Answer:
it's 5.5
Step-by-step explanation:
Answer:
35 two-points questions.
Step-by-step explanation:
The exam is worth 145 points.
The exam has 50 questions.
Some questions are worth 2 points and;
Some are worth 5 points.
Let the number of two-points questions be x and;
The number of five-points questions be y
This creates a simultaneous equation below:
x + y = 50 ... (i)
2x + 5y = 145 ... (ii)
Multiplying (i) by 2 and (ii) by 1 we get;
2x + 2y = 100 ... (i)
2x + 5y = 145 ... (ii)
Subtracting (ii) - (i) we get;
0 + 3y = 45
3y = 45
y = 15
So the number of five-points questions is 15 and the number of two-points questions is 50 - 15 = 35
First part : 3x
second part : x
third part :x-10
3x+x+x-10=100
5x=110
x=22
first part : 66
second part : 22
third part :12
Answer:
•0.5
Step-by-step explanation:
We'll assume the dilation was done at the origin point, so it was done evenly.
Since the k point went from (10,0) to (5,0), we know it was reduced... so the scale factor has to be below 1. A scale factor means the size wasn't changed and a dilation/scale factor larger than 1 means it was enlarged.
So, we take the new X-value (5) and divide it by the original X-value (10).
Scale factor = 5/10 = 1/2... so 0.5
