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laila [671]
3 years ago
6

How do you do expressions in maths

Mathematics
1 answer:
daser333 [38]3 years ago
8 0
1. Know order of operations (bedmas, Canada), (pemdas, USA)
Brackets
Exponents
Division
Multiplication
Addition
Subtraction

Or

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction.

Multiplication and division are from left to right so whichever comes first is the one u solve first. Same with subtraction and addition
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How can I turn -4/slope ,0/y-intercept into a slope intercept form equation
Rainbow [258]

Answer:

y = - 4x

Step-by-step explanation:

Here, it is given that the slope of a line is - 4 and the y-intercept is 0.

Now, if the slope of a straight line is m and the y-axis intercept is c, the by slope-intercept form the equation of the straight line is given as  

y = mx + c ......... (1)

Therefore, in our case m = - 4 and c = 0 and using equation (1), the equation of the given straight line is  

y = - 4x (Answer)

4 0
3 years ago
Plot the following points and find the area of the figure: (3,5); (-1,5); (-1,-3); (3,-3)
Westkost [7]

Answer:

im sorry i cant help you without a picture

Step-by-step explanation:

5 0
3 years ago
A $25,000 purchase decreases 12% in value per year. Determine the values of the purchase after 3 years and after 7 years.
choli [55]
Use Socratic or slider
4 0
3 years ago
Read 2 more answers
I need help on number two
SVEN [57.7K]

Answer:

2 y = 100

10 y = 20

20 y = 10

Step-by-step explanation:

To find the answer divide Y by X since y is 200 in the first and x is 1 divide 200 by the second one and you will find you answer.

8 0
3 years ago
A research study investigated differences between male and female students. Based on the study results, we can assume the popula
garri49 [273]

Using the <u>normal distribution and the central limit theorem</u>, it is found that the interval that contains 99.44% of the sample means for male students is (3.4, 3.6).

In a normal distribution with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

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

  • It measures how many standard deviations the measure is from the mean.  
  • After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

In this problem:

  • The mean is of \mu = 3.5.
  • The standard deviation is of \sigma = 0.5.
  • Sample of 100, hence n = 100, s = \frac{0.5}{\sqrt{100}} = 0.05

The interval that contains 95.44% of the sample means for male students is <u>between Z = -2 and Z = 2</u>, as the subtraction of their p-values is 0.9544, hence:

Z = -2:

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

By the Central Limit Theorem

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

-2 = \frac{X - 3.5}{0.05}

X - 3.5 = -0.1

X = 3.4

Z = 2:

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

2 = \frac{X - 3.5}{0.05}

X - 3.5 = 0.1

X = 3.6

The interval that contains 99.44% of the sample means for male students is (3.4, 3.6).

You can learn more about the <u>normal distribution and the central limit theorem</u> at brainly.com/question/24663213

7 0
2 years ago
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