Answer:
10 SENIORS
Step-by-step explanation:
x=# of seniors
y=# of juniors
x+y=23, x=2y-7
- plug the value of x in the second equation into the first
- (2y-7)+y=23
- Remove parentheses
- 2y-7+y=23
- Combine like terms
- 3y-7=23
- Add 7 to BOTH sides
- 3y=30
- divide BOTH sides by 3
- 3y/3=30/3
- y=10
- There are 10 juniors in the class
- FINAL STEPS
- Plug y (which is 10) into the first equation
- x+y=23
- x+10=23
- subtract 10 from BOTH sides
- x=13
- Since X equals the number of seniors, there are 10 seniors in the class
Answer:
43.2 × 10^-6
Step-by-step explanation:
(6 x 10^-8)(7.2 x 10^4)
43.2 × 10^-6
Answer: C
Step-by-step explanation:
You have to multiply the x by 75 to get the y value
1 x 75 = 75
2 x 75 = 150
3 x 75 = 225
And so on...
k * 3 = s
k = Katie and s = Sarah
Although you did say expression, what I have is an equation.
