Answer:
let the angles be 7x , 13x , 16x
7x + 13x + 16x = 180 ( sum of angles in a triangle is 180 degree)
36x = 180
x = 180 / 36
x = 5
therefore the angles are:
7 X 5 = 35 degree
13 X 5 = 65 degree
16 x 5 = 80 degree
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Speed equals distance over time.
16.5 km/ 0.25 hrs= 66 km/hr
Final answer: 66 km/hr
Substitution, which can also be taken as the equal values method. You just put in the first equation for y, as it’s the same thing.
2x+2=7x+11
-2 from both sides
2x=7x+10
-7x from both sides
-5x=10
divide both sides by -5
x=-2
Then you substitute -2 for x into one of the equations.
y=7(-2)+11
y=-14+11
y=-3
Your solution is (-2,-3).
Answer:
you save $90 each week your brother save $71 each week.
so your answer would be your brother saves $19 less than you each week
