Uhh the first one? I can't see a picture or anything....
10.20 x 9 = 91.8
( It's William and nine/eight friends, since they're dividing it among ALL people we count William in. )
A: William and nine friends <span>divided the bill evenly. If each person paid $10.20, what was the total bill?
</span>
10.20 x 10 = 102
B: <span>At a restaurant, William and eight friends divided the bill evenly. If each person paid $10.20, what was the total bill?
10.20 x 9 = 91.8
C: </span><span>At a restaurant, William and nine friends divided the bill evenly. If the total bill was $91.80, what did each person pay?
91.80 x 10 = 918
D: </span><span>At a restaurant, William and eight friends divided the bill evenly. If the total bill was $91.80, what did each person pay?
</span>91.80 x 9 = 826.2
So, your answer is B
Answer: Your brother is 15 years old right now.
Step-by-step explanation:
Let be "m" your currently age and "b" your brother's currently age.
Knowing that right now he is three times (this indicates multiplication) as old as you, you can write the following equation:
![b=3m](https://tex.z-dn.net/?f=b%3D3m)
In five years your age will be:
![m+5](https://tex.z-dn.net/?f=m%2B5)
And your brother's age will be:
![b+5](https://tex.z-dn.net/?f=b%2B5)
Then, if in five years, your brother will be twice as old as you, you can set up the second equation:
![b+5=2(m+5)](https://tex.z-dn.net/?f=b%2B5%3D2%28m%2B5%29)
Then, the System of equations is:
![\left \{ {{b=3m} \atop {b+5=2(m+5)}} \right.](https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bb%3D3m%7D%20%5Catop%20%7Bb%2B5%3D2%28m%2B5%29%7D%7D%20%5Cright.)
Apply the Substitution method and substitute the first equation into the second one and solve for "m":
![3m+5=2(m+5)\\\\3m+5=2m+10\\\\m=10-5\\\\m=5](https://tex.z-dn.net/?f=3m%2B5%3D2%28m%2B5%29%5C%5C%5C%5C3m%2B5%3D2m%2B10%5C%5C%5C%5Cm%3D10-5%5C%5C%5C%5Cm%3D5)
Substitute the value of "m" into the first equation and evaluate in order to find "b":
![b=3(5)\\\\b=15](https://tex.z-dn.net/?f=b%3D3%285%29%5C%5C%5C%5Cb%3D15)
Answer
180 - x
Step-by-step explanation:
opposite angles of a quadrilateral inscribed in a circle are supplementary
The answer is a and the it do not have y intercept