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Yakvenalex [24]
3 years ago
9

In a test, +3 marks are given for every correct answer and -1 are given for every incorrect answer (i) Sona scored +20 marks tho

ugh she got 10 correct answers. How many incorrect answers has she attempted??
Mathematics
1 answer:
e-lub [12.9K]3 years ago
4 0

Answer:

10 incorrect answers

Step-by-step explanation:

Correct answer = +3

Incorrect answer = - 1

Mark scored = 20

Number of correct answers = 10

Let:

Incorrect answers = y

Hence, we can fashion out the expression for total score :

(Number of correct answers * score per Correct answer + number of incorrect * score per incorrect) = total score

(10 * 3) + (y * - 1) = 20

30 - y = 20

-y = 20 - 30

-y = - 10

y = 10

10 incorrect answers

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What is 10+2p=12+1.5p <br> p=
Allushta [10]

Answer:

p=4

Step-by-step explanation:

5 0
3 years ago
How do you do this?PLZ HELP
Alisiya [41]
3(x^2+10x+5)-5(x-k)=
3x^2+30x+15-5x+5k=
3x^2+25x+15+5k

for this to be divisible by x every term must include x or get eliminated

the problematic terms are 15 and 5k
to eliminate them they must equal 0 when added:
15+5k=0
5k=-15
k=-3

so A) -3 is the solution
5 0
3 years ago
The population of Groverdale is
wolverine [178]

Answer: Yes alaina is correct

Step-by-step explanation: first look at the populations

553,000

535,841    

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Hope this helps :)

6 0
3 years ago
Find the surface area of a square prism with a side measure of 6.
Vesnalui [34]
The surface area of any solid is the summation of all the areas of its faces. For a square prism, the surface area is therefore calculated through the equation,
                             A = 6e²
where A is area and e is the measure of the side. 

From the given above, it is stated that the edge of the prism measures 6. Substituting this value to the equation above,
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3 0
3 years ago
Solve the equation. Check your solution.
Tasya [4]

Answer:

x = 5

Step-by-step explanation:

x^2/(x + 5) = 25/(x+5)      Subtract the right side from both sides.

x^2/(x + 5) - 25/(x + 5) = 0

x^2 - 25

=======   = 0

x + 5

(x + 5)(x - 5)

============= = 0

(x + 5)

Cancel x + 5 in the numerator and denominator.

x - 5 = 0

x = + 5

Does it check?

x^2/(x + 5) = 25/(x + 5)

x = 5

5^2/(10) = 25/10

25/10 = 25/10 Yes it checks.

7 0
3 years ago
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