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Nitella [24]
3 years ago
10

The score on a trivia game is obtained by subtracting the number of incorrect answer from twice the number of correct answer. If

a player answered 50 total question and obtained a score of 40 , how many questions did the player answer correctly?
Mathematics
1 answer:
brilliants [131]3 years ago
3 0

Answer:

The player answer correctly 30 questions

Step-by-step explanation:

First we have to develop the information that gives us as 2 equations

x = correct answer

y = incorrect answer

z = score = 40

h = total answer = 50

2x - y = z               x + y = h

2x - y = 40             x + y = 50

we clear the x of one equation and replace the value of x in the other equation

x = 50 - y

2x - y = 40

2(50 - y) - y = 40

100 - 2y - y = 40

-3y = 40 -100

y = -60/-3

y = 20

x = 50 - y

x = 50 - 20

x = 30

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Step-by-step explanation:

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damaskus [11]
Answer: I believe the answer is 216 Square units.

Explanation:
1. Cut the shape in half. Now you have a square and a triangular shape.

2. The square is 12 inches on all four sides. 12 • 12 = 144. 144 is the area for the square.

3. Now, the triangular shape. The bottom of the shape is 12 because we divided the total 24 in half with the square. The left side (the longer side) of the shape is also 12 because it is parallel to the square with 12 as the same measurement. The right side (the shorter side) of the shape is 6 because it's half the size of the square’s length. The length of the top of the shape is also 12 because it is half of the square’s width of 24.

4. Now that we have found the measurements of the triangular shape, we can multiply (length • width) and add. The square is 144 units (12•12=144) and the triangular shape is 72 (12•6=72). 144 + 72= 216.

I hope this helps! :)
6 0
3 years ago
Couldn't do this one help needed
Paladinen [302]

Answer:

shown below.

Step-by-step explanation:

v = 150 since 180 - 30

for w we need 2y and x. the base angles of the triangle are 30 and 50 therefore x = 100. 2y = 30 because corresponding angles. ergo, w = 50

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2 years ago
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I = multiply the Inside number        1 and x
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3(x^2 + -4x + -5)
multiply the numbers inside the parenthesis by 3
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3 years ago
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