Tri 1 PRE-ALGEBRA

EQUATIONS

100

Solve

4n - 9 = 20

n = 29/4

200

7n - 4 = 3n - 11

n = -7/4

300

4n - 5 = 2(2n + 3) 

No Solution

400

x/4 - 5 = 2/3 x + 9

n= -168/5

500

Solve for x:

mx - by = c 

x = (c + by) / m

y = mx+b

100

Write the equation for 

m = 2   through. ( 0, 3)

y = 2x +3

200

m = 2/3 through ( -1,2)

y = 2/3 x+ 8/3

300

Through ( 4,2) with a slope of zero

y = 2

400

Through (2, 6) with an undefined slope

x =2

500

Through (2,4) and ( -2, 5)

y = -x/4 + 18/4

PROPORTIONALITY

100

Solve:   x/ 6 = 5/ 7

x = 30/7

200

Lines that are proportional must go through?

(0,0)

300

What is the constant of proportionality for

(4,20) ( 6, 30 ) ( 7, 35)

5

400

What is the constant of proportionality for 

(8,7) (16, 14) (24,21)

7/8

500

If two triangle are similar there sides are _______

Proportional

SLOPE

100

Find the slope

y = 1/3 - 6x

-6

200

Find the slope 3x + 7y = 9 

-3/7

300

A vertical line has what kind of slope 

Undefined

400

Find the slope (-2,7) (1, 8)

1/3

500

Slope is defined as 

The change in y over the change in x

NUMBER SENSE

100

Estimate the square root of  78

8-9

200

.818181 repeating is what fraction

81/99

300

What is 98700 in scientific notation 

9.87 x 10⁴

400

9.324 x 10^-7 is what as a standard numeral

.0009324

500

9^-2 written with a positive exponent is

1/9²