Answer:
C
Step-by-step explanation:
We know it's direct variation using the direct variation equation.
Where k is the constant.
Since 7 times x is the y values, 
Now we can substitute 7 into k of the direct variation equation.
5 x 7 = 35 5 rows with 7 items in each row. You can put this down on paper and count each dot or just memorize 5 x 7 =35
Answer:
13
Step-by-step explanation:
there is a rule that says that if you add any 2 sides, it should be more than the third. 9+21 is greater than 13. 21+13 is greater than 9. 13 is the only number which if you add 9 to it it will be greater than 21. 12 will equal 21, but it still wont work.
hope this helps :))
Negative since the answer would be -13
Answer:
You will pay $42.50
Step-by-step explanation:
You will pay 50-7.5 which gives you 42.50
