Answer:
![\boxed{ \bold{ \huge{\boxed{ \sf{ \: 12.9 \: \: dollars}}}}}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%20%5Cbold%7B%20%5Chuge%7B%5Cboxed%7B%20%5Csf%7B%20%5C%3A%2012.9%20%5C%3A%20%5C%3A%20%20dollars%7D%7D%7D%7D%7D)
Step-by-step explanation:
Given,
Cost without tax = $ 12
Tax percent = 7.5 %
Cost including tax = ?
<u>First</u><u>,</u><u> </u><u>finding </u><u>the</u><u> </u><u>tax</u><u> </u><u>amount</u><u> </u><u>:</u>
![\sf{tax \: amount \: = \: 7.5 \: \% \: of \: 12}](https://tex.z-dn.net/?f=%20%5Csf%7Btax%20%5C%3A%20amount%20%5C%3A%20%20%3D%20%20%5C%3A%207.5%20%5C%3A%20%5C%25%20%5C%3A%20of%20%5C%3A%2012%7D)
⇒![\sf{tax \: amount = \frac{7.5}{100} \times 12}](https://tex.z-dn.net/?f=%20%5Csf%7Btax%20%5C%3A%20amount%20%3D%20%20%5Cfrac%7B7.5%7D%7B100%7D%20%5Ctimes%2012%7D%20)
⇒
dollars
<u>Finding </u><u>the</u><u> </u><u>total</u><u> </u><u>cost</u><u> </u><u>of</u><u> </u><u>the</u><u> </u><u>lunch</u><u> </u><u>including </u><u>tax</u><u> </u><u>:</u>
⇒![\sf{total \: cost \: = \: 12 + 0.9}](https://tex.z-dn.net/?f=%20%5Csf%7Btotal%20%5C%3A%20cost%20%5C%3A%20%20%3D%20%20%5C%3A%2012%20%2B%200.9%7D)
⇒
dollars
Hope I helped!
Best regards ! :D
Answer:
(-1,4)
Step-by-step explanation:
basically take x and subtract it from the other x and in the same order subtract the y's
Multiply both sides by 12 to cancel out the denominator on the x side. This way we can isolate x. x=36/5
Its d as then you have more accurate measurings than the others