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3 years ago

5

PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS!!

2 answers:

loris [4]3 years ago

8 0

11x+3

iam not sure check with another guy but i got this

Mamont248 [21]3 years ago

8 0

$\\ \tt\hookrightarrow 7x+4+4x+9=90$

$\\ \tt\hookrightarrow 11x+13=90$

$\\ \tt\hookrightarrow 11x=77$

$\\ \tt\hookrightarrow x=7$

m<A=7(7)+4=49+4=53

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A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 10.4

vlabodo [156]

Answer:

Therefore the diameter of the hole is $1.94 \times 10^{-3}$ m.

Step-by-step explanation:

Bernoulli's equation,

$P_1+\frac12 \rho v^2_1+\rho g h_1= P_2+\frac12 \rho v^2_2+\rho g h_2$

P₁ = P₂= atmospheric presser

$\rho$ = density

$\frac12 \rho v^2_1+\rho g h_1= \frac12 \rho v^2_2+\rho g h_2$ [since P₁ = P₂]

$\Rightarrow\rho (\frac12 v^2_1+ g h_1)= \rho(\frac12 v^2_2+ g h_2)$

$\Rightarrow\frac12 v^2_1+ g h_1= \frac12 v^2_2+ g h_2$

$\Rightarrow\frac12 v^2_2-\frac12 v^2_1=g h_1- g h_2$

$\Rightarrow v^2_2- v^2_1=2g h$ [ $h_1-h_2=h$ ]

Here $v_1\approx 0$

$\Rightarrow v^2_2=2g h$

$\therefore v_2=\sqrt {2gh$

Here g= 9.8 m/s² , h = 10.4 m

The velocity of water that leaves from the hole $v_2$ = $\sqrt {2\times 9.8\times 10.4}$ m/s

=14.28 m/s.

Given, the rate of flow from the leak is $2.53\times 10^{-3}$ $m^3/min$

$=\frac{2.53\times 10^{-3}}{60}$ $m^3/s$

Let the diameter of the hole be d.

Then the cross section area of the hole is $=\pi (\frac d2)^2$

We know that,

The rate of flow = Cross section area × speed

$\Rightarrow \frac{2.53\times 10^{-3}}{60} =\pi (\frac d2)^2\times 14.28$

$\Rightarrow (\frac d2)^2=\frac{2.53\times 10^{-3}}{60\times 14.28\times \pi}$

$\Rightarrow d= 1.94 \times 10^{-3}$

Therefore the diameter of the hole is $1.94 \times 10^{-3}$ m.

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4 years ago

Here is some record-keeping from a coffee shop about their paper cups. Cups are delivered 2,000 at a time. How many paper cups a

Akimi4 [234]

Answer:

1748

Step-by-step explanation:

Tuesday + Wednesday - Monday

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Answer: Ello mate, this image I provided below should help you out, let me know if you need anything else.

Step-by-step explanation:

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She will need 8 tables. Happy Thanksgiving! :D

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A square has a perimeter of 12x + 52 units which expression represents the side length of the square units

Anarel [89]

The perimeter of a square: P = 4s.

The equation:

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s = 3x + 13

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