Answer:
40%
Step-by-step explanation:
You subtract 20 from 12 to get 8.
Divide 20 from 8 to get 0.40.
Answer:
B) 
Step-by-step explanation:
We are given,
The graph of the parabola opens downwards.
This means that the leading co-efficient of the function will be negative.
So, options C and D are not possible.
Moreover, it is given that the graph cuts x-axis near
i.e.
= 1.5 and
i.e.
= 4.5.
i.e. At y=0, the value of x is near
and
.
A. So, in
, we put y =0.
i.e. 
i.e. 
i.e. x = 0.68 and x = 3.41
We see that this does not crosses the x-axis at the given points.
So, option A is wrong.
B. Also, in
, we put y =0.
i.e. 
i.e. 
i.e. x = 1.68 and x = 4.41.
Thus, this equation cuts the x-axis near the given points i.e. 1.5 and 4.5.
Hence, the equation of the given graph is
.
Answer:
10/14, 15/21
Step-by-step explanation:
WE are given a ratio 5/7
To find equivalent ratios it is sufficient to multiply both numerator and denominator by the same number
Let us take 2,3 for example.
When we multiply both numerator and denominator by 2, value does not change.
Hence we get equivalent fraction.
So 10/14 is one such fraction.
Next is multiply by 3
15/21 is another fraction.
Answer:
The mean number of deliveries for driver A is less then the mean for driver B by 3 MADs.
Answer:

Step-by-step explanation:
We just need to add like terms together


