Answer:
2k
Step-by-step explanation:
-k+3k=3k-k=2k
Answer:
Step-by-step explanation:
2x + 3x + 8 - 3x - 2 = 2x + 6
The first and third expressions.
Answer:
The LCM of these numbers is 45
Step-by-step explanation:
To find the lcm, you must list the multiplies of all of the numbers and find the least common number.
Answer:
5 : the number is divisible by 5 because the divider ends with a 5
3: the number is divisible by 3 because the sum of all the digits of the divider are visible by 3.
Step-by-step explanation:
Since x² + kx + (k + 3) is tangent to the x-axis, the quadratic function has a repeated root.
The discriminant is zero, so b² - 4ac = 0.
=> k² - 4(1)(k + 3) = 0
=> k² - 4k - 12 = 0
=> (k - 6)(k + 2) = 0
Hence k = 6 or k = -2.