Hi,
WORK:

Multiply both sides of equation by 3.

Distribute one half thought parenthesis.

Multiply both sides of equation by 2.

Move r variable to left side and change its sign.

Collect the like terms.

Result:

Hope this helps.
r3t40
Answer:
<h3> 78%</h3>
Step-by-step explanation:
Given
Number of scientist that line in Antarctica during the winter = 1,100
Amount of scientist in the summer = 5,000
Increment = 5000 - 1100
Increment = 3900
percentage change = Increment/Original amount * 100
Percentage change = 3900/5000 * 100
Percentage change = 3900/50
Percentage change = 78%
<em>Hence the percent change in the number of scientists living in Antarctica is 78%</em>
It seems that you have missed the given options for this question, but anyway here is the correct answer. To solve the problem, Lynn Drew should use the operation of ADDITION to find the unknown number. Given that there are 90 flowers and 54 flowers, the unknown number would be 144. Hope this answers your question. Thanks for posting!
Answer:
-88
Step-by-step explanation:
another solution:
x-3=0→x=3
r = f(3) = 3³ - 14(3)² + 7×3 - 10 = 27 - 126 + 21 - 10 = -88