All categories

3 years ago

What is the solution of the system?

Mathematics

2 answers:

Phoenix [80]3 years ago

5 0

Answer:

(-2, 6)

Step-by-step explanation:

We can simply do this by plugging in all of the coordinates. (I did this in my head quickly, so I know what it is; I'm just going to plug in the correct answer.) The correct answer is (-2, 6), so we're just going to plug them into the simplest equation, which is probably y=-3x. So...

6=-3(-2)

6=6

This answer is correct. If you're unsure about the answer, you can always check in the other equation. So...

3(-2)+2(6)=6

-6+12=6

6=6

Hope this helps and have an amazing day ^^

zubka84 [21]3 years ago

5 0

Answer:
(-2,6)

I hope this helps :)

You might be interested in

In the diagram of <br> △△NRQ below, SP∥∥RQ, NS=10, SR=50, and PQ=40. What is the length of NQ?

Delicious77 [7]

Answer:

Step-by-step explanation:

3 0

3 years ago

Each day 1/2 of the money that is in bank value is removed. No money is added to the value. Which of the following represent the

Alchen [17]

Answer:

Option C. exponential decay function

Step-by-step explanation:

In this problem we have a exponential function of the form

$y=a(b^x)$

where

y ---> is the money that is in the bank

x ----> number of days

a ---> is the initial value or y-intercept

b is the base of the exponential function

r ---> is the rate of change

b=(1+r)

In this problem we have that

Each day 1/2 of the money that is in bank value is removed

$r=-50\%=-50/100=-0.50$ ---> is negative because is a decreasing function

The value of b is equal to

$b=1-r=1-0.50=0.50$

$y=a(0.50^x)$

The value of b is less than 1

b<1

That means -----> Is a exponential decay function

3 0

3 years ago

David has been tasked with tracking the number of bagels sold (y) at freddy's 24-hour bagel shop from 12: 00 am (*= 0) to 12: 00

mafiozo [28]

Answer:

53 bagels

Step-by-step explanation:

The number of bagels, y sold is a function of the square of the time (x) plus 4.

Therefore:

$y=x^2+4$

Number of Hours from 12.00 am to 7:00 am =7

At x=7

The number of bagels sold,

$y=7^2+4\\=49+4\\=53\\$

The bagel shop sold 53 bagels from 12: 00 am to 7: 00 am.

7 0

3 years ago

What's is the answer

Anna71 [15]

The answer is #2 you’re welcome

5 0

2 years ago

My brother wants to estimate the proportion of Canadians who own their house.What sample size should be obtained if he wants the

AVprozaik [17]

Answer:

a) $n=\frac{0.675(1-0.675)}{(\frac{0.02}{1.64})^2}=1475.07$

And rounded up we have that n=1476

b) $n=\frac{0.5(1-0.5)}{(\frac{0.02}{1.64})^2}=1681$

And rounded up we have that n=1681

Step-by-step explanation:

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".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

If solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

Part a

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.9=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by: