3y+21+8y
11y+21 is the answer
Answer:
x= - 2
Step-by-step explanation:
hello :
note : the equation of the axis symmetry for the parabola : y =ax²+bx+c
when : a≠ 0 is : x=- b/2a
in this exercice : a=1 and b=10
so : x= -10/2 = -5
Answer:

Step-by-step explanation:
Given: 
Let's changed that mixed number to an improper fraction. Now we get:

Let's find out least common denominator. This one is easy, the LCD is 8. Now that we know the LCD, let's convert both our fractions:

We can use
because it is equal to
. Now, all we need to do is subtract the numerators:
