Answer: Crickets make 172 chirps/min at 80 degrees Fahrenheit
Step-by-step explanation:
Step 1 
 Using the point slope formulae for Linear functions , we have that 
y - y1 = m(x - x1)
where x  and y are two points  representing the  temperature and chirps /min respectively
 And  
m= slope 
 Step 2 : Finding the slope , m
 where x1=60
            y1=92
            x2= 75
            y2=152
 m= (y2-y1)/ (x2-x1)
 = (152- 92)/(75-60)
=60/15 =4
Bringing down the point/slope formula and imputing the known values to find our equation to show the relationship cricket make per minute and  the temperature
 y - y1 = m(x - x1)
y - 92= 4(x - 60)
y - 92 = 4x -240
y = 4x - 240 + 92
y = 4x - 148
 Step 3
 To find the number of chirps be per minute (y) if the temperature is 80 degrees Fahrenheit( x)
y = 4(80) - 160
y = 320 - 148
y = 172 chirps/min at 80 degrees Fahrenheit
 
        
             
        
        
        
Correct answer is Option A: 18/48 = 21/56 
You’ll have to divide the numerator by the denominator of each fraction to see whether they have the same quotient:
18/48 = 0.375
21/56 = 0.375
The other options are not proportional. 
B) 20/28 = 15/18:
 20/28 = 0.714
 15/18 = 0.833
Thus, 20/28 ≠ 15/18
C). 3/5 = 13/10
 3/5 = 0.6
 13/10 = 1.3 
Hence, 3/5 ≠ 13/10
D) 7/10 = 10/7
 7/10 = 0.7 
 10/7 = 1.43 
Thus, 7/10 ≠ 10/7
These solutions prove that the correct answer is A) 18/48 = 21/56
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Answer:
4 1/2 I think
Step-by-step explanation:
I think but I'm not for sure
 
        
             
        
        
        
Answer:
5 seconds
Step-by-step explanation:
In 5 seconds it will be at 98 meters
x = -b/2a
x = -20/2(-2) = -20/-4 = 5
 
        
             
        
        
        
Answer:159
Step-by-step explanation:
ur welcome