Can someone please help me.....
In my math class they want us to write this so everyone would understand how to do it.
The three angles in a triangle always add up to 180°. If one angle in a
triangle is 72° and the second is 2 times the third, what are the three
angles? (Answer is 72°, 72°, 36°)
HERE IS A EXAMPLE OF HOW THEY WANT US TO DO IT.....
#5 Julio’s Trip
Julio has found that his new car gets 36 miles per gallon on the highway and 31 miles per gallon in the city. He recently drove 397 miles on 12 gallons of gasoline. How many miles did he drive on the highway? How many miles did he drive in the city?
1. X = number of gallon used on high way
Y = number of gallon used in the city x gallon used
T = miles driven
2. The equation is:
(gallon used on high) + (gallon used on the city x gallons used) = miles driven
X + Y = T
3. X = 36x
Y = 31(12 – X)
T = 397
4. 36x + 31(12 – x) = 397
36x + 372 – 31x = 397
Let’s clean up the problem and solve for X;
36x - 31x = 397 – 372
5x = 25
X = 5
X = 5 gallon used on high way
To get total miles driven on a highway is;
(gallon used on high way) x ( high way miles per gallon)
5 x 36 = 180 total miles driven on a highway
To get total miles driven in the city is;
(total gallon) – (gallon used on highway) = gallon used in the city
12 – 5 = 7
To convert to total miles drive in the city;
(gallon used in the city) x (city miles per gallon) = total miles driven in the city
7 x 31 = 217 total miles driven in the city
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