horsegirl27
  • horsegirl27
Medal and fan, please help out! Question will be posted below vvv
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
horsegirl27
  • horsegirl27
You are ordering a meal and have $15 to spend. The restaurant charges 6% sales tax. You plan to leave a 15% tip. The equation c=x+0.06x+0.15x gives the total cost c of your meal, where x is the cost before tax and tip. What is the maximum amount you can spend before tax and tip? So, I'll be able to do the math, I'm just not a 100% sure of how to start.
anonymous
  • anonymous
You just have to find x.
anonymous
  • anonymous
It says in the problem that x is the cost before tax and tip, so the set c to 15 and solve for x.

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horsegirl27
  • horsegirl27
Well I understand that, and I understand how to find it, but I'm just slightly confused by my first step. it'll be clear once I understand it. Mind explaining and getting me on the right track?
anonymous
  • anonymous
Oh, in the calculation?
horsegirl27
  • horsegirl27
Yes
anonymous
  • anonymous
I would add up all the xs. x + 0.06x + 0.15x = 1.21x so 15 = 1.21x
horsegirl27
  • horsegirl27
Oh ok, thank you!! I can take it from here! Hold on and I'll show you what I get.
horsegirl27
  • horsegirl27
I got 12.4 (rounded up)
anonymous
  • anonymous
Actually, 12.39 because it should go to cents, and you're looking for the maximum so you shouldn't round up on the cent
horsegirl27
  • horsegirl27
oh, ok, thank you!! Could you explain another?
anonymous
  • anonymous
Yeah!
horsegirl27
  • horsegirl27
Thanks! One moment, let me type it :)
horsegirl27
  • horsegirl27
You have $85 in your bank account. Each week you plan to deposit $8 from your allowance and $15 from your paycheck. The equation b=85+(15+8)w gives the amount b in your bank account after w weeks. How many weeks from now will you have $175 in your bank account? Again, I can do the math, I just need help getting started.
anonymous
  • anonymous
175 = 85 + (15 + 8)w If I were you, I would gather like terms. This is one way to do it: 175 - 85 = 23w 90 = 23w
horsegirl27
  • horsegirl27
Ok, thanks! Let me finish that one, and i'll check with you.
horsegirl27
  • horsegirl27
3.91=w, correct?
anonymous
  • anonymous
yes. I got that too :) If you don't know how to start, you should add the xs together and the numbers together.
horsegirl27
  • horsegirl27
Ok, thanks. So always combine like terms, got it.
horsegirl27
  • horsegirl27
One more? This one is different. It's fractions, and I always get myself mixed up with those.
anonymous
  • anonymous
Yeah, I used to hate fractions XD
horsegirl27
  • horsegirl27
Haha they are quite a pain. 2/3(c-18)=7 (the 2 is over the 3, the parentheses are next to that)
horsegirl27
  • horsegirl27
@Luigi0210 please help me
Luigi0210
  • Luigi0210
\(\Large \frac{2}{3} (c-18) =7 \) \(\Large \frac{2}{3}c - \frac{2}{3}(18) =7 \) \(\Large \frac{2}{3}c - \frac{2}{1}(6) =7 \) \(\Large \frac{2}{3}c - (12) =7 \) \(\Large \frac{2}{3}c =19 \) \(\Large c= 19* \frac{3}{2} \)

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