25 [30]3 years ago

7 0

For the penny question the answer is 56

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If the ratio of red hair bands to green hair bands is 5 to 9 with a total of 70, how many are green

Eduardwww [97]

$5x-\ red\\9x-\ green\\\\5x+9x=70\\
14x=70\ \ \ | divide\ by\ 14\\\\
x=5\\\\
9x=9*5=45\\\\
There\ are\ 45\ green.$

5 0

3 years ago

Um, I don't really understand this can anyone help?

gladu [14]

Answer:

take the numbers in the () and turn them into a equation slope

Step-by-step explanation:

8 0

2 years ago

HELP ASAP I HAVE TO GET IT DONE Solve for x in the diagram below

MA_775_DIABLO [31]

Answer:

x = 35

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Geometry

Definition of a Line: A line is 180°

Step-by-step explanation:

Step 1: Set up equation

40° + (2x + 30)° + 40° = 180°

Step 2: Solve for x

Combine like terms: 2x + 110 = 180
Subtract 110 on both sides: 2x = 70
Divide 2 on both sides: x = 35

7 0

2 years ago

what is perpendicular to y= 3x -9 and passes through the point (3,1)

GREYUIT [131]

$(3,1) , \ \ y= 3x -9 \\ \\ The \ slope \ is :m _{1} =3 \\ \\ If \ m_{1} \ and \ m _{2} \ are \ the \ gradients \ of \ two \ perpendicular \\ \\ lines \ we \ have \ m _{1} \cdot m _{2} = -1 \\ \\3\cdot m_{2}=-1 \ \ /:3\\ \\ m_{2}=-\frac{1}{3}$

$\Now \ your \ equation \ of \ line \ passing \ through \ (3,1) would \ be: \\ \\ y=m_{2}x+b \\ \\1=-\frac{1}{ 3} \cdot3 + b$

$1=-1+b\\ \\ b=1+1\\ \\b=2 \\ \\ y =- \frac{1}{3}x+2$

6 0

3 years ago

Can someone answer this? Thanks a lot

Komok [63]

Answer:

Step-by-step explanation:

Use math-way go quick and easy answers without step by step explanations, and use math-soup-calculator for step by step explanation

3 0

3 years ago

Read 2 more answers