3 years ago

Help with number 13 please if someone can please

Mathematics

1 answer:

guapka [62]3 years ago

6 0

Answer: X=2 Y=-6

Step-by-step explanation:

You might be interested in

Simplify \frac{4(3x^{2}y^{4})^{3}}{(2x^{3}y^{5})^{4}} <br> Show your work.

irina1246 [14]

$\frac{4(3x^{2}y^{4})^{3}}{(2x^{3}y^{5})^{4}} = \frac{4* ( 3^{3} x^{6} y^{12}) }{2^4 x^{12} y^{20}} = \frac{108}{16x^{6} y^{8} } = \frac{27}{4 x^{6} y^{8} }$

4 0

3 years ago

How to divide 33 into 2 and make the ratio 4 to 7

Igoryamba

4x + 7x = 33
11x = 33
x = 3

4x = 4(3) = 12
7x = 7(3) = 21

12 and 21 are how you split 33 in to a ratio of 4 to 7.

7 0

4 years ago

Eighteen is 20 percent of what number? Draw the diagram.

Shtirlitz [24]

Answer:

Step-by-step explanation:

20 percent (calculated percentage %) of what number equals 18? Answer: 90.

5 0

3 years ago

Read 2 more answers

When testing a hypothesis about a single mean, if the sample size is 51 and the population standard deviation is known, the corr

choli [55]

Answer:

z-statistic

Step-by-step explanation:

We have to identify the correct test statistic to use with the given conditions.

If the sample size is larger than 30, then the sample is considered to be large.
We are given a sample size of 51, which is a a large sample.
Also, the population standard deviation is known.
Thus, we use the z-statistic when testing a hypothesis about a single mean.
Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

where $\bar{x}$ is the sample mean, $\mu$ is the population mean, $\sigma$ is the population standard deviation and n is the sample size.

6 0

3 years ago

Mrs. Chen paid $19.60 for 3.5 pounds of turkey at the deli. Which is the cost per pound?

NeTakaya

You have to divide $19.60 by 3.5 to find the cost of each pound of turkey.
19.60/3.5= $5.60

6 0

3 years ago