5x + 2y = 7....multiply by -1
-2x + 2y = -14
----------------
-5x - 2y = -7 (result of multiplying by -1)
-2x + 2y = -14
---------------add
-7x = - 21
x = -21/-7
x = 3
5x + 2y = 7
5(3) + 2y = 7
15 + 2y = 7
2y = 7 - 15
2y = - 8
y = -8/2
y = -4
solution is (3,-4)
Dividing by a fraction is the same as multiplying the reciprocal of the fraction. What is the reciprocal of a fraction? It's essentially the same fraction, just the numerator and denominator switching places (flipping the fraction upside down). Knowing this, the following is true:
We also need to know that whenever the denominator of a fraction is 1, the fraction is equal to the numerator itself. Knowing this, the following is also true:
Applying this to the first concept, we can say that:
I hope this helps!
<h2>x = 6°</h2>
Step-by-step explanation:
<h3>^bac = ^dac</h3><h3>3x + 12° = 5x</h3><h3>12° = 5x - 3x</h3><h3>12° = 2x</h3><h3>6° = x</h3>
<h2>MARK ME AS BRAINLIST </h2><h2>PLZ FOLLOW ME</h2>
This is asking you how far around that specific portion of the circle did the needle travel. I'm guessing you're in geometry and you're doing circle stuff right now. This is the arc length. The formula is
which is a combination of the circumference of a circle and its central angle. Our situation will look like this:
If you leave your answer in terms of pi it would be
or if you multiply it in, then your answer will be 34.9