Answer:
If the price is p and the cost is c, then
15p = 20c
p/c = 20/15 = 1.333
so, he made 33% profit
Keep in mind: the area of a rectangle is equal to the product of its length and width. In this case the area is 288 square inches, and this equals the length (2x+10) times the width (3x). In other words, (2x+10)(3x)=288 square inches.
Multiply out (2x+10)(3x). This gives you a quadratic expression which is still equal to 288 square inches.
Next, move that "288 square inches) to the left side and rearrange all of your terms (there should be three terms) into the form ax^2 + bx + c = 0.
Your next task is to solve this quadratic equation for x. You could use the quadratic formula, factoring or graphing to find x.
Please share your work.
Answer:
Step-by-step explanation:
Exterior angle property: Exterior angles equals the sum of remote angles
19x - 18 = 7x + 1 + 10x - 9
19x - 18 = <u>7x + 10x</u> + <u>1 - 9 </u> {Combine like terms}
19x - 18 = 17x - 8 {Subtract 17x from both sides}
19x - 17x - 18 = -8
2x - 18 = -8 {Add 18 to both sides}
2x = -8 + 18
2x = 10
x = 10/2
x = 5
Answer:
We have the equation:
(14 N/mm)*X = Y N/cm
So we want to transform 1/mm to 1/cm.
We know that:
10mm = 1cm
1 = 10mm/1cm (we want to have mm on the numerator, so it cancelates with the mm in the denominator)
then the conversion is from 1/mm to 1/cm is:
X = 10mm/cm
then we have:
(14N/mm)*(10mm/cm) = 140 N/cm