Answer:
90t-21t=69t
Step-by-step explanation:
4:00pm to 6:00 am is 14 hours. 14 x 1.5 is in fact 21 which means the temperature dropped 21 degrees in those 14 hours.
 
        
             
        
        
        
Answer:
uh take or add x plus the y then z =5
Step-by-step explanation:
 
        
             
        
        
        
If x = -2, y = 6.
To solve this quesiton, we need to find the value of y if x is equal to -2. We can do this by substiuting the value of x and then solving.
y = 2 (-2) + 10
y = -4 + 10
y = 6
 
        
                    
             
        
        
        
Hi! :)
It sounds like you need to multiply this fraction. 

*16=6
So, Marge used 6 total inches of tape. 
Hope this helps!
 
        
             
        
        
        
Answer:
1. A. 1
2. D. 
Step-by-step explanation:
Properties used:
- Power of a Power Property
 - Product Property
 - Quotient Property
 - Zero Exponent Property
 
1. First, let's deal with the numerator.
 can be turned into 
 by using the Power of a Power Property.
And then use the Product Property, 
So now, our fraction is this: 
All number over itself in a fraction is equal to 1. But you can also do this the mathmatic way using the Quotient Property: 
 or 
. Which then you plug the numbers in: 
. And since we know that in Zero Exponent Property: 
, we can see that 
. So either way, we get 1.
So the answer is 1, which is A
2. Power of a Power Property: 
So plug the numbers in the property: 
= 
Product Property: 
We plug the equation in with 
 turned into 
 ---

So the answer is 
, which is D
I hope this helps!
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Have a great day!