We have two types of textbooks. Let's use "x" to represent the number of math textbooks and "y" to represent the number of history textbooks.
Altogether, the bookseller sold 240 math and history textbooks. So:
x + y = 240
Now, the number of history textbooks sold was 72 less than the number of math books sold. So:
y = x - 72
Now we can substitute for y in the equation and solve:
x + y = 240
x + (x - 72) = 240
2x - 72 = 240
2x = 312
x = 156
The bookseller sold 156 math textbooks.
Since y = x - 72, he must have sold 84 history textbooks.
Let's check our answers:
x + y = 240
156 + 84 = 240
That is true, so we did get the correct answers.
1/4 = 4/16
six month improvement-> 7/16-4/16 =3/16
after another six months-> 7/16+3/16=10/16
Ans:10/16
Theres roughly 53 weeks in a year (rounded up) that times two would be 106 weeks, take that times 15 and you would have 1,590 dollars (again this was rounded up if your looking for exact it would be wrong)
it would of course be much closer to 1,564 if it wasn't rounded
Answer:
The quadratic function representing the total area of the park and the path is
Step-by-step explanation:
The width of the rectangle is x----------(1)
Then the length = twice it's width
Length =
Length = 2x------------------(2)
Now the width along with the foot path = x +3+3 = x+9
the length along with the foot path = 2x + 3+3 = 2x +9
The total area of the park and the path =
that is
=> (2x + 9)(x+9)
=>
=>