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Brrunno [24]
3 years ago
6

Solve the equation 4c^2+7c-5=0 using the quadratic formula.

Mathematics
1 answer:
solmaris [256]3 years ago
5 0

c = \frac{-7+\sqrt{129} }{8}  ,\frac{-77-\sqrt{129} }{8}

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32.5% of what number is 12.48?
vagabundo [1.1K]

Answer:

38.4;

Step-by-step explanation:

32.5% × ? = 12.48

? =

12.48 ÷ 32.5% =

12.48 ÷ (32.5 ÷ 100) =

(100 × 12.48) ÷ 32.5 =

1,248 ÷ 32.5 =

38.4;

5 0
2 years ago
An arc of a circle is 3πm long, and it subtends an angle of 72° at the center of the circle. Find the radius of the circle.
Alex777 [14]
72⁰_______3π m
360⁰______15π m

C = 15π = 2π r
r = 7•5 m
8 0
3 years ago
A circular pool if filling with water. Assuming the water level will be 4' deep and the diameter is 20' , what is the volume of
Yuliya22 [10]

35,569.92 L of water is required to fill the pool

Step-by-step explanation:

  • Step 1: Find the area of the circular pool when radius = 20/2 = 10 ft

⇒ Area = πr² = 3.14 × 10² = 314 ft²

  • Step 2: Find the volume of the pool

Volume = Area × Depth

             = 314 × 4 = 1256 ft³

  • Step 3: Convert the volume into liters.

Volume of water = 1256 × 28.32 = 35,569.92 L (∵1 ft³ = 28.32 L)

8 0
3 years ago
Why equals 2X plus 7Y equals 5X +4 graph the answer
nevsk [136]
You can graph the answer on cymath.com

3 0
2 years ago
A submarine dives at a constant speed of 10 m/s at a diving angle measured from the vertical
valina [46]

Answer:

155.3 m

Step-by-step explanation:

<u>We have:</u>

θ: is the angle measured from the vertical = 75 °

v = is the speed of the submarine = 10 m/s

t = 1 min

The deep of the front end of the submarine at the end of a 1-minute drive is given by the following ratio:

cos (\theta) = \frac{x}{d}  

<u>Where:</u>

d: is the distance traveled by the submarine in 1 minute

x: is the deep to find

The distance, d, is:

d = v*t = 10 \frac{m}{s}* 1 min * \frac{60 s}{1 min} = 600 m

Now, the deep is:

cos (75) = \frac{x}{600}  

x = cos(75)*600 = 155.3 m

Therefore, the deep of the front end of the submarine at the end of a 1-minute drive is 155.3 m.

I hope it helps you!

3 0
3 years ago
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