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3 years ago

Please help and I will give brainliest ( no trolling )

Mathematics

1 answer:

Shtirlitz [24]3 years ago

3 0

Answer:

B) restaurant to the skating rink

C) (3,2)

Step-by-step explanation:

B) restaurant to the skating rink

C) (3,2)

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Given that a=4, b=4 and c=-2 work out b(squared) -2ac

Nimfa-mama [501]

Answer:

Step-by-step explanation:

substitute the given values of a, b and c into the expression:

b² - 2ac = 4² - (2 x 4 x -2)

= 16 - (-16)

= 16 + 16

= 32

3 0

3 years ago

A side of the triangle below has been extended to form an exterior angle of 64°. Find the value of x.

horsena [70]

180- 64 =116

x°+18°+116°= 180°

x°+134°=180°

x°=180-134

x°=46°

8 0

3 years ago

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Water is leaking out of an inverted conical tank at a rate of 6800 cubic centimeters per min at the same time that water is bein

Bad White [126]

Answer:

The rate at which water is being pumped into the tank is 13,913.27 cubic centimetre per minute

Step-by-step explanation:

Given that, the height of the conical tank is 13 meters and diameter is 3 meters.

Radius = $\frac32$ meters

$\therefore \frac{radius }{height}=\frac {\frac{3}{2}}{13}$

$\Rightarrow \frac{radius }{height}=\frac {3}{26}$

$\Rightarrow radius=\frac {3}{26}\times height$ ......(1)

The volume of the cone is $V=\frac13 \pi r^2 h$

Now putting $r=\frac{3}{26} h$

$V=\frac13 \pi (\frac3{26}h)^2 h$

$\Rightarrow V=\frac{3}{676} \pi h^3$

Differentiating with respect to t

$\frac{dV}{dt}=\frac{3}{676}\pi .3h^2 \frac{dh}{dt}$

$\Rightarrow \frac{dV}{dt}=\frac{9}{676}\pi h^2 \frac{dh}{dt}$

Given that, the water level is rising at a rate of 17 cm per minute when the height 1 meter= 100 cm .i.e $\frac{dh}{dt}=17$ cm/min

Putting $\frac{dh}{dt}=17$

$\frac{dV}{dt}=\frac{9}{676}\pi h^2 \times 17$

$\frac{dV}{dt}|_{h=100}=\frac{9}{676}\pi (100)^2 \times 17$

≈7,113 cubic centimetre per minute

The volume of water increases 7,113 cubic centimetre per minute while 6,800 cubic centimetre per minute is leaking out.

It means the required rate at which water is being pumped into the tank is

=(7,113+6,800)cubic centimetre per minute

=13,913 cubic centimetre per minute

4 0

4 years ago

The population of a city in the year 2000 was 4,400. In 2010, the population was 5,060. Find the percent increase in the populat

larisa86 [58]

Answer:

total population in the year 2000=4400

total population in the year 2010=5060

no of people increased=5060-4400

=660

increase percent=660/4400*100%

=3/20*100%

=15%

Step-by-step explanation:

15/100*5060

0.15*5060

759

in 2020 population will be

5060+759

5819

therefore the population will be 5819 in 2020

6 0

3 years ago

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I need help asap explain if rational or irrational plz help

7nadin3 [17]

Answer:

Step-by-step explanation:

your question is too long plz make it short i don't have so much time to ans it fully okay?

6 0

3 years ago