9514 1404 393
Answer:
$3.36
Step-by-step explanation:
On each pencil, the profit was ...
pencil profit = pencil price - pencil cost
pencil profit = $0.22 -0.15 = $0.07
The number of pencils sold was ...
(4 dz)(12 pencils/dz) = 48 pencils
Then the total profit was ...
(48 pencils)($0.07 /pencil) = $3.36
The store made a profit of $3.36 from pencils.
Katrina has 8 ribbons in all, because 2 x 4 is 8 and that is the whole amount.
Simplifying
9 + 7x = 7x2
Solving
9 + 7x = 7x2
Solving for variable 'x'.
Combine like terms: 7x2 + -7x2 = 0
9 + 7x + -7x2 = 0
Begin completing the square. Divide all terms by
-7 the coefficient of the squared term:
Divide each side by '-7'.
-1.285714286 + -1x + x2 = 0
Move the constant term to the right:
Add '1.285714286' to each side of the equation.
-1.285714286 + -1x + 1.285714286 + x2 = 0 + 1.285714286
Reorder the terms:
-1.285714286 + 1.285714286 + -1x + x2 = 0 + 1.285714286
Combine like terms: -1.285714286 + 1.285714286 = 0.000000000
0.000000000 + -1x + x2 = 0 + 1.285714286
-1x + x2 = 0 + 1.285714286
Combine like terms: 0 + 1.285714286 = 1.285714286
-1x + x2 = 1.285714286
The x term is -1x. Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.
Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 1.
Simple interest is $ 9
<em><u>Solution:</u></em>
Given that,
P = $ 400
T = 0.25 years
<em><u>The formula for simple interest is:</u></em>
Where,
I is the simple interest earned
R is the rate of interest in decimal
T is the number of years
<em><u>Substituting the values we get,</u></em>
Thus simple interest is $ 9
Answer:
5x^2−10x−2
Step-by-step explanation:
I hope this is what you are looking for I just added (5x^2 – 9) + (-10x + 7)
