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Vikentia [17]
3 years ago
6

Pls do 2-4, no fake answers to get points i will give brainliest

Mathematics
2 answers:
Talja [164]3 years ago
8 0
Answer: -2.

Here’s how you solve questions like these:

First of all, you have to learn the rule on the number line.

if it’s an addition problem, go forward.

if it’s a subtraction problem, go backwards.

if the number is positive, turn to the right.

if the number is negative, turn to the left.

So pretend you’re in between a number line that goes from -10 to 10, or on 0.

< -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 >

Take the first number and look at the rule. Since 2 is positive, you start at that number and face to the right.

< -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 >
>
Next, you take the symbol in between the two numbers. Since it’s the minus sign, or a subtraction problem, you have to get ready to walk backwards But before you do that, check the last number. Since 4 is positive, you still have to face to the right and move 4 spaces backwards.

< -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 >
< < < <

If this is confusing, I’ll demonstrate it in the comments again.
klemol [59]3 years ago
7 0
-2 pretty sure hope this helps
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If a x b express 12x(10x5)in simplest form
Mrac [35]
That's easy but I'll give the answer is 600
5 0
3 years ago
Help it’s not 1,134 will give brainly
Masja [62]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Simplify.<br><br> 2x5 - 6x2 + 4x4y<br> -------------------------<br> 2x
Ede4ka [16]
We have the rational expression \frac{2x^{5}-6x^{2}+4x4y}{2x}; to simplify it, we are going to try to find a common factor in the numerator, and, if we are luckily, that common factor will get rid of the denominator 2x.
Notice that in the denominator all the numbers are divisible by two, so 2 is part of our common factor; also, all the terms have the variable x, and the least exponent of that variable is 1, so x will be the other part of our common factor. Lets put the two parts of our common factor together to get 2x.
Now that we have our common factor, we can rewrite our numerator as follows:
\frac{2x(x^{5}-6x+2(2y)}{2x}
We are luckily, we have 2x in both numerator and denominator, so we can cancel those out:
x^{5}-6x+2(2y)
x^5-6x+4y

We can conclude that the simplified version of our rational function is x^{5}-6x+4y.
4 0
3 years ago
Ignoring those who said they weren't sure, there were 297 men asked, and 183 said yes, they had driven a car when they probably
USPshnik [31]

Answer:

z=\frac{0.616-0.5}{\sqrt{\frac{0.5(1-0.5)}{297}}}=3.998  

p_v =2*P(z>3.998)=0.0000639  

With the most common significance levels used \alpha= 0.1, 0.05, 0.01 we see that the p value is lower than the significance level so then we have enough evidence to reject the null hypothesis and we can say that the true proportion is significantly higher than 0.5

Step-by-step explanation:

Information given  

n=297 represent the random sample of male taken

X=183 represent the  men who said yes, they had driven a car when they probably had too much alcohol

\hat p=\frac{183}{297}=0.616 estimated proportion of men who said yes, they had driven a car when they probably had too much alcohol

p_o=0.5 is the value that we want to test

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Hypothesis to test

We need to conduct a hypothesis in order to test the claim that the majority of men in the population (that is, more than half) would say that they had driven a car when they probably had too much alcohol, and the system of hypothesis are:  

Null hypothesis:p\leq 0.5  

Alternative hypothesis:p > 0.5  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

After replace we got:

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.616-0.5}{\sqrt{\frac{0.5(1-0.5)}{297}}}=3.998  

Decision

We have a right tailed test so then the p value would be:  

p_v =2*P(z>3.998)=0.0000639  

With the most common significance levels used \alpha= 0.1, 0.05, 0.01 we see that the p value is lower than the significance level so then we have enough evidence to reject the null hypothesis and we can say that the true proportion is significantly higher than 0.5

7 0
3 years ago
-1 + 14x = 12x + 17 Whats the answer ? what is x
Finger [1]

Answer:

x= 9

Step-by-step explanation:

Move the terms -> -1=14x = -12x + 16

Find out the sum -> 2x=17+1

Divide both by the equation by two -> 2x=18 x=9

Final answer: x=9

8 0
3 years ago
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