jazminecrosby
30.08.2019 •
Mathematics
Explain to your homewok heper how5-groups you see 6,7,8,9,10
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Ответ:
Step-by-step explanation:
Part ATotal time is 110 min, the equation:
x + y = 110Tennis takes 40 min longer than swimming, the equation:
x = y + 40Part BSubstitute x and solve for y:
y + 40 + y = 1102y = 110 - 402y = 70y = 35 minSwimming takes 35 min
Part CLet x = 70, then we get:
70 + y = 11070 = y + 40For the first equation we get y = 40 min
For the second equation we get y = 30 min
No solution, therefore it is not possible