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3 years ago

What is the solution of the system of equations? {7/2x−1/2y=9/23x−y=5 Enter your answer in the boxes. ( _ , _ )

Mathematics

2 answers:

In-s [12.5K]3 years ago

6 0

I think the answer is (1,-2)

dimulka [17.4K]3 years ago

5 0

Answer:

(1, -2)

Step-by-step explanation:

I hope that helps :/

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A principle of $20,000 is invested at $6.25 and earns $10,000 simple interest how many years has the money been invested

slava [35]

Answer:

The money was invested for 8 years.

Step-by-step explanation:

Given that a principal of $ 20,000 is invested at 6.25% and earns $ 10,000 simple interest, to determine how many years has the money been invested, the following calculation has to be performed:

(20,000 x 0.0625) x X = 10,000

1,250X = 10,000

X = 10,000 / 1,250

X = 8

Thus, the money was invested for 8 years.

6 0

3 years ago

Please Help, will give brainliest !!!

tankabanditka [31]

I hope it can help you hehe

3 0

3 years ago

Find cos 0.<br> 53<br> 45<br> 28

Lemur [1.5K]

The answer is A. 28/53

4 0

3 years ago

A random sample of n = 8 E-glass fiber test specimens of a certain type yielded a sample mean interfacial shear yield stress of

ANTONII [103]

Answer:

$32.9-2.365\frac{4.9}{\sqrt{8}}=28.80$

$32.9+2.365\frac{4.9}{\sqrt{8}}=37.00$

Step-by-step explanation:

Information given

$\bar X=32.9$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=4.9 represent the sample standard deviation

n=8 represent the sample size

Confidence interval

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

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

the degrees of freedom are given by:

$df=n-1=8-1=7$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and the critical value for this cae would be $t_{\alpha/2}=2.365$

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

$32.9-2.365\frac{4.9}{\sqrt{8}}=28.80$

$32.9+2.365\frac{4.9}{\sqrt{8}}=37.00$

6 0

3 years ago

Carl is on the school track team. To prepare for an upcoming race, he plans to run 207 miles total over the next 31 days. Write

Mkey [24]

207 divide 31 = 6.7 miles per day
y= days
x= distance
y=6.7

8 0

3 years ago