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zmey [24]
3 years ago
10

You and three friends go out for dinner. The bill comes to $77. If you pay $20 and your three friends all ordered the exact same

thing, what amount will each of your friends have to pay? I used f as the variable to express how much the friends have to pay. All I need is the 2 step equation I would write to help solve it. Please help. :)
Mathematics
2 answers:
Serhud [2]3 years ago
4 0
F=(77-20) / 3
 Subtract what is in parenthesis first and then dived by 3 :)
Anika [276]3 years ago
3 0
F = (77-20)/3
f=57/3
f=19
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This isn't really mathematics but I can give you an answer.

Assuming, it's in the dark (cuz in the light, why would you use flash), a person in the photograph can gain a red-eye (in the photo).

The only one I can think of is red eye.

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A tin of baked beans has a base area of 120 cm². Calculate the volume of the cylinder with a height of 10cm.
Vitek1552 [10]

Answer:

1,000cm^{3\\}

Step-by-step explanation:

1. Volume= length x width x height

2.  10 x 10= 100

3. 100 x 10= 1000

So the volume of the cylinder is 1,000 cm^{3\\}

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3 years ago
When you graph a system of equations what are the three possible outcomes?
siniylev [52]

Answer:

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Step-by-step explanation:

5 0
3 years ago
Solve the simultaneous Equation using the two <br> methods<br>4m=n +7<br>3m+ 4n+9=0​
GrogVix [38]

Elimination method:

4m = n + 7

3m + 4n + 9 = 0

<em>First, let's get the equations in the same form.</em>

4m - n - 7 = 0

3m + 4n + 9 = 0

<em>Now let's make multiply the first equation by 4 so we can eliminate n.</em>

16m - 4n - 28 = 0

+3m + 4n + 9 = 0

<em>Now we can add the equations.</em>

16m + 3m - 4n + 4n - 28 + 9 = 0

19m + 0n - 19 = 0

19m - 19 = 0

19m = 19

<em>m = 1</em>

<em>Now we put m back into one (or both) of the original equations.</em>

4(1) = n + 7

4 = n + 7

<em>n = -3</em>

<em>If you plug m into the other equation, you get the same result.</em>

<em />

Substitution method:

4m = n + 7

3m + 4n + 9 = 0

<em>With this method, we plug one of the equations into the other one. I'm going to use m in the second equation as a substitute for m in the second equation.</em>

3m + 4n + 9 = 0

3m = -4n - 9

m = (-4/3)n - 3

<em>Now I can substitute the right side into the first equation like so:</em>

4[(-4/3)n - 3] = n + 7

(-16n)/3 - 12 = n + 7

(-16n)/3 = n + 19

-16n = 3(n + 19)

-16n = 3n + 57

0 = 16n + 3n + 57

0 = 19n + 57

0 = 19n/19 + 57/19

0 = n + 3

<em>-3 = n</em>

<em>And then we put that back into one of the original equations.</em>

4m = n + 7

4m = -3 + 7

4m = 4

<em>m = 1</em>

Hopefully you learned something from this.

5 0
3 years ago
My dad kicked me out of middle school and put me into a online school. so now I can't see any of my friends. And my dad deleted
aliya0001 [1]

Step-by-step explanation:

Aw poor thing :(. I'm so sorry, honey. Is there anything I can do? If you need to vent or talk about it you're always welcome to talk to me. I haven't seen my friends since March so I understand. If there is anything that I can do I will gladly do it if possible. Stay safe ❤️.

4 0
3 years ago
Read 2 more answers
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