Which values from the set (-6,-4,-2,0,2,4,6) Satisfy this inequality? 3+1/2x>4

I Forgot how to do substitution and elimination im in Algerbra 1

NISA [10]

Answer:

Can you give me an example problem to solve and I can give you step by step?

Step-by-step explanation:

6 0

3 years ago

The length of a rectangle is five times its width.

Marizza181 [45]

ANSWER

96 yd

EXPLANATION

Let the width of the rectangle be w, then, the length of the rectangle will be:

$l = 5w$

The area of a rectangle is calculated using the formula:

$Area=l \times w$

$Area=5w \times w$

$Area=5 {w}^{2}$

It was given that, the area of the rectangle is 320yd²

$320=5 {w}^{2}$

Divide both sides by 5.

$64 = {w}^{2}$

Take square root of both sides to get:

$w = 8yd$

This means the length is

$l = 5 \times 8 = 40yd$

The perimeter of a rectangle is given by:

P=2(w+l)

We plug in the values to get:

$P=2(40 + 8) = 2 \times 48 = 96yd$

The perimeter is 96yd

5 0

3 years ago

Hi, help:/ Thank you

erma4kov [3.2K]

Answer:

its the first on 5,3 can you give me brainliest

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

I dont know the answers to this question please tell me the x and y

Eddi Din [679]

Answer:

x = -5
y = 5

Step-by-step explanation:

=> -7x - 2y = 25

-4x - 9y = -25

=> 4(-7x - 2y = 25)

7(-4x - 9y = -25)

=> -28x - 8y = 100

-28x - 63y = -175

=> 55y = 275
=> y = 5

Now, let's substitute the value of y into the first equation.

=> -7x - 2y = 25
=> -7x - 2(5) = 25
=> -7x - 10 = 25
=> -7x = 35
=> x = -5

Now, let's check our answer to make sure our answer is correct.

Check:

-4x - 9y = -25
=> -4(-5) - 9(5) = -25
=> 20 - 45 = -25
=> -25 = -25

Hence, this is proved correct.

Hoped this helped.

$BrainiacUser1357$

3 0

2 years ago

Suppose the weights of tight ends in a football league are normally distributed such that σ2=400. A sample of 11 tight ends was

AlladinOne [14]

Answer:

$217.636-1.96\frac{20}{\sqrt{11}}=205.817$

$217.636+1.96\frac{20}{\sqrt{11}}=229.455$

So on this case the 95% confidence interval would be given by (205.82;229.46)

Step-by-step explanation:

Assuming the following data: Weight 150 169 170 196 200 218 219 262 269 270 271

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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

$\mu$ population mean (variable of interest)

$\sigma= \sqrt{400}= 20$ represent the population standard deviation

n=11 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

In order to calculate the mean we can use the following formula:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

The mean calculated for this case is $\bar X=217.636$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$

Now we have everything in order to replace into formula (1):

$217.636-1.96\frac{20}{\sqrt{11}}=205.817$

$217.636+1.96\frac{20}{\sqrt{11}}=229.455$

So on this case the 95% confidence interval would be given by (205.82;229.46)

8 0

4 years ago