Let <em>A</em> be your age, <em>B</em> be the age of your brother and <em>S</em> be the age of your sister.
Since your brother is 1/4 your age, then:
Since your sister is 8 years older than your brother, then:
Since your sister is 12 years old, then:
Use the second equation to find your brother's age by plugging in <em>S=12</em>:
Plug in <em>B=4</em> in the first equation to find your age:
Therefore, you are 16 years old.
Answer:
141.75 pounds
Step-by-step explanation:
20.25* 7 = 141.75 pounds
You could also add 20.25 + 7 seven times.
Answer:
s = CDw/12d
Step-by-step explanation:
12ds = CDw
12d * s = CDw
s = CDw/12d
Supplementary = equal to 180 degrees.
We can set up an equation.
2x + x = 180
Combine like-terms:
3x = 180
Divide both sides by 3 to isolate the x.
x = 60.
So one angle is 60 degrees and since the other one is twice of x, it is 120 degrees. If you add 120 and 60 degrees, you should get 180 degrees.
Nevertheless, the measures of the angles are 60 and 120 degrees.
100=(22+bob)+bob
Bob=78/2
Bob=39
Lisa= 39+22
Bob drove 39 miles
Lisa drove 61 miles
