Solving Equations
Solve for x:
-1/3x = 7
x = -21
Solve for W:
A = LW
W = A/L
A blouse is on sale for 33% off. The regular price is $46. What is the sale price?
$30.82
Solve for y:
-7/10 = y/9
y = -6.3
What is 72% of 150?
108
Solve for x:
14 = -4x + 6
x = -2
Solve for h:
A=1/2 bh
h=(2A)/b
abs(-4x)=16
x = 4 or -4
You project a drawing 7 in. wide and 4.5 in. tall onto a wall. The projected image is 27 in. tall. How wide is the projected image?
42 in
What percent of 48 is 18?
37.5%
Solve for y:
2(y - 4) + 16 = 8 + 2y
All real numbers
R
Solve for w:
7 - w = k - m
w = 7 - k + m
Solve by mental math and explain how you got your answer:
Estimate the tax on a $21,899 car when the tax rate is 5%.
About $1100
10% of $22,000 = $2200 (remove one zero)
So 5% is half of 10%
If Andy drinks 8 cups of water per day, what is his rate in ounces per hour?
2 2/3 oz/hr
600% of what number is 102?
17
Solve for n:
8n - (2n - 3) = 12
n = 3/2
Solve for x:
(x+r)/t + 1 = 0
x = -t - r
1-3abs(x-1)=7
No solution
Teenagers should consume 1300 mg calcium per day. Convert this rate to grams per year.
474.5 g/yr
A salesman earns a base salary of $36,000 plus 2 1/2% commission on sales. His total sales for one year was $500,000. Find the salesman's total pay for that year.
$48,500
Solve for g:
5g - 4(3g - 5) = 1 - g
g = 19/6
Solve for x:
y - 3x = 2x + 9
x = (y-9)/5
6 - abs(2x-5)=4
x = 3/2 or 7/2
Solve for c:
5/(2c - 3) = (-3)/(7c + 4)
c = -11/41
Amy purchased a picture frame for $14.57. This price was a 36% markup from the wholesale cost. What was the wholesale cost? Round your answer to the nearest cent.
$10.71