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3 years ago

8-x+4-2-8x= What does x equal

Mathematics

1 answer:

goldfiish [28.3K]3 years ago

3 0

Answer:

-9x + 10

Step-by-step explanation:

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In a test (+4) marks are given for every correct answers and (-3) marks are given for every incorrect answers 1) Tahiya answered

stealth61 [152]

Answer:

Tahiya attempted 3 incorrect answers.

Helmin attempted 11 incorrect answers.

Step-by-step explanation:

Correct = +4

Incorrect = -3

1) Tahiya got 12 correct answers and scored a 40, the number of incorrect answers was:

$4*12-3I=40\\I=\frac{8}{3}\\I=2.67$

2) Helmin got 5 correct answers and scored a -14, the number of incorrect answers was:

$4*5-3I=-14\\I=\frac{34}{3}\\I=11.33$

In both cases the number of incorrect answers obtained is a fraction, which means that either the data provided is inaccurate, or that the scores obtained by the students are approximate. Let's round the number of incorrect answers to the nearest whole answer.

Tahiya attempted 3 incorrect answers.

Helmin attempted 11 incorrect answers.

4 0

3 years ago

You buy 7 gallons of gasoline at p dollars per gallon and pay $26.88. What is

Nookie1986 [14]

Answer:

3.84

Step-by-step explanation:

26.88 divided by 7 equals 3.84

Hope this helps!

4 0

3 years ago

Read 2 more answers

What is the slope between the points (8, -2) and (-7, 10)

Anna [14]

The slope = -0.8

Hopefully this helped you!

6 0

3 years ago

Find the value of X such that the data set has the given mean. 99, 123, 105, 114, 107, X; mean 108

Ulleksa [173]

Answer:

The value of x is 100

Step-by-step explanation:

* Lets revise how to find the missing number of the given Mean

- Add up the numbers you know.

- Set up your equation by adding the sum of the numbers plus “x”

- Divide the sum by the number of numbers given.

- Equate them by the value of the mean

- Solving for "x"

- Check the Answer

* Now lets solve the problem

- The numbers are 99 , 123 , 105 , 114 , 107

- The sum of the numbers = 99 + 123 + 105 + 114 + 107 = 548

- The equation is ⇒ (548 + x)/6 = 108 ⇒ × 6 both sides

∴ 548 + x = 648 ⇒ subtract 548 from both sides

∴ x = 100

* Now lets check the answer

- The mean = (99 + 123 + 105 + 114 + 107 + 100)/6 = 648/6 = 108

∴ The answer x = 100 is correct

* The value of x is 100

8 0

3 years ago

Read 2 more answers

What are the coefficients of this expression 7a+23b +2c + 16

antiseptic1488 [7]

Answer:

Step-by-step explanation:

A coefficient is basically the number infront of a variable or term.

E.g. the coefficient in 7x is 7

The coefficient in 23y is 23

The coefficient in 43a is 43.

So for your question: 7a + 23b + 2c + 16,

The coefficients are 7, 23 and 2

6 0

4 years ago