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WARRIOR [948]
4 years ago
12

PLZ help super super fast

Mathematics
1 answer:
Komok [63]4 years ago
3 0

Answer:

it's E

Step-by-step explanation:

(5x+y)²

You expand the bracket

it gives;

(5x + y)(5x+y)

Now, multiply 5x by 5x=25x²

multiply 5x by y= 5xy

multiply y by 5x=5xy

multiply y by y=y²

Bringing into an equation it gives;

25x²+5xy+5xy+y²

=25x²+10xy+y²

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One inlet pipe can fill an empty pool in 6 hours, and a drain can empty the pool in 12 hours. How long will it take the pipe to
Ainat [17]

Answer: 12 hours

Step-by-step explanation:

Let x = time it takes to fill the pool if the inlet pipe and drain pipe are both open

1/6 = portion of pool filled per hour by the inlet pipe

1/12 = portion of pool emptied per hour by the drain

1/x = portion of pool filled per hour if the inlet pipe and drain are both open

Then, 1/6 - 1/12 = 1/x

Multiply by the LCD, 12x, to obtain

2x - x = 12

x = 12 hours

5 0
3 years ago
What is the area of a rectangle with side lenghts 3x+2 and x-4
melamori03 [73]
For a rectangle, A = LW.

A = (3x + 2)(x - 4)

A = 3x^2 - 12x + 2x - 8

A = 3x^2 -10x - 8
6 0
4 years ago
Help quickly please!!!
vagabundo [1.1K]

Answer:

1/3 B h

1/3(50.24)(10)

plug in into a calculator

6 0
4 years ago
If the cost of those white tiles are $ 3.50 what is the unit cost per white
ryzh [129]

Answer:

how many tiles are "those" bc you cant figure it out without that info sorry.

Step-by-step explanation: y

7 0
3 years ago
How do you solve: secx=-5/2, tanx&lt;0<br><br> Find all six trig functions
Brut [27]

Answer:

sec theta = (sqrt24/5) cos theta = -2/5 tan theta = (-[sqrt 21]/2) sec theta = 5/2 csc theta = (5sqrt21)/21 cot theta = (-2sqrt21)/21

Step-by-step explanation:

During the problem, secx = -5/2, we can assume that as cos = -2/5. -2 = x. 5 = r. find for Y with: x^2+y^2=r^2. After that, plug in for the variables and you get all the answers. Rationalize the square roots, don't forget.

5 0
3 years ago
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