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3 years ago

V = 1/3 πr^2h Pls help

1 answer:

5 0

Well if we are solving for V then the answer is V= V = πr^2h/3
If your solving for a different letter then tell me. Thanks

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The expression (1.2x + 4) represents the number of miles Angie jogged during a race, and 3x represents the number of miles that

zhannawk [14.2K]

<h3>Answer: 1.8x - 4</h3>

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Explanation:

Subtract the two expressions

Tomas - Angie = (3x) - (1.2x+4) = 3x - 1.2x-4 = 1.8x-4

This represents how many more miles Tomas jogged compared to Angie.

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A more concrete example would be to say hypothetically

Tomas = 10 miles

Angie = 4 miles

So Tomas - Angie = 10-4 = 6 means he jogged 6 more miles than Angie.

That's why we subtracted. The order of subtraction matters. Saying 10-4 is different from 4-10.

5 0

3 years ago

(50 Points)

Yanka [14]

C
If you plug in the values in that equation, it works.

5 0

3 years ago

Read 2 more answers

Jerry was using matrices to solve the system of three equations. He has shown all his steps. Did he make a mistake if so in what

melomori [17]

There are several ways to solve a system of equation; one of these ways is the use of matrix.

<em>Jerry made a mistake at step 2</em>

From the attachment, the step 1 is represented as:

$\mathbf{\frac 12R_1 \left[\begin{array}{cccc}1&1&1&0\\5&3&-2&-4\\3&2&1&1\end{array}\right] }$

The equation in step 2 is given as:

$\mathbf{R_2 = 5R_1 - R_2}$

This means that:

We subtract the elements of row 2 from the elements of row 1, multiplied by 5

So, we have:

$\mathbf{R_2 = 5\left[\begin{array}{cccc}1&1&1&0\end{array}\right] } - \left[\begin{array}{cccc}5&3&-2&-4\end{array}\right] }$

Expand

$\mathbf{R_2 = \left[\begin{array}{cccc}5&5&5&0\end{array}\right] } - \left[\begin{array}{cccc}5&3&-2&-4\end{array}\right] }$

Subtract corresponding cells

$\mathbf{R_2 = \left[\begin{array}{cccc}0&2&7&4\end{array}\right] }$

So, the new row 2 elements should be:

$\mathbf{ \left[\begin{array}{cccc}0&2&7&4\end{array}\right] }$

However, the row 2 elements of Jerry's steps are:

$\mathbf{R_2 = \left[\begin{array}{cccc}0&-2&-7&-4\end{array}\right] }$

This means that:

Jerry made a mistake; and the mistake is at step 2