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3 years ago

Why do you think rates are usually written as unit rates?

1 answer:

8 0

A rate is a ratio of two quantities: miles per hour, calories per cookie,dollars per person, ... a unit rate just specifies the units (miles, hours) of<span> the two quantities.</span>

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How should I solve for x and what is x?

algol [13]

Answer:

x =12

Step-by-step explanation:

We can use the Pythagorean theorem to solve for x

a^2 + b^2 = c^2

16^2 + x^2 = 20^2

256 +x^2 = 400

Subtract 256 from each side

256-256 +x^2 = 400-256

x^2 =144

Take the square root of each side

sqrt(x^2) =sqrt(144)

x = 12

8 0

3 years ago

(Can someone help I'm taking a math quiz.) Seventy parents showed up for a parent meeting at school. Mrs. Quinn set up 12 tables

il63 [147K]

Answer:

for every 2 tables there are 10 chairs, so for 12 tables there are 60 chairs

4 0

3 years ago

Read 2 more answers

Solve the system by substitution.

kirill [66]

<h2>Answer:</h2>

x = 1

y = 1

<h3>Step-by-step explanation:</h3>

$y=-3x+4\\ y=x$

Substitute into one of the equations

$-3x+4=x$

Rearrange variables to the left sider of the equation

$-3x-x=-4$

Combine like terms

$-4x=-4$

Divide both sides of the equation by the coefficient of variable

$x=\frac{-4}{-4}$

Determine the sign for multiplication or division

$x=\frac{4}{4}$

Cross out the common factor

$x=1$

Substitute into one of the equations

$y=1$

The solution of the system is

$\left \{ {{x=1} \atop {y=1}} \right.$

<em>I hope this helps you</em>

8 0

2 years ago

Identify the vertex and the y-intercept of the graph of the function y= -0.25(x-4)-2

Gennadij [26K]

The y intercept is -2, but I don't remember how to find the vertex sorry

3 0

3 years ago

Read 2 more answers

A marble is selected at random from a jar containing 4 red marbles, 2 yellow marbles, and 3 green marbles.

s344n2d4d5 [400]

Answer:

4 / 9 probability of getting a red

Step-by-step explanation:

How many marbles are there total?

4 red + 2 yellow + 3 green = 9 marbles total

P( red marble) = 4 red / 9 total = 4/9

7 0

4 years ago

Read 2 more answers