Answer:
y = 3, y = 5, y = -1
Step-by-step explanation:
What you do is you substitute the x values into the x.
<em>y + 2(-1) = 5</em>
<em>y + -2 = 5</em>
y = 3
<em>y + 2(0) = 5</em>
y = 5
<em>y + 2(4) = 5</em>
<em>y + 6 = 5</em>
y = -1.
it is B
im not sure what else to say but my answer has to be 20 words or something
Answer:
$ 2.167
<h3>
Step-by-step explanation:</h3>
Let the cost of a pencil be x and that of a pen be y.
A pen costs <u>twice</u> as much as a pencil.
==> cost of a pen = 2 × cost of a pencil
==> <u>y = 2x</u>
Their total cost is $6.50
==> x + y = $6.50
<em>since</em><em> </em><em>y</em><em> </em><em>=</em><em> </em><em>2</em><em>x</em><em>,</em><em> </em><em>substituting</em><em> </em><em>y</em><em> </em><em>for</em><em> </em><em>2</em><em>x</em>
==> x + 2x = 6.50
==> 3x = 6.50
<em>dividing</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>by</em><em> </em><em>3</em>
==> x = 2.16
As per our assumption, x is the cost of one pencil.
Therefore, the cost of a pencil is <u>$2.16</u><u>7</u>