A cell splits in half every 15 minutes. How many cells will there be in 150 minutes (2.5 hours)??
1 answer:
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Answer:
x =
Step-by-step explanation:
The absolute value always returns a positive value but the expression inside can be positive or negative, that is
x + 4 = 3x - 5 ( subtract 3x from both sides )
- 2x + 4 = - 5 (subtract 4 from both sides )
- 2x = - 9 ( divide both sides by - 2 )
x =
OR
-(x + 4) = 3x - 5
- x - 4 = 3x - 5 ( subtract 3x from both sides )
- 4x - 4 = - 5 ( add 4 to both sides )
- 4x = - 1 ( divide both sides by - 4 )
x =
As a check
Substitute these values into the equation and if both sides are equal then they are the solutions
| + 4 | = |
| =
right side = - 5 =
left side = right side , thus x = is a solution
check second solution
| + 4 | = |
| =
right side = - 5 = -
right side ≠ left sides, hence not a solution
Measuring the figure with a ruler, length = 2 inch and width = 1.5 inch
It is given that 1/2 inch = 4 feet
1 inch = 4*2 = 8 feet
Area of rectangle = length * width
Length = 2*8 = 16 feet
Width = 1.5*8 = 12 feet
Area of Quintoe's bedroom = 16 feet * 12 feet =
Hence option C is correct.