<u>ANSWER: </u>
If x = and x = -3 are the roots of the equation, then values of a and b are 3, -6
<u>SOLUTION:
</u>
Given, quadratic equation is and its roots are -3 ,
We know that, for any quadratic equation of form with roots then,
Sum of roots =
Product of roots ( =
Now, for given quadratic equation = -3 and =
hence Sum of roots =
on solving we get "a" = 3
Now product of roots =
b = -6
hence, the values of a and b are 3, -6.
Answer:
3.12 kg.
Step-by-step explanation:
Mass after t years:
The mass of the elements after t years is given by the following equation:
In which M(0) is the initial mass and r is the decay rate, as a decimal.
The half life of Cs-137 is 30.2 years.
This means that:
We use this to find r.
So
If the initial mass of the sample is 100kg, how much will remain after 151 years?
This is M(151), with M(0) = 100. So
The answer is 3.12 kg.
Answer:
(2,2) x should be 2 and y should be 2 too
Answer:
y = 4/5x - 9/5
Step-by-step explanation:
4x - 5y = 9 to solve for y you get it by itself.
-4x -4x minus 4x from both sides
-5y = - 4x + 9
/-5 /-5 Divide both sides by 5
y = 4/5x - 9/5 because -4/-5 is 4/5 and 9/-5 is - 9/5
Answer:
It's A .
Step-by-step explanation:
The order in which they are chosen is immaterial so it is a combination.
Number of combinations of 2 from 6 = 6C2
= 6*5 / 2*1 = 15.