Answer:
I don't have enough info to understand the question?
Step-by-step explanation:
The answer is 4a+ 2b + 14 -b. Remember, always do the number problem inside the "()" first.
Step-by-step explanation:
I don't see the options I can select, but it should be something like "sum".
it is also the "sum" of the areas of the rectangles separated by the dashed line (6×5 and 6×4). so, 6(9) = 6(5) + 6(4).
it is strangely written.
but 6(9) simply means 6×9 or 6×(9). one could also write (6)(9). and the same for 6(5) and 6(4).
To find the better buy we have to find the cost per pen for each.
1. 20 pens for $1.60 -> 1.60/20 = .08 cents per pen.
25 pens for $2.25 -> 2.25/25 = .09 cents per pen.
The best buy is 20 pens for $1.60 because it's cheaper per pen.
2. 13 berries for $2.60 -> 2.60/13 = .20 cents per berry
17 berries for $3.06 -> 3.06/17 = .18 cents per berry
The best buy is 17 berries for $3.06 because it's cheaper per berry.
Step-by-step explanation:
The first step in completing the square is to make the leading coefficient 1.
3 − 4x = 5x² − 14x
First, add 4x to both sides.
3 = 5x² − 10x
Divide both sides by 5.
3/5 = x² − 2x
The next step is to create the square. Take half of -2, square it, then add the result to both sides. (-2/2)² = 1.
3/5 + 1 = x² − 2x + 1
8/5 = x² − 2x + 1
Finally, factor the perfect square and solve for x.
8/5 = (x − 1)²
Take the square root of both sides.
±√(8/5) = x − 1
Add 1 to both sides.
x = 1 ± √(8/5)