Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 2 Vocab

chapter 2 vocab

QuestionAnswer
addition property of equality adding the same number to each side of an equation produces an equivalent equation. x-3=2 x-3+3=2+3
conversion factor a ratio of two equivalent measures in different units. the ratio 1ft/12 in. is a conversion factor.
cross products in the proportion a/b=c/d the products ad and bc are called cross products. you can use following property of cross products to solve proportions.
cross products property the cross products of a proportion are equal. 3/4=9/12, so 3(12)=4(9), or 36=36
division property of equality dividing each side of an equation by the same nonzero number produces an equivalent equation. 5x=20 5x/5=20/5
equivalent equations equations that have the same solution. 9/3=3 and9/3 +a are equivalent equations
formula an equation that states a relationship among quantities the formula for the volume v of a cylinder is V=3.14^2h, where r is the radius of the cylinder and h is its height the formula for the volume V of a cylinder is V-3.14^2h, where r is the
identity an equation that is true for every value. 5-14x=(1-14/5x)
inverse operations operations that undo one another addition and subtraction are inverse operation.
isolate using properties of equality operations to get a variable with a coefficient of 1 alone on one side of the equation. x+3=7 x+3-3=7-3 x=4
literal equation A literal equation is an equation that involves two or more variables.
multiplication property of equality multiplying each side of an equation by the same nonzero number produces an equivalent equation. x/3=2 x/3.3=2.3
percent error the ratio of the absolute value of the difference of the measured value and an actual value compared to the actual value, expressed as a percent.
percent change the ratio of the amount of change to the original amount expressed as a percent. the price of a sweater was $20. the price increases $2. the percent change is 2/20=10%
percent decrease the percent change found when the original amount decreases the price of a sweater was $22. the price decrease $2. the percent change is 2/22~9%
percent increase the percent change found when the original amount increases.
proportion an equation that states that two ratios are equal 7.5/9=5/6
rate a ratio of a to b where a and b represent quantities measured in different units. 125 miles/ 2hours 0r 62.5 mi/h
ratio a ratio is the comparison of two quantities by division 7:3 5/7
relative error the ratio of the absolute value of the difference of a measured value and an actual value compared to the actual value. |5-5.5|=|-0.5|+0.5=1 5.5 5.5 11
scale the ratio of any length in a scale drawing to the corresponding actual length. the lengths may be in different units. the scale on the road map is 1.5 inches=12 miles
scale drawing an enlarged or reduced drawing similar to an actual object or place. a blue print is a scale drawing of a house or building.
similar figures similar figures are two figures that have the same shape, but not necessarily the same size. similar figures could be a big triangle and a smaller triangle that look just alike.
scale model a three-dimensional model that is similar to a three-dimensional object. a ship in a bottle is a scale model.
Subtraction property of equality subtracting the same number from each side of an equation produces an equivalent equation. x+3=2 x+3-3=2-3
Unit analysis including units for each quantity in calculation to determine the unit of the answer. to change 10ft to yards, multiply by the conversion factor 1yd/3ft. 10ft(1yd/3ft)=3 1/3yd
Unit rate a rate with a denominator of 1. the unit rate for 120 miles driven in 2 hours is 60 mi/h.
Created by: lazyperson
Popular Math sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards