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3 years ago

13

a first number is 6 more than a second number. the first number multiplied by 2 is 8 more than the second number. what are the t

wo numbers? PLS HURRY

1 answer:

Andreas93 [3]3 years ago

4 0

Answer:

-2 (negative 2)

Step-by-step explanation:

8÷2 =4

4-6 = -2

hope this helps

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Write (x^2) ^4without exponents

kompoz [17]

Answer:

$x * x + x * x * x * x = y$

The formula for finding exponents is multiply the number following the exponent by itself that number of times.

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3 years ago

The inequality, |x−35|≤6, describes the the range of typing speeds by Ms. Fletcher's students. Find the range of typing speeds f

Natalija [7]

$\text{The given inequality is } |x−35|≤6$

This can be solved as below

$|x-35|\leq6 \\ \\ \text{There two possible cases from here}\\ \text{Case-1}\\ \\ x-35\le \:6\\ \\ x-35+35\le \:6+35\\ \\ x\le \:41\\ \\ \text{Case-2}\\ \\ x-35\ge \:-6\\ \\ x-35+35\ge \:-6+35\\ \\ x\ge \:29\\ \\ \text{Hence the required range of solution is}\\ \\ 29\le \:x\le \:41$

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4 years ago

Help I don't understand this math. Whoever gets the right answer gets Brainlist! :)

Lera25 [3.4K]

Answer:

1) y=x-4

2)y=x+2

Step-by-step explanation:

You can see on the first one y is just 4 less than x

You can see that the second one (graph) has a slope. As by the points, if you increase x by 0.5 you increase y by one.

Thus, y=x+2

Hope this helped! I can't see much of the question :)

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2 years ago

Terri graphed a system of linear inequalities. Which ordered pairs are a part of the solution set for this system of linear ineq

Oduvanchick [21]

Answer: (2, -4) and (7, -1)

Step-by-step explanation:

Ok, the solutions of the system of inequalities are all the points that lie on the blue shaded part of the graph or in the solid line.

So, in order to see if the points are solutions of the system, then you need to locate the point in the graph and see if it is inside the shaded region or in the solid line (only in the segment that "touches" the shaded region).

Now, we want to find the equation of the solid line, we can see that it passes through the points (0, 6) and (6, 0)

A linear relationship can be written as:

y = a*x + b

where a is the slope and b is the y-axis intercept.

For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:

a = (y2 - y1)/(x2 - x1).

Then, in this case, the slope is:

a = (0 - 6)/(6 - 0) = -1.

And to find the value of b, we have that when x = 0, y = 6.

y = 6 = -1*0 + b

6 = b

The equation is:

y = -1*x + 6

(-1, 5) is not in the blue region nor in the solid line, so this is not a solution.

(7, - 1) this point is near the solid line, let's test it:

y(7) = -1*7 + 6 = -1

So the point (7, -1) is on the solid line, and is the other solution of the system.

8 0

4 years ago

A marketing researcher wants to find a 96% confidence interval for the mean amount those visitors spend per person per day while

ki77a [65]

Answer:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=12$ represent the population standard deviation

n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

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4 years ago