<span>5x^2 - 7x + 2
5x^2 - 2x - 5x + 2
x(5x - 2) - (5x - 2)
(5x - 2)(x - 1)
The answer is: (5x - 2)(x - 1).</span>
Let's start making our expression.
Just take the number 40 and change it around.

That's a good start.
49 is equal to 7×7, or 7². 9 is equal to 3×3, or 3².
So we can also write this as

You can really do whatever you want with it as long as it's still 40, just make sure you've got an exponent there. Here's another example.
Answer:
independent is miles, dependent is dollars
Step-by-step explanation:
y depends on x
x is always independent variable and y is dependent.
Answer:
1,771.6 inches.
Step-by-step explanation:
As there are 13 girls and 15 boys in the class, there are a total of 28 students (13 + 15). Thus, while the average height of these is 161 cm, the total height in centimeters of all the students is 4.508 centimeters (161 x 28).
Now, 1 centimeter is equal to 0.393 inches. Thus, since 4.508 x 0.393 equals 1,771.6, the height in inches of the entire class measured together is 1,771.6 inches.
All you do is add 23 and 65 to get your answer <span />