So you don't know the value of x, y, or z; all you're told is to solve for x. This is not impossible (even though it may seem like it). Your answer will have several variables in it, but in algebra you won't always have the complete answer.
Start with the equation: 4x - 5 / y = 2z
The first thing you'll want to do to it is try to get x alone on one side.
4x - 5 / y = 2z
+5 +5 --> 4x / y = 2z +5
*y *y --> 4x = y (2z + 5)
/4 /4 --> x = (y (2z + 5)) / 4
Your final answer will be: x = (y (2z +5)) / 4
Hope it makes sense to you!!
ANSWER
A. 8cm
EXPLANATION
The diagonal of the square is
Let the length of each side of the square be l units.
Then the diagonal and any two sides form an isosceles right triangle with the diagonal being the hypotenuse.
We use the Pythagoras Theorem, to obtain,
This implies that,
Solve for l,
Take positive square root of both sides
The equation you're looking for is...
<span>A = P( 1 + r)^n
where P = principle amount , r = rate and n = number of years</span>
Answer:
375 miles
Step-by-step explanation:
m=miles
I set it up as an equation. $75+.60m=.80m
And solved from there