Answer:
2 science fiction and 5 mystery
Step-by-step explanation:
First, we will set up a system of equations.
x (science fiction) y (mystery)
x + y = 7 This is the total books bought.
7x + 9y = 59 The amount of each set to the total cost.
Now we solve.
(-7)x + y = 7 equals
-7x - 7y = -49
added to
7x + 9y = 59
this equals
2y = 10
y = 5
Now we know one. We can plug it in to find the other value.
x + 5 = 7
x = 2
No if it it was 16.450 then it would be equal to 16.45
Answer:
32 daffodils bulbs and 28 crocus bulbs
Step-by-step explanation:
Assuming 'x' as Crocus and 'y' as daffodil. Now we'll form equations.
-> for 60 small flowering bulbs
x+y=60
x=60-y --->eq(1)
->Crocus bulbs cost $0.25 each and daffodil bulbs cost $0.65 each with the budget $27.80
0.25x + 0.65y = 27.80 -->eq(2)
Next is to substitute x=60-y in eq(2)
(2)=>0.25(60-y) + 0.65y = 27.80
15 - 0.25y + 0.65y = 27.80
0.4y = 12.8
y = 12.8/ 0.4
y= 32 daffodil bulbs
Now, plugging the value of y in eq(1)
(1)=>x=60-32
x= 28
x=28 crocus bulbs
Therefore, you can buy 32 daffodils bulbs and 28 crocus bulbs
Answer:
The mean and SD will change
The median is a better measure of the center since it will not change in this case
Step-by-step explanation:
Given that the value 100 was changed to 15, what will happen is that the value of the mean will decrease since there is a lower total value now. This will consequently decrease the value of the standard deviation too.
Yes, the median will be a better choice
This is because, by changing the value of 100 to 15, the value of the median stays the same and thus the previous information would not be changed if the median we used .
The cost of 5 apples is $6