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lubasha [3.4K]
3 years ago
5

Solve the equation above

Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0

Answer:

X = -2

Step-by-step explanation:

1/2 X (5X-8) = -9

multiply both sides of the equation by 2

2 X 1/2 X (5X - 8) = 2 X (-9)

1 X (5X - 8) = 2 X (-9)

Reduce the numbers with the greatest common divisor 2

5 x -8 = 2 x (-9)

5 x -8 = -18

Move constant to the right by adding its opposite to both sides

5X -8 + 8=-18 + 8

Then eliminate the opposites

5X = -18 + 8

Calculate the sum

5X = -10

Divide both sides of the equation by 5

5X DIVIDE 5 = -10 DIVIDE BY 5

X = -10 DIVIDE BY 5

X = -2

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Challenge Problem/Group Activity
8_murik_8 [283]

The different ways that they can vote is given as 16 different ways.

<h3>How to calculate the ways that they can vote</h3>

The question say that there are a total of 4 members of the board. Out of these 4, we have the choices as yes or a no.

This tells us that each person only has 2 choices of what they want.

Hence given that the board members ar 4, we would have 2⁴

= 2 * 2 * 2 * 2

= 16

Hence the different ways that they can all vote is 16.

Read more on permutations and combinations here:

brainly.com/question/4658834

SPJ1

8 0
2 years ago
PLEASE HELP!! Will give Brainliest!
Greeley [361]

Answer:

A) 11/36

Step-by-step explanation:

x + 4/9 = 3/4

get a common denominator of 36  (4*9 = 36)

x + 4/9 * 4/4 = 3/4 * 9/9

x + 16/36 = 27/36

subtract 16/36 from each side

x + 16/36 - 16/36 = 27/36 -16/36  

x = (27-16)/36

x = 11/ 36


6 0
3 years ago
Read 2 more answers
Find the midpoint of AB if a (-1,7) and B (11,-1)​
Nady [450]

Answer:

  • (5, 3)

Step-by-step explanation:

<h3>Given </h3>
  • Points A(-1,7) and B (11,-1)​
<h3>To find</h3>
  • Midpoint of AB
<h3>Solution</h3>

<u>Using midpoint formula</u>

  • x = (-1 + 11)/2 = 10/2 = 5
  • y = (7 -1)/2 = 6/2 = 3

Midpoint is (5, 3)

8 0
3 years ago
Read 2 more answers
The average credit card debt for college seniors is $22,199 with a standard deviation of $5300. What is the probability that a s
noname [10]

Answer:

Step-by-step explanation:

The number of samples is large(greater than or equal to 30). According to the central limit theorem, as the sample size increases, the distribution tends towards normal. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

µ = 22199

σ = 5300

n = 30

the probability that a senior owes a mean of more than $20,200 is expressed as

P(x > 20200)

Where x is a random variable representing the average credit card debt for college seniors.

For n = 30,

z = (20200 - 22199)/(5300/√30) =

- 2.07

Looking at the normal distribution table, the probability corresponding to the z score is 0.0197

P(x > 20200) = 0.0197

3 0
3 years ago
A 20 foot rope is cut so that one piece is 5 feet longer than the other. Find the length of each piece
hammer [34]

Let one piece of the rope be x

Let the other piece of rope be x + 5

These two pieces put together will make 20 feet.

So we say:

x + (x +5) = 20

What is x? We expand the equation.

x + x + 5 = 20

x + x = 20 - 5

2x = 15

x = 7.5

The shorter piece is  therefore 7.5 feet.

The longer piece is 7.5 + 5 = 12.5 feet.



5 0
3 years ago
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