Question

GRE Review: Coordinate Geometry

Answer 1

\({\bf{Basics:}}\)


> if a point is on the x-axis the y-coordinate is 0
> if a point is on the y-axis the x-coordinate is 0

sometimes you will be given a point like this:



we don't know what the x-value is (we do know that it's positive) but we know that it's on the x-axis so we can assign a variable to be x

(a,0) where a is positive

Answer 2

\({\bf{Calculating~Distance~Btwn~Points:}}\)

> if the two points are on the same horizontal line, subtract the x-coordinates
> if the two points are on the same vertical line, subtract the y-coordinates
this will work even if you aren't given numbers, but rather variables

if neither of these conditions apply you can use the distance formula, or, if you forget, construct a right triangle where the distance between the two points is the hypotenuse, then use the pythagorean theorem to calculate the hypotenuse length

Answer 3

\({\bf{Slopes:}}\)
> horizontal line has 0 slope; vertical line has undefined slope
> upward slanting lines have + slope, downward slanting lines have - slope



> parallel lines have the same slope
> perpendicular lines have opposite-reciprocal slope
ex: if slope of a line is 1/2, then the slope of a perpendicular line has slope -2

flip the numerator and denominator, then multiply by -1

> slope formula:



always double check the sign of the slope after you have calculated it

Answer 4

Anyway, that's the end of my tutorial, I hope it was a helpful resource. Source material is the 19th edition Barron's prep book for the new GRE.

Answer 5

Luella has a pond in her yard. She wants to surround it with 330 feet of fencing. The fencing is sold by the yard. How many yards should she buy?

Answer 6

someone check my answers
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Answer 7

https://i.imgur.com/Wjmpc6D.png

Answer 8

Assessment items
Assessment started: undefined.
Item 1

Read the passage.

Dark Star

Giselle leaned against the mahogany bay horse, stroking the white diam

Answer 9

Okay I was gone for a minute BUT I'M BACK NOW

Answer 10

the scatter plot presents Ray's monthly electricity bills and amount of time ray

Answer 11

Which word shares a connotative meaning with the word cheap as it is used in this sentence?

Ashley thought her parents were being cheap when they bought ge

Answer 12

Which revision fixes the dangling modifier in the sentence?

Rowing through the rapids, the canoe began to fill with water.

Answer 13

dangling modifier

Answer 14

Misplaced Modifiers

Answer 15

For which literary work did Joseph Heller use his military experiences as a prima

Answer 16

Calc III Tutorial: Lagrange Multipliers

Answer 17

Can someone translate this for me?

Answer 18

Find the interest due on $1,090 at 8% for 5 years.

43.60
68.13
436.00
681.25

Answer 19

Now identify the simple subject and simple predicate.

The meeting began promptly at seven o'clock.

Answer 20

What can be inferred from these lines describing the pardoner in Chaucer's prolog

Answer 21

What is the rate of change of the linear relationship modeled in the table?

x y

Answer 22

Which of these best identifies the shift of mood in this sentence?

"If you were to sit more comfortably, you will not fall off.

Answer 23

Which scenario best matches the linear relationship expressed in the equation y = u221214x + 1,700?

Kent has $1,700 in his bank account and spends $14 each

Answer 24

The saying "Whoso is a man must be a nonconformist" is based on whose transcendentalist belief?
A.