What is the result of adding these two equations? 4x – 4y = -2 –9x

Please help, will give 10 points.

enot [183]

Answer:

length is 770 width is 410

Step-by-step explanation:

6 0

2 years ago

Surface area of a cylinder with binomials

baherus [9]

Dhhdhfuf a fbxxfgdt in srj c a flat tents

6 0

3 years ago

a normal distribution with a mean of 25 minutes with a population standard deviation of 5 minutes. The store manager sampled 100

sergiy2304 [10]

Answer:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

For this case since the p value is higher than the significance level of 0.01 we have enough evidence to fail to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is significantly less than 25 min.

Step-by-step explanation:

Information given

$\bar X=242.5$ represent the sample mean

$\sigma=5$ represent the population deviation

$n=100$ sample size

$\mu_o =25$ represent the value to check

$\alpha=0.01$ represent the significance level

z would represent the statistic

$p_v$ represent the p value

Hypotheis to test

We want to verify if the true mean is less than 25 min, the system of hypothesis would be:

Null hypothesis: $\mu \geq 25$

Alternative hypothesis: $\mu < 25$

The statistic would be given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

And replacing the info given we got:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

For this case since the p value is higher than the significance level of 0.01 we have enough evidence to fail to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is significantly less than 25 min.

4 0

3 years ago

Solve 5x/3 + 2/5 = 1 x = 9/25 x= 25/9 x= 3/25 x = 9/27

musickatia [10]

Answer:

$x=\frac{9}{25}$

x = 0.36

Step-by-step explanation:

5x/3 + 2/5 = 1

5x/3 + 2/5 - 2/5 = 1 - 2/5

$\frac{5x}{3} = 0.6$

5x/3 × 3 = 0.6 × 3

5x = 1.8

5x ÷ 5 = 1.8 ÷ 5

$x=\frac{9}{25}$

x = 0.36

8 0

2 years ago

Sara and logan were selling water bottles to raise money for new comic books sara sold 6 comic books for every 4 logan sold sara

aleksley [76]

Answer:

Simple, he sold 160 water bottles

Step-by-step explanation:

240 divided by 6= 40

40 times 4 is 160

4 0

3 years ago

What is the result of adding these two equations? 4x – 4y = -2 –9x – 4y = -3