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3 years ago

X+y=0.5 x-y=1 elimination meathod

Mathematics

1 answer:

user100 [1]3 years ago

8 0

Answer:

$x=0.75, y=-0.25$

Step-by-step explanation:

We can add the two equations to eliminate $y$ and solve for $x$ .

$x+y+x-y=0.5+1$

$2x=1.5$

$x=0.75$

Now, we can find for $y$ by using substitution:

$x+y=0.5$ (given)

$0.75+y=0.5$

$y=-0.25$

Hope this helps :)

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4 years ago

Circle O has a circumference of approximately 2501 ft.

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For this case we have that by definition, the circumference of a circle is given by:

$C = \pi * d$

Where:

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According to the data we have to:

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Answer:

Option B

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3 years ago

Read 2 more answers

Andrew is about to leave for school. If he walks at a speed of 50 meters per minute, he will arrive 3 minutes after the bell rin

Mariana [72]

Answer:

The answer is: 13 minutes

Step-by-step explanation:

First Let us form equations with the statements in the two scenario

$time=\frac{distance}{speed}$

Let the time in which the bell rings be 'x'

1. If Andrew walks (50 meters/minute), he arrives 3 minutes after the bell rings. Therefore the time of arrival at this speed = (3 + x) minutes

$3 + x =\frac{distance}{50}\\distance = 50(3+x) - - - - - (1)$

2. If Andrew runs (80 meters/minute), he arrives 3 minutes before the bell rings. Therefore the time taken to travel the distance = (x - 3) minutes

$x - 3 = \frac{distance}{80} \\distance = 80(x-3) - - - - - (2)$

In both cases, the same distance is travelled, therefore, equation (1) = equation (2)

$50(3+x)=80(x-3)$

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Next, collecting like terms:

$150 + 240 = 80x - 50x\\390 = 30x\\30x = 390\\$

dividing both sides by 3:

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3 years ago

A company makes a profit of $50 per software program and $35 per video game. The company can produce at most 200 software progra

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Answer:

Let x = software program

Let y = video game

x < 200 ; y < 300

x + y < 425

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x = 200 ; y = 225

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Step-by-step explanation:

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