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Sagot :
The equation that can be used is 90-10y=5x. In order to get this answer, you first start with figuring out how many miles total were hiked for each trail. The 5-mile mountain trail total would be equal to 5x and the 10-mile canal trail total would be 10y. Adding both of these totals together would give you 90 miles and an equation of 5x+10y=90. All you do now is rearrange the equation by subtracting 10y from each side and you get 90-10y=5x.
Answer:
[tex]\boxed{\boxed{C.\ 90-10y=5x}}[/tex]
Step-by-step explanation:
Let us assume that
x represents the number of times she hiked the 5-mile trail,
y represents the number of times she hiked the 10-mile trail.
If Maria hiked 5-miles trail for x number of times, so distance hiked by her is 5x miles.
If Maria hiked 10-miles trail for y number of times, so distance hiked by her is 10y miles.
So the total distance hiked by her is the sum of both 5 mile and 10 mile trail, so total distance hiked by her is,
[tex]=5x+10y[/tex]
But this is given as 90 miles, so
[tex]\Rightarrow 5x+10y=90[/tex]
[tex]\Rightarrow 5x=90-10y[/tex]
[tex]\Rightarrow 90-10y=5x[/tex]
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