Step-by-step explanation:
The perimeter is the sum of all sides.
AB+AC+CB=75
(2x-9) + (2x+3) + (3x+4) = 75
Combine like terms:
(2x+2x+3x) + (-9+3+4) = 75
7x - 2 = 75
7x = 77
x=11
Replace 'x' with '11' in the above equations to find that:
AB = 2(11) - 9 = 22 - 9 = 13 m
AC = 2(11) + 3 = 22 + 3 = 25 m
CB = 3(11) + 4 = 33 + 4 = 37 m
13 + 25 + 37 = 75 m
A year is a leap year (and only if)
He repeats it about 3 times
We conclude that the expression is equal to 15.
<h3>
How to find the value of the expression?</h3>
Here we have the expression:
3 + 2*(8 - 5) + 6
We start by solving the parenthesis, 8 - 5 = 3, then we get:
3 + 2*3 + 6
Now we solve the product: 2*3 = 6, then we get:
3 + 6 + 6
Now we can directly solve that addition:
3 + 6 + 6 = 3 + 12 = 15
We conclude that the expression is equal to 15.
If you want to learn more about algebraic expressions:
brainly.com/question/4344214
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