Quantitive Literacy WGU D771 (Elementary Education) with complete verified solutions

Variable

a symbol, usually a letter, representing an unknown number

Constant

a fixed value that does not change

Coefficient

a number that is multiplied by a variable

Expression

does not contain an equal sign, can be simplified, ex: 4+3, x-21, 3a+56

Equation

contain an equal sign with an expression on either side, solved to find the value, ex:4+3=5+2, x+10=25, 3m-7=n+1

How to change a whole number to a decimal

move the decimal over to the right 2 times

Equations require the ________ to match

UNITS (you can't have inches and feet in the same equation so you have to convert inches to feet)

Ratio

a unit relates a value to a specific quantity of a thing

Units

are objects like people or cars or measurements

The top of a fraction is called the

numerator

The bottom of a fraction is called the

denominator

How do you simplify a fraction

divide by the common factor

When adding and subtracting fractions what must be the same?

The denominators

When multiplying and dividing fractions do the denominators have to be the same?

NO

Rates

a ratio that relates values with different units ex:portable restrooms per person

Function

a relation of each value of one variable to a value of another variable

Slope Intercept form

y=mx+b

Area of a circle equation

pi x radius^2

Simple interest equation

I = Prt

compound interest equation

A=P(1+r/n)^nt

Area equation

Length x Width

Perimeter equation

Add all the sides together

angle

the tilt or slant where a line intersects another line, measured in degrees, ranging from 0 degrees to 360 degrees

Volume equation

V=L x W x H

Complementary angle

either of 2 angles whose sum is 90 degrees

Supplementary angle

either of 2 angles whose sum is 180 degrees

Parallel lines

intersecting lines

perpendicular lines