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1 year ago

What is fraction 1 over 3 x3 + 5.2y when x = 3 and y = 2 13.4 16.4 19.4 28.4

Mathematics

2 answers:

torisob [31]1 year ago

6 0

Answer:

B. 13.4

Step-by-step explanation:

We have the fraction, .It is required to find the value of the fraction when

x = 3 and y = 2.So, on substituting these values,

we get,i.e. i.e. i.e.

So, the value of the fraction is 13.4

Hence, option B is correct.

djyliett [7]1 year ago

5 0

Answer:

13.4

Step-by-step explanation:

1/3 * 3x + 5.2y

1/3 * 3(3) + 5.2(2)

1/27 + 10.4

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Use Hooke's Law to determine the work done by the variable force in the spring problem. A force of 450 newtons stretches a sprin

vlada-n [284]

Answer:

The work done is 202.50Nm

Step-by-step explanation:

Given

$F =450N$

$x_1 = 30cm$

$x_2 = 60cm$

Required

The work done

First, we calculate the spring constant (k)

$F = kx_1$

$450N = k *30cm$

$k = \frac{450N}{30cm}$

$k =15N/cm$

So:

$F = kx_1$

$F(x) = 15x$

The work done using Hooke's law is:

$W =\int\limits^a_b {F(x)} \, dx$

This gives:

$W =\int\limits^{60}_{30} {15x} \, dx$

Rewrite as:

$W =15\int\limits^{60}_{30} {x} \, dx$

Integrate

$W =15 \frac{x^2}{2}|\limits^{60}_{30}$

This gives:

$W =15 *\frac{60^2 - 30^2}{2}$

$W =15 *\frac{2700}{2}$

$W =15 *1350$

$W =20250N-cm$

Convert to Nm

$W =\frac{20250Nm}{100}$

$W =202.50Nm$

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3 years ago

A lighthouse casts a shadow 32 meters long at the same time a nearby statue casts a shadow that is 9 meters long. If the statue

Pavlova-9 [17]

Answer:

Step-by-step explanation:

Ok, so basically let's start with a proportion.

x/32 = 11.25/9

Cross multiply:

x * 9 = 32 * 11.25

9x = 32 * 11.25

9x = 360

Solving for variable 'x'.

Divide each side by '9'.

x = 40

I don't know if this is the correct answer, but it was based on my math. I hope this helps!

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Your answer would be D.
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Answer:

60%

Step-by-step explanation:

Divide the amount of people who showed up by the total invited...

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To convert a decimal to a percent, multiply the decimal by 100%...

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