Decimals, Percents, Fractions

Question 1

1/10

Answer 1

.1…10%

Question 2

2/10…1/5

Answer 2

.2 20%

Question 3

3/10

Answer 3

.3 30%

Question 4

4/10

Answer 4

.4 40%

Question 5

5/10..1/2

Answer 5

.5 50%

Question 6

1/8

Answer 6

.125 12.5%

Question 7

11/10

Answer 7

1.1…110%

Question 8

12/10…6/5

Answer 8

1.2….120%

Question 9

3/8

Answer 9

.375…37.5%

Question 10

5/8

Answer 10

.625 62.5%

Question 11

7/8

Answer 11

.875, 87.5%

Question 12

10/8..5/4

Answer 12

1.25…125%

Question 13

3/2

Answer 13

1.5 10%

Question 14

62 divided by 10 to -2 power

Answer 14

6200

Question 15

4,000000 x .0003

Answer 15

move decimal place four times to the right for to get 3 and move decimal place four places to the left to get 400
=400 x 3

Question 16

300/.05

Answer 16

move decimals in the same direction on the top and bottom 30000/5 = 6,000

Question 17

percent increase

Answer 17

To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. If your answer is a negative number then this is a percentage decrease.

Question 18

New percent ( as % of original value)

Answer 18

new value/original value= 230/200

Question 19

$230 is what percent more than $200

Answer 19

this is just like asking what the percent increase is = 40%

change in value/orginal value

Question 20

30 is what percent more than 20

Answer 20

asking you to find the increase from 20 to 30

Question 21

slope-intercept equation: y=mx + b

Answer 21

m= slope b=y

Question 22

The distance between two points in the coordinate plane can be calculated by using the pythagorean theorem.

Answer 22

Fore example: points (1, 3) (7,-5)
side of traingle= 8 and 6
8 squared + 6 squared = c suqared

Question 23

Draw the line represented by x-y=18

Answer 23

first rewrite the line in slope intercept form (y=x-18)
2nd fine the intercepts by setting x equal to 0 and y equal to 0.
- y=0-18 x=18
- (0,18) (18,0)

Question 24

of all the quadrilaterals with a given area, the square has the minimum perimeter

Answer 24

Of all quadrilaterals with a given perimeter the square has the largest area

Question 25

diagnoa of a square = s square root 2

Answer 25

this is also the face diagnoal of a cube.

Question 26

diagnoal of a cube can be found using this formula

Answer 26

d=s cubbed

Question 27

if the rectangle above has a width of 6, and the ratio of thw width to the length is 3:4 what is the diagnol

Answer 27

3/4=6/x

Question 28

deluxe pythagorean theorem

Answer 28

ddsquared=x squared + y squared + z squared

x, y and z are the sides of the rectangular solid and d is the main diagnol

Question 29

one revolution ( spinning of wheel) = one full circumfrance

Answer 29

if the wheel has a diameter of 4 ft and travels 3 circumfrance per second then the point travels at a rate of 3 x 4 pie=12pie feet per second.

Question 30

Circumfrence and arc length. what is the arc length of axb

Answer 30

first find the cirumfrance then find the fraction of the arc is of the circle

Question 31

the boundaries of a sector of a circle are formed by the arc and two radius

Answer 31

add them to find perimeter of circle

Question 32

two circles and a rectangle form a cylinder

Answer 32

area of a cylinder = 2(rsquared_ + 2r x h

Question 33

two circles and a rectangle form a cylinder

Answer 33

area of a cylinder = 2(rsquared_ + 2r x h

Question 34

find the equation of the line containing the points (5,-2) (3,4)

Answer 34

y=-3x+b
solve for by ( they y intercepty, by plugging the coordinates of one point into the equation
–4=-3(3)+b = b=13

Question 35

If the coordinates of point A are (2,2) and the coordinates of point B are (0,-2) what is the equation of the perpendicular bisector of line segment AB

Answer 35

first find slope of AB = 2
next find the slope of perpendicular bisector of AB= -1/2
now you know the equation of the perpendicular bi sector has the following form
y= -1/2x + b
to find b find the point where the lines bisect then plug the coordinates of this point into the equation above

Question 36

Parrlelel lines have equal slopes

Answer 36

Perpendicular lines have negative reciporical slopes