Answer:
- 2x + 18
Step-by-step explanation:
Given
4x - 2(3x - 9) ← distribute
= 4x - 6x + 18 ← collect like terms
= - 2x + 18 OR 18 - 2x
The percent of error can be found by dividing the difference in weights by the predicted weight.
290 - 258 = 32 pounds
32/258 = 0.124
0.124 = 12.4% approximately was the percent of error
Answer:
30
Step-by-step explanation:
The sum of all the angles in a triangle is always, always, 180 degrees.
Just add the angles, then solve for x.
(2x - 10) + (x + 30) + 70 = 180
3x + 20 + 70 = 180
3x + 90 = 180
3x = 90
x = 30
