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muminat
1 year ago
6

Please i need help ! its due today ! Class A has 10 pupils and class B has 17 pupils.

Mathematics
1 answer:
Rudiy271 year ago
6 0

Answer:

The mean score is 87

Step-by-step explanation:

79x2=158

158-71=87

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Solve the system of equations: y= x^2 + 2x - 3 and y=3x+ 3.
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Answer:

(-2, -3)

(3, 12)

Step-by-step explanation:

To solve this, we're gonna get rid of the y's with substitution

x² + 2x - 3 = 3x + 3

Let's make this equation equal to zero

Subtract 3 from both sides

x² + 2x - 3 = 3x + 3

            - 3         - 3

x² + 2x - 6 = 3x

Subtract 3x from both sides

x² + 2x - 6 = 3x

    - 3x        - 3x

x² - x - 6 = 0

Factor the equation

(x - 3)(x + 2) = 0

This means x can be -2 or 3

Let's solve it with -2 first, plug the new x in y = 3x + 3

y = 3(-2) + 3

y = -6 + 3 = -3

Do the same for x = 3

y = 3(3) + 3

y = 9 + 3 = 12

3 0
1 year ago
Divide. 83 ÷ 9 Enter your answer by filling in the boxes. __R __
forsale [732]

9R2

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9*9 = 81

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2 years ago
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Which situation is an example of an observational study?
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Two inches is approximately
murzikaleks [220]

Answer:

5.08 cm

Step-by-step explanation: You dont have the choices for answers.

2inches is also 1/6 of a foot, etc

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Which pair is a pair of vertical angles?
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