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trapecia [35]
3 years ago
14

In a multiple choice examination of 20 questions, four marks are given for each correct answers and one mark is deducted for eac

h wrong answer. There is no penalty for not attempting a question. a candidate attempts "a" questions and get "c" correct. Write down, and simplify, an expression for the candidate's total mark in terms of "a" and "c".​
Mathematics
1 answer:
finlep [7]3 years ago
8 0

Answer:

Total Mark = 5c - a

Step-by-step explanation:

Total Mark = 4c - (a - c) = 5c - a

Marks for correct questions = 4c

Marks deducted for incorrect questions = a - c

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What’s the answer, and how do I find it step-by-step?
pshichka [43]

Answer: 16p^8q^4r^8 The yellow one

Step-by-step explanation:

Step 1: Use Multiplication Distributive Property: (xy)^a = x^a y^a. So 4^2p^2(q^3)(r^4)^2

Step 2: Simplify 4^2 to 16. So 16p^2(q^3)^2(r^4)^2

Step 3: Use Power Rule: (x^a)^b=x^ab. So 16p^2q^6(r^4)^2

Step 4: Use Power Rule: (x^a)^b=x^ab. So the answer is 16p^2q^6r^8. The yellow one

4 0
2 years ago
I need help with number 4 and number 3 please
dangina [55]
For Question 3, 
15      ?
__ = ____
120     100

120?=1500
1500/120=12.5

?=12.5%

Question 4

I think it is $462.80


5 0
3 years ago
-20 = -4x - 6x<br> I need help solving it
eduard

Answer:

the answer is 2

Step-by-step explanation:

add -4x and -6x and the answer is -10x bc they are both negative x. then divide both -10x and -20 by -10 so that it is x by itself on one side and 2 on the other so its 2=x :)

6 0
3 years ago
Marty used the graph to determine if he should go to the beach on vacation. He did not want to go if there were more than 500 pe
slega [8]

Answer:

d

Step-by-step explanation:

he is benifeting from both

6 0
2 years ago
Read 2 more answers
When graphing an inequality what two signs are a closed circle
elena-14-01-66 [18.8K]

Answer: When graphing a linear inequality on a number line, use an open circle for "less than" or "greater than", and a closed circle for "less than or equal to" or "greater than or equal to". Graph the solution set of: -3 < x < 4 The solution set for this problem will be all values that satisfy both -3 < x and x < 4.

Step-by-step explanation:

5 0
2 years ago
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