Answer:
The type of lamp is a confounding variable.
Step-by-step explanation:
to test the average life of the bulbs the same lamps should be used
Answer:
x = -2
Step-by-step explanation:
2x + 4 = 0
2x= -4
x=-2
And inequality is written to compare two quantities.
The best way to show how these two quantities compare would be to put is zero to the right of the five in 0.25. Make it 0.250.
Please see the attached picture for two correct ways to write this inequality.
Answer:
8.5
Step-by-step explanation:
To calculate the distance between two points, we can use a formula that is a variation Pythagorean Theorem. Look:

"d" represents the distance and coordinates are expressed as follows: (x, y)
Let's go to the calculations.
The answer is 10 uc.