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Vsevolod [243]
4 years ago
5

Janelle plotted her room on a coordinate plane where each space represents 1 foot. Its end points are A(-6, 5), B(-6, -5), C(4,-

5),
and D(4, 5). What best describes the shape of her room?
OA. rectangle
OB. trapezoid
OC. triangle
OD. square
Reset
Submit
Mathematics
1 answer:
bija089 [108]4 years ago
5 0

Answer:

square

Step-by-step explanation:

x values are -6 and 4, so their distance is 10 units.

y values are -5 and 5, so their distance is also 10 units.

4 lines with equal length creates a square.

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Element X decays radioactively with a half life of 15 minutes. If there are 960 grams of Element X, how long, to the nearest ten
labwork [276]

An equation is formed of two equal expressions. It will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The radioactive decay of an element is given by the formula,

N = N_0 \cdot e^{-\lambda t}

Given the half-life of the element is 15 minutes, therefore, we can write,

\dfrac12 =  e^{-\lambda\times 15}\\\\\ln (0.5) = -\lambda\times 15\\\\\lambda = 0.0462

Now, the time it will take for 960 grams to decay to 295 grams is,

295 = 960 \cdot e^{-0.0462 \times t}\\\\\ln (\dfrac{295}{960}) = -0.0462 \times t\\\\t = 25.54\rm\ minutes

Hence, it will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.

Learn more about Equation:

brainly.com/question/2263981

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8 0
2 years ago
#3 I set the problem up , but keeping getting decimals
julsineya [31]
You can just subtract the two points. Y2-y1 (3-2) will give you the distance 1 between the y's. And x2-x1 (-2-4) will give you 6 as the distance between the x's.
3 0
4 years ago
9 (y+2) -5 (y-6) = -4y -9 solve for y
nydimaria [60]

9y+18-5y+30=-4y-9 \\8y+57=0 \\y=-\frac{57}{8}=-7.125 \\

Hope this helps.

8 0
4 years ago
Read 2 more answers
How will this be writen seven less than the quotient of nineteen and a number
maxonik [38]

19/n - 7 or (19/n) - 7

6 0
3 years ago
Read 2 more answers
I need a Answer Please 3(4+ -9) -2​
aleksley [76]

Answer:

-17

Step-by-step explanation:

Expand to get 12-27-2=-17

5 0
4 years ago
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