Writing an Equation
The sum of a number x and 4 equals 12
x + 4 = 12
x + 42 = 85
x=43
5b = 65
b = 13
y = 2x (3,6)
6=2(3) or 6=6
The independent variable in distance = rate x time (d=rt) is:
rate
A number w divided by 5 equals 6
w/5 = 6
s - 68 = 11
s = 79
4x = 32
x = 8
Tell whether the ordered pair is a solution:
y = 4x - 3 (4,12)
NO
p = 8.65h gives the amount in dollars of pay (p) a sales person receives for working hours (h).
The dependent variable is:
p the amount of pay
Nine times a number b is 36
9b = 36
w + 23 = 41
w = 18
w/4=12
w = 48
Tell whether the ordered pair is a solution:
y= 7x (2,21)
NO
h = 60 - 4m gives the height (h) of water in a fish tank minutes (m) after you drain it.
The independent variable is:
(m) minutes you drain the tank
11 is the quotient of a number y and 6
11 = y/6
2/3 + x = 9/10
x = 7/30
2/7 X = 6
x = 21
Tell whether the ordered pair is a solution:
y=5x + 1 (3,16)
YES
A car moves 660 feet every 10 seconds. As the time increases, the distance increases or decrease? (r=dt)
increases
Five is one-fourth of a number c
5 = 1/4 C
1.2 = m - 2.5
m = 3.7
2y/5 = 14
y = 35
Tell whether the ordered pair is a solution:
y = x/12 + 5 (60, 10)
YES
The elevator rises 5 stories every 6 seconds. As the time increases, the distance increases or decreases?
(r=dt)
increases