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2 years ago

1/2x-1/4y=10

Mathematics

1 answer:

vovikov84 [41]2 years ago

6 0

Answer: (-112,-264)

Step-by-step explanation:

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Y=-x <br>y=-7x<br><br>solve system of equations algebraically <br>

snow_lady [41]

Answer:

(x,y) = (0,0)

Step-by-step explanation:

Let both as equation (1) and (2)

put equal both sides -x = -7x

-x + 7x = 0

6x = 0

x = 0

put it in 2nd equation

y = -7(0)

y = 0

5 0

3 years ago

4. A statistician working for the National Basketball Association supplies the television announcers with interesting statistics

Sonbull [250]

Answer: 0.038

Step-by-step explanation:

Given: Total games : n= 375

Number of games won by the team that was winning the game at the end of the third quarter. = 300

The proportion (p) of the team that was winning the game at the end of the third quarter: $p=\dfrac{300}{375}=0.8$

Critical z-value for 90% confidence: z* = 1.645

Margin of error = $z^*\sqrt{\dfrac{(1-p)p}{n}}$

The margin of error in a 90% confidence interval estimate of p $=1.645\sqrt{\dfrac{0.2\times0.8}{300}}\\= 1.645\times\sqrt{0.00053333}\\\\=1.645\times0.0231\\\\=0.0379995\approx$$0.038$

Hence, the required margin of error = 0.038

7 0

3 years ago

Find the hypotenuse, , of the triangle

Irina18 [472]

Answer:

hypoténuse = 15 in

b ² = 15² - 9²

b ² = 144

b = √144 = 12

Perimeter = 15 + 9 + 12 = 36 inches

Step-by-step explanation:

5 0

2 years ago

Tax returns filed manually have a 20% chance of containing errors, while tax returns filed electronically have a 0.05% chance of

suter [353]

Answer:

B) 538, 650

Step-by-step explanation:

Given:

Errors on tax returns filed manually = 20%

Errors on tax returns filed electronically = 0.05%

Tax return filled in each way = 2.7 million

Manual filing:

2,700,000 x 20% = 2,700,000*0.2 = 540,000

Electronic filing:

2,700,000 x 0.05% = 2, 700,000*0.0005 = 1,350

Error difference = 540,000 - 1,350 = 538,650

There will be 538,650 more erroneous tax returns filed manually than there are filed electronically.

Thank you.

3 0

3 years ago

Read 2 more answers

Part A

natulia [17]

Answer:

To find the measure of an interior angle of a regular polygon, take the sum of all interior angles and divide by the number of angles. The sum of all interior angles can be found by (n - 2)*180 where n is the number of sides, in this case 24. So all the interior angles add to 3960 degrees.

PLEASE SAID THANKS

7 0

2 years ago