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3 years ago

Find the exact solution of x. 3x2 + 7 = 28

Mathematics

1 answer:

faltersainse [42]3 years ago

6 0

Exact Form:
x=√7, −√7
Decimal Form:
x=2.64575131… ,−2.64575131…

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Turn this sentence into an equation.

pochemuha

The answer for this problem is 22=2g

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3 years ago

2z – 33 = 3(z + 4) – 4z what is the answer?

MAVERICK [17]

The answer is 15!
Hope this helps!

3 0

3 years ago

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Which scale is equivalent to 1 cm to 1 km?

AfilCa [17]

Answer:

1 to 100,000

Step-by-step explanation:

Centimeters and kilometers are scales of the official unit of length in the SI, the meters.

In a meter there are 100 centimeters, and in a kilometer there are 1000 meters, so in a kilometer there are 1000(100)cm ⇒ 100,000cm

So the scale of 1 centimeter to 1 kilometer is:

1 to 100,000

4 0

4 years ago

andre rode his bike at a constant speed he rode 1 mile in 5 minutes which of these equations represents the amount of time in mi

Alex777 [14]

We are given

Andre rode his bike at a constant speed he rode 1 mile in 5 minutes

Firstly, we will find constant speed

In 5 minutes , distance travelled =1 miles

so, we get speed

$v=\frac{1}{5} mile/min$

Let's assume T is time in minutes

D is the distance in miles

we know that

$Time=\frac{Distance}{speed}$

so, we can plug value

and we get

$T=\frac{D}{\frac{1}{5} }$

so, we get

$T=5D$ ...............Answer

3 0

3 years ago

What is the diameter of the cylinder

vfiekz [6]

Diameter of cylinder is 14 units.

<h3>Explamation :</h3>

Given :-

Volume of cylinder = 245π cubic units
Height of cylinder = 5 units

To Find :-

Diameter of cylinder?

Solution :-

Firstly lets calculate radius of cylinder by using formula of volume of cylinder, as we know that;

Volume of cylinder = πr²h

Putting all values we get;

➸ 245π = π × r² × 5

By cutting 'π' with 'π' we get;

➸ 245 = r² × 5

➸ 245/5 = r²

➸ 49 = r²

➸ √(49) = r²

➸ √(7 × 7) = r²

➸ 7 = r

➸ r = 7 units

Hence, radius of cylinder is 7 units.

Now lets calculate its diameter, as we know that;

Diameter = Radius × 2

Putting all values we get;

➸ Diameter = 7 × 2

➸ Diameter = 14 units

Hence, diameter of cylinder is 14 units.

5 0

2 years ago

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