Answer:
Step-by-step explanation:
1/7x+1/3x=1
3/21x+7/21x=1
10/21x=1
x=21/10 hour or 2 hours and 1 minute
Answer:
He is incorrect
Step-by-step explanation:
He is incorrect because if there is one line in a graph even though you put two equations, that just means that any number is possible (Infinitely Many Solutions). An empty set is a set with no elements so that would be wrong.
Answer:
10
Step-by-step explanation:
The first thing you have to do is find a way to make the last digit 6 (since its $56). So that would be $8×2=16, so there are 2 small notebooks. Then, she needs another $40 to get $56, so 40÷10=4, so she bought 4 large notebooks.
Answer: 2 small, 4 large
Answer: 10 because of Pythagorean theorem
