Answer:
x=7 and y=4
Step-by-step explanation:
I will use the elimination method:
Since the co-efficient of both y's are the same number but different signs we add the 2 equations to eliminate the y:
3x + y =25
+ + +
2x - y = 10
Simplify:
5x=35
Divide both sides by 5:
5x÷5=35÷5
Simplify:
x=7
Substitute this into either equation 1 or 2 ( I chose 1):
3(7) + y = 25
21 + y = 25
Subtract 21 from both sides and simplify to get y:
21+y-21=25-21
y=4
Therefore x=7 and y=4
13km 500m = 13.5 km
The car consume 1 liter of petrol every 6 km, so for 13.5 km it will consume: 13.5 x 1 / 6 = 2.25 liters
Answer:
Step-by-step explanation:
g(x) - f(x) = 
<em><u>Multiply the -1 in then add the two expressions together.</u></em>
Answer:
6
Step-by-step explanation:
Multiply all three sides by 8 to get x by itself
16/3 < x < 7
5 1/3 < x < 7
so it’s between 5 and 1/3 and 7. the only answer between those two would be 6. 3 and 4 is too less. 5 is also too less.
