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3 years ago

5

The width of a rectangle is the length minus 4 units. The area of the rectangle is 21 units. What is the width, in units, of the

rectangle?

1 answer:

beks73 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

$W=L-4\\ \\ L=W+4\\ \\ A=LW\\ \\ A=(W+4)W\\ \\ A=W^2+4W\\ \\ A=21\\ \\ W^2+4W=21\\ \\ W^2+4W-21=0\\ \\ (W+7)(W-3)=0\\ \\ W>0\\ \\ W=3u$

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irakobra [83]

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3 years ago

5x-3y=1,3x+2y=1 solve the simultaneous equation above

ryzh [129]

Answer:

The solution to the equation is as follows;

$x = \frac{5}{19} ,\ and \ y= \frac{2}{19}$

Step-by-step explanation:

Given;

5x - 3y = 1

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Solving both equation simultaneously;

2: 10x - 6y = 2

3: 9x + 6y = 3

--------------------------

19x + 0 = 5

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substitute the value of x in any of the equations above and solve for y;

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3 years ago

There are blue, red and yellow marbles in a bag. The probability of choosing a blue marble is 1/8, and the probability of choosi

erma4kov [3.2K]

Answer:

3/8

Step-by-step explanation:

1/8 of the bag is blue, 1/2 is red add that and you get 5/8 then subtract 8/8 with 5/8 and that gives you 3/8.

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3 years ago

Read 2 more answers

Please answer the question in the picture.

WARRIOR [948]

Answer:

The missing number is 49

Step-by-step explanation:

we know that

<em>In the first row</em>

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<em>In the second row</em>

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<em>In the third row</em>

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therefore

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3 years ago

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Step-by-step explanation:

If you take any number in the sequence then subtract it by the previous one, and the result is always the same or constant then it is an arithmetic sequence.

d=-7+3=-3-1=1-5=-4

so it is an arithmetic sequence

hope it helps

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3 years ago