Sonji plots –9 on a number line to represent the depth of her sailboat underwater and labels it b. she plots positive 20 on the same number line to represent the height of her sailboat above water and labels it a. sonji asks if b, the elevation below sea level, acts as an opposite to a, the elevation above sea level. what is the best answer to her question?

  No.

Step-by-step explanation:

The opposite of a number is that number with its sign changed. The opposite of A is -20, not -9.

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510

no, the equation would be invalid since they are both not equal.

step-by-step explanation:

here you got

4y-6+4y 2-9

first, you would simplify the equation on the form.

4y-6+4y 2-9

then, move all the terms that contains a y to the left and all the other terms to the right.

+4y-4y+-9-6

finally, you will simplify the left and the right side of the equation.

y=-3