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4 years ago

How do I solve 1/2x+2×1/2x=20

Mathematics

1 answer:

padilas [110]4 years ago

7 0

Answer:

x = 40/3

Step-by-step explanation:

$\frac{1}{2x} +2*\frac{1}{2x} = 20 \\\frac{1}{2x} +\frac{2}{2x} = 20 \\\frac{3}{2x} = 20 \\x = 20/\frac{3}{2} \\x = 20*\frac{2}{3} \\x = \frac{40}{3} \\$

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Step-by-step explanation:

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3 years ago

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MrRa [10]

<h2>Writing an linear equation from a given scenario</h2>

Answer:

Choice B

<h3>Step-by-step explanation:</h3>

<em>Please refer to my answer from this question to know more about writing a </em><em>linear</em><em> </em><em>equation</em><em> from a given scenario: </em><em><u>brainly.com/question/24599307</u></em>

Scenario: A submarine dives $70$ feet per minute.

We let $f$ , be the position of the submarine from sea level as a function of $t$ , the time (in minutes) since the submarine dived.

The given scenario states that for every minute, the position of the submarine <u>decreases</u> (because the submarine is going in a downward direction) by $70$ feet. So $f(t)$ can be defined as $-70t$ .

Now we can select two points for the graph. We can select points $(1, f(1))$ and $(2, f(2))$ .

Evaluation of function:

$f(1) = -70(1) \\ f(1) = -70$

$f(2) = -70(2) \\ f(2) = -140$

Our points are $(1, -70)$ and $(2, -140)$

Choice A doesn't touch our chosen points. In Choice C, it would be the case if the submarine is going in upward direct.

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3 years ago

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mars1129 [50]

Answer:

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Step-by-step explanation:

Michaels starts the day with $782.88 in his account.

Then he uses $55 from his debit cars to pay for car repairs. Subtract 55 from 782.88 to get $727.88 in the account after the repairs.

After that, he uses $89.50 for a clothing purchase. Subtract $89 from $727.88 to get 638.88, then subtract another 50 cents to get $638.38 after the clothing purchase.

Lastly, he withdraws $70 from his account. Subtract 70 from $638.38 to get a final answer of $568.38 at the end of the day.

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