Equations A
19 = a - 4
a = 23?
2 + x = -8
x = -10?
x/4 = -5
x = -20?
Solve S = 2πrh for h. (π is the symbol for pi. It's the best I could do.)
h = S/(2pir)
Find the unit rate. (7 frozen yogurt bars for $1.59)
$0.23/bar
-15 = 10/11 x
x = -33/2
17 = 5 - 3p
p = -4
-3/4 x - 2 = -8
x = 8
3x + 4y = -15 + 6y (Solve for y.)
y = 3/2x + 15/2
Find the average speed. (Ran 3.25 mi in 1/2 hour)
6.5 mi/h
5x - 16 = 3x
x = 8
12 - 4h = -18 + 11h
h = 2
3/5x = 9 - 2/5x
x = 9
C = 2pir
(Solve for r.)
r = C/(2pi)
Write
3/15
as a percent.
20%
18 - 3y = 5 (Round to the hundredths.)
y = 4.33
4.5 - 7.2x = 3.4x - 49.5 (Round to the hundredths.)
x = 5.09
15 = 2/3 x
x =
45/2
3x + 2y - 4 = 2(5 - y) Solve for y
y = -3/4x + 7/2
A customer left a 14% tip which was $1.75. How much was the bill?
$12.50
9(-5 - r) = -10 - 2r
r = -5
-5r - 6 + 4r = -r + 2
no solution
24a - 8 - 10a = -2(4 - 7a)
all real numbers
Solve for r:
S = πs(R + r)
r = S/(πs) - R
You stuffed 108 envelopes in 45 minutes. At this rate, how many envelopes can you stuff in 2 hours?
288