Answer:
-4 or 5
Step-by-step explanation:
let number be x
x²-x=20
Rearrange
x²-x-20=0
(x+4)(x-5)=0
Separate
x+4=0, x-5=0
x=-4 or 5
Answer:
Option A, The pen cost less than $0.35.
Step-by-step explanation:
The given inequality is d ∠ 0.35
Now we have to define this inequality with the help of given options.
If d represents the cost of pen, then cost of pen should be less than 0.35.
Option A, The pen cost less than $0.35. is the answer.
Answer:

Step-by-step explanation:
Given

Required
Find the equivalent;
To find the equivalent of the given expression, we make use of laws of indices;
Using the following law of indices;

So;
becomes

------------ This is one equivalent
Solving further;
Using the following law of indices;

So;
becomes


Hence;

Conclusively; the equivalents of
are 
Total change in relation to when Greg first started decreasing his run time : -6 minutes (at the end of 6 weeks)
Expression : -x (x is the number of weeks)
Answer:
4.
- this shows that the height of 13 year old females in one class is less variable than the other class.
- this means that the height of students in class with range 6 may vary from person to person while that in class with range 3 maybe clustered around one another.
- we're expected to see students of almost same height in class ,with range 3, more than the students in class with range 6.
5.
arranging the values in ascending order
2, 2, 4, 4, 4, 5, 6, 6, 6, 8, 8, 9



median = 1/ 2 [ n/2th term +{ (n/2)+ 1 }th term ]
for n is even
= 1/ 2 [ 6th + 7th term]
= 1/ 2 [5 + 6]
= 5.5
mode = value with highest frequency or the value that appears most frequently In a given set of data.
mode =4, 6
because both 4and 6 appear 3 times in the given set of data which is the highest frequency.