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3 years ago

Which event below is

Mathematics

1 answer:

Rasek [7]3 years ago

7 0

Answer:

yeah I think it is A thank me later

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What is the solution to the system of equations? 5x – 4y = -2 2x + 4y = 16

Vesnalui [34]

Answer:

x = 2, y = 3

Step-by-step explanation:

5x – 4y = -2

2x + 4y = 16

Solve by elimination. (-4y and +4y gives 0)

7x = 14

x = 2

Substitute 2 in one of the equations in order to find y.

5(2) - 4y = -2

10 - 4y = -2

-4y = -12

y = 3

x = 2, y = 3

hope this helps!! p.s. i really need brainliest :)

5 0

2 years ago

Read 2 more answers

A 98% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina

BaLLatris [955]

Answer:

$n = (\frac{2.326*1.7}{0.3})^2= 173.73$

And the value for n rounded up would be n = 174

Step-by-step explanation:

We have the following info given:

$s= 1.7$ previous estimation for the deviation

$ME=0.03$ the margin of error desired

$Conf =0.98$ represent the confidence

The Margin of error is given by:

$ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

If we solve for the value of n we got:

$n= (\frac{z*\sigma}{ME})^2$

For this problem we know that the confidence is 98% so then the significance level would be $\alpha=0.02$ and the critical value would be:

$z_{\alpha/2}= 2.326$

And replacing we got:

$n = (\frac{2.326*1.7}{0.3})^2= 173.73$

And the value for n rounded up would be n = 174

3 0

3 years ago

I will give a brainliest if your answer are correct

Andrew [12]

Answer:

huhh what this is question is too hard

4 0

3 years ago

Read 2 more answers

Abdul bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $150 more than the desktop. He pa

slavikrds [6]

Answer:

The cost of desktop before finance charge was $1750.

The cost of laptop before finance charge was $1900.

Step-by-step explanation:

Let us assume this is a simple interest scenario.

Let D be the cost of desktop

Let L be the cost of laptop

Given- the laptop cost $150 more than the desktop.

So, $L=D+150$

The total finance charge for 1 year is given by :

$0.07D+0.095L =303$

Substituting the value of L here, we get;

$0.07D+0.095(D+150) =303$

=> $0.07D+0.095D+14.25 =303$

=> $0.165D+14.25 =303$

=> $0.165D=303-14.25$

=> $0.165D=288.75$

D = $1750

As $L=D+150$

So, $L=1750+150=1900$

L = $1900

We can check this :

$0.07(1750)+0.095(1900) =303$

=> $122.50+180.50=303$

=> $303=303$

So, the cost of desktop before finance charge was $1750.

The cost of laptop before finance charge was $1900.

3 0

4 years ago

Help out a real dude

Verdich [7]

59.70 for 6 hours of mowing and 1 hour of babysitting !

7 0

3 years ago

Read 2 more answers