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kupik [55]
2 years ago
15

Students are taking a Math test that has 28 questions and is worth 100 points , Some of the questions are worth 3 points and the

rest are worth 4 how many of each type of problem are on the test
Mathematics
1 answer:
Y_Kistochka [10]2 years ago
4 0

Answer:

There are 12, 3-point problems & 16, 4-point problems

Step-by-step explanation:

3-point problem = x

4-point problem = y

Total points = 100

Total problems = 28

According to given statement; x+y=28  

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Vincent has already finished 5 oil changes today, and can complete more at a rate of 1 oil change per hour. Warren just came on
IrinaVladis [17]

Answer:

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3 years ago
What is the numerator of the simplified sum?
sashaice [31]

Answer:

4x + 6

Step-by-step explanation:

\frac{x}{x² + 3x + 2} + \frac{3}{x + 1}

To determine what the numerator would be, after simplifying both fractions, take the following steps:

Step 1: Factorise the denominator of the first fraction, x² + 3x + 2.

Thus,

x² + 2x + x + 2

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x(x + 2) +1(x + 2)

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We would now have the following as our new fractions to add together and simplify:

\frac{x}{(x + 1)(x + 2)} + \frac{3}{x + 1}

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Highest common factor of (x + 1)(x + 2) and (x + 1) = (x + 1)(x + 2)

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Thus,

\frac{x}{(x + 1)(x + 2)} + \frac{3}{x + 1}

\frac{x + 3(x + 2)}{(x + 1)(x + 2)}

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\frac{4x + 6)}{(x + 1)(x + 2)}

Therefore, the numerator of the simplified form sum of both fractions = 4x + 6

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