Answer:
Step-by-step explanation:
Add the above equations we get
6x=12
x=2
2+3y=-4
3y=-6
y=-2
Answer:
I think Mr.G took her lunch!
Step-by-step explanation:
Read the paragraph over again. What kind of behavior stands out?
- "Mr.G... fresh spaghetti stain on his shirt.."
- He was in her classroom.
- "Mr.G widened his eyes a little..." It seems suspicious doesn't it?
- He was stuffed but still had his lunch, what does this tell you?
Answer:
B. The width of the confidence interval would be smaller.
Step-by-step explanation:
By reducing the confidence level from 99% to 95%, the student assumes that there is more uncertainty about the new confidence interval than the previous one. That, being said, since the results aren't as certain, the confidence interval is widened towards a central average point because the new interval isn't as accurate.
Therefore, the answer is B. The width of the confidence interval would be smaller.
Answer:
Step-by-step explanation:
Since a,b,c and d are integers,
bd, ad and cb are also integers because product of two integers is an integer
Also, ad + cb is an integer because sum of two integers is an integer.
(ad + cb)/bd is a rational number
a/b + c/d is a rational number
It's the same because it's used the commutative property where:
a+b = b+a
So, 86+68+38=192 it's the same sum as 68+38+86=192
