Answer:
<h2>Direction is represented by +9, indicating that is moving in a positive direction (upwards).</h2><h2>Zero is the reference point.</h2>
Step-by-step explanation:
So, basically, we need to apply a reference system to express directions, because all movements are represented respect to a reference point. In this case, number zero represents that reference point, which is located in the ground, setting this reference point we can measure the distance that Xavier traveled upwards the apple tree.
Step-by-step explanation:
x² + 6x + 9 = 2
(x + 3)² = 2
x + 3 = ±sqrt(2)
x = -3 ± sqrt(2)
so, B and D are correct.
control :
(-3 + sqrt(2))² + 6(-3 + sqrt(2)) + 9 = 2
9 + 2 - 6sqrt(2) - 18 + 6sqrt(2) + 9 = 2
2 = 2
correct
(-3 - sqrt(2))² + 6(-3 - sqrt(2)) + 9 = 2
9 + 2 + 6sqrt(2) - 18 - 6sqrt(2) + 9 = 2
2 = 2
correct
(3 + sqrt(2))² + 6(3 + sqrt(2)) + 9 = 2
9 + 2 + 6sqrt(2) + 18 + 6sqrt(2) + 9 = 2
38 + 12sqrt(2) = 2
wrong.
(3 - sqrt(2))² + 6(3 - sqrt(2)) + 9 = 2
9 + 2 - 6sqrt(2) + 18 - 6sqrt(2) + 9 = 2
38 - 12sqrt(2) = 2
wrong.
Answer:
The answer to this question is: B [-2√5]
Step-by-step explanation:
First, Find both numbers that can accommodate with each of the radicals.
√20
10 and 2
5 and 2 and 2
√80
10 and 8
5 and 2 and 4 and 2
5 and 2 and 2 and 2 and 2
After this is what they'll look like.
√5,2,2 - √5,2,2,2,2
Group numbers of pairs
√5,<u>2,2 </u>- √5,<u>2,2</u>,<u>2,2</u>
<u>For every pair, bring out the #'s, but only one survives, and comes out.</u>
2√5 - 4√5
= -2√5
This is your answer! Hope this helped!
Answer:
480
Step-by-step explanation:
So we have the expression:
And we want to evaluate it for z=5 and c=2:
So:
Multiply within the parentheses:
Subtract within the parentheses:
Multiply: