Answer:
x > 31
Step-by-step explanation:
Given
- 5x + 5 > 160 - 10x ( add 10x to both sides )
5x + 5 > 160 ( subtract 5 from both sides )
5x > 155 ( divide both sides by 5 )
x > 31
Answer:
y = -x - 2
Step-by-step explanation:
Simplifying the equation of our line;
y - 1 = (x + 2)
y = x + 3
The slope of our line is 1
The slope of the perpendicular line(s) must be -1 (the product of slopes of two perpendicular lines = -1)
The line whose slope is -1 (from the choices) is the one whose equation is:
y = -x - 2
Answer:
The equation that describes the amount of mass left after a time t of a radioactive isotope is the following:
where
is the mass of the sample at t = 0
is the half-life of the sample
For the element X in this problem,
We want to find the time t at which
So we need to re-arrange the equation making t the subject:
Step-by-step explanation:
Its 80 because if you find perfect square around the number 80 you'd get
√64 and √81
which would be 8 and 9
