Answer:
The answer for number 2 is c.
Step-by-step explanation:
I apologize I'm not exactly sure how to explain it but I know it's c.
Answer:
No.
Step-by-step explanation:
Let's substitute y=10 on the first equation. -10-52=5 doesn't match
Answer: 12 h ; 45 m
Step-by-step explanation:
*Important: From what I can see in this image, this appears to be a test. If this is the case, please do not cheat. In any case, here is the explanation.
What we know:
- Progress has been made to 4.75
- Rate of digging is 3/5 mph
- Depth must be at least 12 1/2
- We need to find the minimum amount of time the machine works
How to solve:
By setting up an algebraic equation, we can solve this.
Process:
- Set up equation 4.75 + 3/5x = 12 1/2
- Convert 19/4 + 3/5x = 12 1/2
95/20 + 12/20x = 250/20
12/20x= 155/20
- Isolate x via division /(12/20) /(12/20)
- +Simplify
x= 12 11/20
Solution: 12 ; 45
Answer: 72 = 2^3 * 3^2
72 is even so 2 is a factor ; 72/3 = 36
36 and 36/2 = 18 are also even so we have two more 2’s as prime factors. 18/2 = 9 = 3*3 hence we have two 3’s as prime factors
Therefor the prime factors of 72 are 2*2*2*3*3 or 2^3*3^2
Answer: 20
Step-by-step explanation: