Answer: 7
Step-by-step explanation: Cross multiply, so 15 times x and 21 times 5. 21 times 5 is 105 then you divide by 15 which gives you 7.
38
430
49
mph I think... maybe
Y=mx+b, m= slope, b= y intercept, plug in. Y=3x+5
Answer:
The sum is 2275
Step-by-step explanation:
Given

Required
The sum
Using arithmetic progression, we have:

Where:
--- first term
--- last term


So, we have:



