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USPshnik [31]
3 years ago
9

Building A is 255 meters taller than building B. If the height of building A is subtracted from twice the height of building B,

the result is 234 meters. How tall is each
skyscraper?
Mathematics
1 answer:
garri49 [273]3 years ago
8 0

Answer:

A = 744 meters    B = 489 meters

Step-by-step explanation:

A = B + 255

2B - A = 234

-2B          -2B         Subract the -2B from both sides

-A = -2B + 234

A = 2B - 234          Divide by -1 to get A alone

B + 255 =  2B - 234   Set both equations equal to each other

- B              -B

255 = B - 234

+234      +234

489 = B

Plug 234 in for B in the original equations

A = 489 + 255

A = 744

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<h2>Answer:</h2>

First, we must determine <u><em>b</em></u> using <u><em>slope-intercept form*</em></u>, the given point, and the given slope.

-4 = -\frac{1}{3}(-9) + b\\\\-4 = -3 + b\\\\-1 = b

Second, we need to set up the equation of the line in slope-intercept form.

y = -\frac{1}{3}x - 1

Third, we convert the above equation to <em>STANDARD FORM**</em>.

y = -\frac{1}{3}x - 1\\\\\frac{1}{3}x + y = -1

We now have our equation: \frac{1}{3}x - y = -1

*Slope-intercept form: <em>y = mx + b</em>

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3 years ago
Sarah spends a total of $60. Based on the information in the table, how many people attended the craft demonstration?
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x = number of business cards printed
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I need help on these please I really need help.<br> It's tomorrow.
alekssr [168]
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30/5=6. The mean is 6

Median: arrange the numbers in order from least to greatest (counting order). If there is more than one of any number make sure to put them all together. Then find the number in the middle. That's the median. If there isn't one number in the middle, take the two 'middle' numbers, add them together and divide by 2. That will be the median
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Mode: what number shows up the most often? Sometimes there might not be a mode if there are no repeated values.
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Sorry I can't be more specific, it's difficult to read the graphs and charts
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