Answer:
30-21x
Step-by-step explanation:
Multiply parentheses by -7, then add the numbers.
Ok so easy. So the equation is y=mx+b where m is the slope. You get slope by doing y2-y1 /x2-X1. Ok so I'm assuming you know which one is y1 and which one is y2 if not comment back and I answer.
Answer:
50 7th grade and 40 8th grade
Step-by-step explanation:
1. add to get total number of students, 1440
2. find percentage of total that are 7th grade students and 8th grade student:
640/1440 = ~45% (are 7th grade)
800/1440 = ~55% (are 8th grade)
3. 55% of 90 is 50, and 45% of 90 is 40
Answer: 24 laps
Step-by-step explanation: it’s a ratio, so a fraction. 4/6 = x/36
cross multiply and get 6x = 144
divide by 6 and get x = 24