Step-by-step explanation:
There are 2 questions in one.
1)
<u>Roberta is 20 years older than Julian. In 4 years, Roberta's age will be twice Julian's age:</u>
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2)
<u>Roberta is twice as old as David. In 10 years, Roberta will be 8 less than three times David's present age:</u>
Correct choice is A
Answer:
c^2 +17c -5
Step-by-step explanation:
I like to line them up vertically
2c^2 +7c - 1
- (c^2 -10c+4)
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Distribute the minus sign
2c^2 +7c - 1
- c^2 +10c-4
----------------------
c^2 +17c -5
By substitution,



and so on, so that
[tex]g(n)=6.1^{n-1}g(1)=2.7\cdot6.1^{n-1}
Answer:
y=-3x+80
Step-by-step explanation:
Points (12,44) and (20,20)
slope = -3
Equation of line: y - 44 = -3(x - 12)
Answer:

Step-by-step explanation:
We need to find the equation of parabola using given information
- Vertex: (0,0)
- Open to the left
- Focal width = 12
If parabola open left and passes through origin then equation is

Focal width = 12
Focal width passes through focus and focus is mid point of focal width.
Focus of above parabola would be (-a,0)
Passing point on parabola (-a,6) and (-a,-6)
Now we put passing point into equation and solve for a


a can't be negative.
Therefore, a=3
Focus: (-3,0)
Equation of parabola:

Please see the attachment of parabola.
