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3 years ago

Please help its math

Mathematics

2 answers:

nataly862011 [7]3 years ago

6 0

Let the length of the radius = r feet.

Diameter = 2r = 2 x 6.8 = 13.6 feet

Circumference = 2 $\pi$ r = 2 x 3.14 x 6.8 = 42.704 feet = approx. 42.7 feet

user100 [1]3 years ago

3 0

The diameter is 13.60 feet.

The circumstance is approximately 42.70 feet.

Look at the attached picture

Hope it will help you

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Justin spends $21.75 on 6 rides and three sodas for his friends. Jerry spends $39.50 on 10 rides and 6 sodas for his friends. Ho

SIZIF [17.4K]

R = rides
S = sodas

6R + 3S = $21.75 —> -12R - 6S = -43.5
10R + 6S = $39.50–>10R + 6S = 39.5

Multiplying Justin’s whole equation by -2 will bring out the 6S’, so we can focus on the cost of one ride.

-2R = -4
Divide both sides by -2
So for one ride, it would cost $2.

To find the cost for one soda, we plug in the cost for a ride.

6(2) + 3S = $21.75
12 + 3S = $21.75
3S = $9.75
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3 years ago

Solve the following quadratic equation x+12x+36 - 16

Doss [256]

Answer:

x= -2, x= -10

Step-by-step explanation:

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Began by setting this quadratic equation to 0. To do this, in this equation you must subtract.

x^2+12x+20=0

Next, we plug this into the quadratic formula, where a in this case is 1(there is nothing in front of x^2), b is equaled to 12(there is a 12 as the coeefficient of 12x), and c is equaled to 20.

The quadratic formula is as goes:

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Answer:

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Step-by-step explanation:

We want to model the position of the submarine as a function of time.

Notice that we have a constant amount. The initial depth: 750 meters

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-50t.

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Then the equation that represents the new position of the submarine in relation to the level of the sea:

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