Andy maximal age= 13.3
Matt maximal age= 21.7
I will translate the problem into 2 equation where X is Andy's age and Y is Matt's age.
Y+5= 2X
Y= 2X-5
X+Y<35
From this equation, it is clear that you won't be able to find their age. But you can find maximal age of Andy and Matt by changing X+Y<35 into X+Y=35
Inserting the first equation to the second equation you will get:
X+Y=35
X+ (2X-5)=35
3X= 35+5=40
X=13.3
X+Y=35
13.3+Y=35
Y= 21.7
Answer:
20
Step-by-step explanation:
To find this, we need to figure out what 1/5 is as a decimal
5/5 = 1, so 5 groups of 1/5 equals 1
Multiply this by 4, 20 groups of 1/5, or 20/5 = 4
Now we confirm this
1/5=0.2
4/0.2=20
So it is true
Hope this helps!^^
Answer:
9
Step-by-step explanation:
if that v is root symbol
Answer:
(- 1, 1 )
Step-by-step explanation:
Given the 2 equations
- 4x + 5y = 1 → (1)
4x + 4y = 8 → (2)
Adding (1) and (2) term by term will eliminate the term in x
9y = 9 ( divide both sides by 9 )
y = 1
Substitute y = 1 into either (1) or (2) for corresponding value of x
Substituting in (1)
4x + 5(1) = 1, that is
4x + 5 = 1 ( subtract 5 from both sides )
4x = - 4 ( divide both sides by 4 )
x = - 1
Solution is (- 1, 1 )