I NEED MORE HELP CAN"T FIGURE OUT
1 answer:
You might be interested in
If there is no number in between sets of numbers, it's going to be multiplication.
So (w+2) x (w+7)
w+2, well, evaluates into w+2.
w+7 is w+7.
We'll use the FOIL method for this.
FOIL stands for:
First
Outer
Inner
Last
Let's start with the first terms. Multiply them.
So: w * w.
Combine both w's, and you get
.
Now multiply the outer terms.
w * 7 = 7w.
Then the inner terms. 2 and w.
2 x w = 2w.
So our current numbers are:, 7w, and 2w.
We can add 7w and 2w together.
7w + 2w = 9w.
Now multiply the last terms.
2 x 7 = 14.
So, this simplifies to
Hope this helped!
So (w+2) x (w+7)
w+2, well, evaluates into w+2.
w+7 is w+7.
We'll use the FOIL method for this.
FOIL stands for:
First
Outer
Inner
Last
Let's start with the first terms. Multiply them.
So: w * w.
Combine both w's, and you get
Now multiply the outer terms.
w * 7 = 7w.
Then the inner terms. 2 and w.
2 x w = 2w.
So our current numbers are:
We can add 7w and 2w together.
7w + 2w = 9w.
Now multiply the last terms.
2 x 7 = 14.
So, this simplifies to
Hope this helped!
Answer: The first diagram you selected is the correct visual representation.
Check out the diagram I posted below. The red vertical line is x = 0, aka the y axis. The blue parabola is 3x = y^2. The green horizontal line is y = 6. The region bounded by these curves is the gray shaded region.
Spinning that gray region around the y axis results in the first diagram in your answer choices. The disk in pink is a cross section to help find the volume (through the use of integral calculus).
