Test Ch. 0

Question 1

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Question 6

Answer 6

Question 7

Answer 7

Question 8

Area of triangle

Answer 8

Question 9

Area of rectangle or square

Answer 9

length * width

Question 10

perimeter of square, rectangle, triangle

Answer 10

add all sides

Question 11

Find the perimeter and area of a figure when given points A (x,y) B (x,y)

Answer 11

1) Draw points and figure out what shape it is

2) Find the distance between A-B and B-C, A-C, etc.

3) Use formula for area

4) add all sides to find perimeter

Question 12

Find distance of a straight line

Answer 12

subtract, answer always positive

horizontal line: subtract x2-x1
Vertical line : y2-y1

Question 13

Find distance of a diagonal

Answer 13

Distance formula

Question 14

Distance formula

Answer 14

Question 15

Find the center of a circle (h, k) using endpoints

Answer 15

Find the midpoint

Question 16

Equation of a circle in standard form

Answer 16

Question 17

When adding or subtracting fractions

Answer 17

Find the common denominator on all sides. Figure out one side first, then the other

side 1 = side 2

Question 18

Find a general form of an equation passing through (a,b) and (b,c)

Answer 18

1) find the slope

2) write in point-slope or slope-intercept form

3) Solve

4) arrange in form ax + by+ c = 0

Question 19

Slope formula

Answer 19

Rise/run

Question 20

point-slope form

Answer 20

Question 21

Slope-intercept form

Answer 21

y= mx + b

Question 22

Parallel lines

Answer 22

same slope

Question 23

Perpendicular lines

Answer 23

opposite inverse slope

Question 24

Complete the square steps

Answer 24

1) Start with a quadratic equation
2) Move C to the right side
3) Add (b/2)^2 to both sides
4) Factor the left side (left = right)
hint: It will always be (x+/- (b/2)^2
5) Solve the right side
6) Take the square root of both sides
7) Solve for x

Question 25

Square root of a negative

Answer 25

Question 26

Quadratic formula

Answer 26

Question 27

Solve an inequality with ax+c in the middle

Answer 27

Add/subtract c from the right and left side to leave x in the middle alone

solve

Question 28

Solve absolute value inequalities

Answer 28

2 equations: one for + and one for -

Test to see which answer is true

Question 29

Add complex numbers
(a+bi) + (c+di)

Answer 29

Question 30

Subtract complex numbers
(a+bi) - (c+di)

Answer 30

Question 31

Multiply complex numbers

Answer 31

Question 32

Divide complex numbers

Answer 32

Question 33

Solve system of equations algebraically

Answer 33

1) Elimination method between equations 1 and 2

   -- Get new equation 2
   -- equation 1 stays the same #2) Elimination method between equations 1 and 3
        ---Get  new equation 3
        -- equation 1 stays the same #3) Elimination method between your new equation 2 and new equation 3

Question 34

When solving inequalities

Answer 34

Write the interval notation

(3, 4)

(3,4) u ( 7, 10)

Question 35

Sign test for inequality equations

Answer 35

plot the solutions on the x line

If you are looking for a solution <0 , then choose the intervals when the solution is negative

If greater than 0, choose the interval where it’s positive

Question 35

Sign test for inequality equations
when joined

Answer 35

Plot your solutions in line

• if your answer needs to be less than 0, it is negative, so you need to choose only the intervals where the function is negative