Answer:
110.30
Step-by-step explanation:
125.99-(125.99X0.15)= 107.09
107.09+(107.09X0.03)= 110.30
Answer:2.8%
Step-by-step explanation:
Answer:
3.75
Step-by-step explanation:
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Answer:
<u>The value of Y is - 9.</u>
Step-by-step explanation:
1. Let's start with the first equation to find out the value of Y.
7x + 2y = 3
2y = 3 - 7x
<u>y = 3/2 - 3 1/2x</u>
<u>2. </u>Now let's work with the second equation to find out the value of Y.
x - 3y = 30
x - 3 (3/2 - 3 1/2x) = 30
x - 9/2 + 21/2 x = 30
x + 21/2 x = 30 + 9/2
2x + 21x = 60 + 9
23x = 69
<u>x = 69/23</u>
<u>x = 3</u>
<u>3.</u> Now let's substitute the value of X in the first equation, to find out the value of Y.
7 (3) + 2y = 3
21 + 2y = 3
2y = 3 - 21
<u>2y = -18</u>
<u>y = - 9</u>
<u>4. </u>Proof of the values of X and Y on the second equation
x - 3y = 30 (x = 3 and y = -9)
3 - 3 (-9) = 30
3 + 27 = 30
<u>30 = 30 This means that the values of x and y are correct.</u>
Answer:
−10x − y = −20
y = -10x + 20
<em>hope this helps, good luck :)</em>