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saw5 [17]
3 years ago
6

A)- 5x-9 b)- 6x+20 c)- 6x^2-23x+20 d)- 6x^2-14-9

Mathematics
1 answer:
likoan [24]3 years ago
6 0
Multiply:  (3x-4)(2x-5)

This comes out to 6x^2 - 15x - 8x + 20

Combine the x terms and you'll be done.


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Leslie has 8 pencils.
Rudiy27
17 pencils. I’m preety sure
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3 years ago
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What is the solution to the system of equations? -2x + y = -5 3x – 2y = 12 A) (3, 1) B) (6, 3) C) (-2, -9) D) (-2, -1)
max2010maxim [7]

Answer:

The correct answer is D) (-2, -1)

Step-by-step explanation:

In order to solve this system of equations, start by multiplying the entire first equation by 2. Then add the two equations together. This will get the y's to cancel and allow you to solve for x.

-4x + 2y = -10

3x - 2y = 12

---------------------

-x = 2

x = -2

Now that we have the value for x, we can find y by plugging the x value into either equation.

-2x + y = -5

-2(2) + y = -5

-4 + y = -5

y = -1

6 0
2 years ago
During a period of extreme cold, the average daily temperature dropped decreased by 1. Feach day. How many days did it take for
PtichkaEL [24]

Answer:

The answer is 9 days

Step-by-step explanation:

First, we realise

-1.F = 1 day

-9.F = 9 days

The -1.F times 9 gives us one so the days times 9 as well.

Answer = 9

4 0
3 years ago
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
jekas [21]

Using the normal distribution, it is found that 1851 people would have an IQ less than 115.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 100, \sigma = 15

The proportion of IQ scores less than 115 is the <u>p-value of Z when X = 115</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = \frac{115 - 100}{15}

Z = 1

Z = 1 has a p-value of 0.8413.

Out of 2200 people:

0.8413 x 2200 = 1851.

More can be learned about the normal distribution at brainly.com/question/27643290

#SPJ1

5 0
1 year ago
There are 17 trees along the road from Basil's home to a swimming pool. On his way way to and from a swim Basil marks some trees
morpeh [17]

Answer:

Number of trees not marked is 6

Step-by-step explanation:

Base on the scenario been described in the question, we can find the solution in the file attached

4 0
3 years ago
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