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vaieri [72.5K]
3 years ago
11

Hi can any one please help me I really need help please please let me know ya

Mathematics
1 answer:
aalyn [17]3 years ago
5 0
A. V= l x b x h
= 5cm x 4cm x 10cm
= 200 squared centimetres

C. V= S squared x h divided by 3
= 15cm x 17cm divided by 3
= 85 squared centimetres

D. V= b x h x l divided by 2
= 8cm x 10cm x 13cm divided by 2
= 520 cubed centimetres

Well am not sure about the other two but I hope this helps ya
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Which are the solutions of x2 = –7x – 8?
Yanka [14]
You can start by rewriting the equation so that the right side equals zero. Add -7x and 8 to both sides.

x^2+7x+8=0

You can now use the quadratic equation (below), where a=1, b=7, and c=8, to find solutions. Plug in these values for a, b, and c into the equation and simplify.

\frac{-b \pm \sqrt{b^2-4(ac)}} {2a}
\frac{-7 \pm \sqrt{7^2-4(1 \times 8)}} {2 \times 1}
\frac{-7 \pm \sqrt{49-32}} {2}
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The final answer is the combination of both solutions.
x=\frac{-7}{2} \pm \frac{\sqrt{17}} {2} \approx -3.5 \pm 2.06.

Or approximately...
x=(-3.5-2.06) \approx -5.56, (-3.5+2.06) \approx-1.44
8 0
3 years ago
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A pump can fill a swimming pool in 8 hours. The pool also has a drain that can empty the pool in 10 hours. If someone turns on t
cluponka [151]

Answer:

40 hours will it take for the pool to fill.

Step-by-step explanation:

A pump can fill a swimming pool in 8 hours.

Work done by pump to fill in 1 hour is  \frac{1}{8}

The pool also has a drain that can empty the pool in 10 hours.

Work done by pump to drain in 1 hour is  \frac{1}{10}

If someone turns on the pump to fill the pool, but forgets to shut the drain.

Work done by both pipe in 1 hour is

W=\frac{1}{8}-\frac{1}{10}

W=\frac{10-8}{80}

W=\frac{2}{80}

W=\frac{1}{40}

Both pipe filled \frac{1}{40} part of pool in hours = 1

Both pipe filled complete pool in hours = \frac{1}{\frac{1}{40}}=40

Therefore, 40 hours will it take for the pool to fill.

7 0
3 years ago
Please solve with work
LenaWriter [7]

Answer:

Ok please solve with work

Step-by-step explanation:


3 0
3 years ago
What is the equation of the asymptote for the exponential function shown on the graph?
lakkis [162]

Answer:

B) y=0

Step-by-step explanation:

The exponential function shown has a horizontal asymptote at the line y=0, which means that y will approach 0 as the value of x decreases. Therefore, B is correct.

7 0
3 years ago
36 is _______% less than 60?
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3 years ago
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