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2 years ago

Simplify -4+6/2= wjjjj

Mathematics

2 answers:

Margarita [4]2 years ago

4 0

Answer:

good luck broooooooooooo

faltersainse [42]2 years ago

4 0

Answer:

-1

Step-by-step explanation:

→ -4 + (6/2)

→ -4 +3 = -1

So, the answer is -1.

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Write an equation of the line below.

svp [43]

Answer: y = -2/5x + 3

Step-by-step explanation:

The formula for a line is: y = mx + b.

m is the slope of the line. We calculate this by looking at how many units the line travels vertically over how many units the line travels horizontally, or rise over run. In this example, we can see that the line goes down 2 units for every 5 it goes to the right, meaning the slope is equal to -2/5.

b is the y-intercept, or where the line crosses the y-axis. In this example, the line crosses the y-axis at (0, 3) making the b value equal to 3.

Therefore, the equation for this line put together is y = -2/5x + 3.

5 0

2 years ago

Factor out the greatest common factor of Given the expression: 4x^10 − 64x^2

Alexxandr [17]

Part A

4x10 – 64x2

= 4x2 * x8 – 4x2 * 16

= 4x2 * (x8 – 16) by distributive property

Part B

x8 is (x4)2 and 16 = 42 so a difference of squares is seen in the parentheses. The pattern a2 – b2 = (a + b)(a – b) can be used.

4x2 * (x8 – 16)

= 4x2 * (x4 + 4) * (x4 – 4)

x4 = (x2)2 and 4 = 22 so there is another difference of squares in the last factor. Use the pattern again.

= 4x2 * (x4 + 4) * (x2 + 2) * (x2 – 2)

5 0

3 years ago

Read 2 more answers

How many people drink 7 or more glasses of water each day?

STALIN [3.7K]

The answer is D because it asked 7 or more

7 0

3 years ago

Read 2 more answers

It is said that sufferers of a cold virus experience symptoms for 7 days. However, the amount of time is actually a normally dis

AlexFokin [52]

Answer:

a) 0.18% of cold sufferers experience fewer than 4 days of symptoms

b) 64.40% of cold sufferers experience symptoms for between 7 and 10 days.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

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

The Z-score 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. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 7.5, \sigma = 1.2$

a. What proportion of cold sufferers experience fewer than 4 days of symptoms?

This is the pvalue of Z when X = 4. So

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

$Z = \frac{4 - 7.5}{1.2}$

$Z = -2.92$

$Z = -2.92$ has a pvalue of 0.0018.

So 0.18% of cold sufferers experience fewer than 4 days of symptoms.

b. What proportion of cold sufferers experience symptoms for between 7 and 10 days?

This is the pvalue of Z when X = 10 subtracted by the pvalue of Z when X = 7. So

X = 10

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

$Z = \frac{10 - 7.5}{1.2}$

$Z = 2.08$

$Z = 2.08$ has a pvalue of 0.9812.

X = 7

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

$Z = \frac{7 - 7.5}{1.2}$

$Z = -0.42$

$Z = -0.42$ has a pvalue of 0.3372.

So 0.9812 - 0.3372 = 0.644 = 64.40% of cold sufferers experience symptoms for between 7 and 10 days.

8 0

4 years ago

Ok this isnt a math question but i still need an answer y when i go on this website WHY wont it just give me the answer after i

vredina [299]

I'd help you but you'd probably sue me too.
Fun fact: You can't just sue people for petty reasons like this. You will end up having to pay court costs, costs to the party your suing for their time, and likely be in contempt of court which is punishable by anything from a warning to jail time. Try again asking nicely and maybe someone will help you.

4 0

3 years ago