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Rufina [12.5K]
3 years ago
8

Please answer! ill give you brainliest :)

Mathematics
2 answers:
KiRa [710]3 years ago
8 0
:) okay..............................
Levart [38]3 years ago
6 0

Answer:

answer what?

Step-by-step explanation:

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A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and
Vlad1618 [11]

Using the weighed mean formula, it is found that Mara's average for the course was of 68.6.

<h3>What is the weighed mean?</h3>

The weighed mean is given by the <u>sum of all elements in a data-set multiplied by it's weight, divided by the sum of the weights</u>.

In this problem, the weights are as follows:

  • A quiz has a weight of 1.
  • A test has a weight of 2.
  • The final examination has a weight of 4.

Hence, her weighed mean is given as follows:

M = \frac{2(65 + 62 + 60) + (61 + 96 + 80 + 89) + 4(65)}{6 + 4 + 4} = 68.6

Mara's average for the course was of 68.6.

More can be learned about the weighed mean formula at brainly.com/question/24398353

5 0
2 years ago
Three less than the sum of four times a number and six is eight. Find the number.
vodka [1.7K]
4x + 6 - 3 = 8
4x + 3 = 8
4x = 8 - 3
4x = 5
x = 5/4 <==
6 0
3 years ago
Read 2 more answers
Whats 37/5 as a mixed number or number
podryga [215]
The  answer is 5  and  2/5. Hopefully it is correct!
8 0
3 years ago
Stefanie bought a package of pencils for $1.75 and some erasers that cost $0.25 each. She paid a total of $4.25 for these items,
melamori03 [73]

Answer:

Stefanie bought 10 erasers

Step-by-step explanation:

We can establish the following equation:

TP = NP*PP + NE*EP

Where:

TP = Total price; (4.25)

NP = Number of pencil packages; (1)

PP = Pencil Package's Price; (1.75)

NE = Number of erasers; (What we are looking for)

EP = Erasers Price; (0.25);

Then:

4.25 = 1*1.75 + NE*0.25;

4.25 - 1.75 = NE*0.25;

2.5/0.25 = NE;

10 = NE.

5 0
3 years ago
Please someone helpppp ):
skad [1K]

Answer:

  70 -20x = 60 -15x

Step-by-step explanation:

The amount of money left on Josh's card is ...

  70 -20x

The amount of money left on Jessica's card is ...

  60 -15x

These amounts are the same when ...

  70 -20x = 60 -15x

_____

<em>Additional comment</em>

The solution to this equation is ...

  10 = 5x   ⇒   x = 2 . . same amount after purchase of 2 pizzas

3 0
2 years ago
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