Answer:
3,2
Step-by-step explanation:
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Answer:
![\text{r}=5.5\text{c}-20](https://tex.z-dn.net/?f=%5Ctext%7Br%7D%3D5.5%5Ctext%7Bc%7D-20)
Step-by-step explanation:
GIVEN: On a
question test students gain
points for each correct answer and lose
points on each incorrect answer. If everyone required to give an answer to each question.
TO FIND: the formulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c.
SOLUTION:
Total number of incorrect questions ![=40-\text{c}](https://tex.z-dn.net/?f=%3D40-%5Ctext%7Bc%7D)
Total marks deducted due to incorrect question ![=(40-\text{c})\times0.5=20-0.5\text{c}](https://tex.z-dn.net/?f=%3D%2840-%5Ctext%7Bc%7D%29%5Ctimes0.5%3D20-0.5%5Ctext%7Bc%7D)
Total correct questions ![=\text{c}](https://tex.z-dn.net/?f=%3D%5Ctext%7Bc%7D)
Total marks scored ![=6\text{c}](https://tex.z-dn.net/?f=%3D6%5Ctext%7Bc%7D)
Total raw marks ![\text{r}=\text{total marks gained}-\text{total marks deducted}](https://tex.z-dn.net/?f=%5Ctext%7Br%7D%3D%5Ctext%7Btotal%20marks%20gained%7D-%5Ctext%7Btotal%20marks%20deducted%7D)
![\text{r}=6\text{c}-(20-0.5\text{c})](https://tex.z-dn.net/?f=%5Ctext%7Br%7D%3D6%5Ctext%7Bc%7D-%2820-0.5%5Ctext%7Bc%7D%29)
![\text{r}=5.5\text{c}-20](https://tex.z-dn.net/?f=%5Ctext%7Br%7D%3D5.5%5Ctext%7Bc%7D-20)
ormulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c is ![\text{r}=5.5\text{c}-20](https://tex.z-dn.net/?f=%5Ctext%7Br%7D%3D5.5%5Ctext%7Bc%7D-20)
Step-by-step explanation:
Subtracting N by T
(3a2 + 2a - 5) - (2a2 + a + 6)
Subtracting like terms
a2 + a - 11
Answer:
y=2
Step-by-step explanation:
Hope it helps
Answer: First option is correct.
Step-by-step explanation:
Since we have given that
![3+4(16-9)](https://tex.z-dn.net/?f=3%2B4%2816-9%29)
We first solve the brackets:
(16-9) = 7
Now, we multiply it with 4
![7\times 4=28](https://tex.z-dn.net/?f=7%5Ctimes%204%3D28)
Now, we add 3 to it:
![28+3=31](https://tex.z-dn.net/?f=28%2B3%3D31)
Hence, the value of expression would be 31.
Therefore, First option is correct.