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3 years ago

4÷6.12= what is the answer?

Mathematics

1 answer:

Ede4ka [16]3 years ago

7 0

Answer:

0.65359477124. this is probably the wrong answer so I'm just gonna guess u needed the answer the other way around because it makes more sense so 6.12 ÷ 4 = 1.53.

Step-by-step explanation:

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The coordinate of point Q' is (3 , 4).

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4 years ago

70% of ___ is 35.<br> Explain your method.

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Find the sum of -4a-3 and 7a-4.

Anna71 [15]

Answer: 3a - 7

Step-by-step explanation:

(-4a - 3) + (7a - 4)

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3 years ago

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PLEASE HELP ASAP DUE TONIGHT NEED YOUR HELP WILL MARK THE BRAINLEST

Alchen [17]

1a.

$0.42 = \frac{0.42}{1} = \frac{42}{100} = \frac{21}{50}$

1b. Manipulate the numbers using algebra.

$100x = 42.2222. \\ 10x = 4.2222...$

Then, subtract and solve for x.

$90x = 38 \\ x = \frac{38}{90} \\ x = \frac{19}{45}$

1c. Same thing, manipulate the numbers.

$100x = 42.4242... \\ x = 0.4242...$

Again, subtract and solve for x.

$99x = 42 \\ x = \frac{42}{99} \\ x = \frac{14}{33}$

2a. Jacob is pulling the 3 out of the root operation without getting the root of it.

$\sqrt{75} = \sqrt{3} \times \sqrt{25 } = 5 \sqrt{3}$

2b. Without using a calculator, the only way that is feasible is by trial and error, using perfect squares. For example: you know

$\sqrt{3}$

is somewhere between 1 and 2, as these are the closest perfect square roots to it. Try a value, say 1.5.

${1.5}^{2} = 2.25$

Not bad, seems a bit low. Lets try 1.6.

${1.6}^{2} = 2.56$

Seems like we can go bigger. 1.7 this time.

${1.7}^{2} = 2.89$

Alright, we are getting close to 3. 1.8.

${1.8}^{2} = 3.24$

Oops, too big. But no problem, because we now know that the value we are looking for is between 1.7 and 1.8, meaning the first decimal place must be 7. Let's keep going.

${1.75}^{2} = 3.0625 \\ {1.74}^{2} = 3.0276 \\ {1.73}^{2} = 2.9929$

Alright, the value is between 1.73 and 1.74.

${1.735}^{2} = 3.01... \\ {1.734}^{2} = 3.006... \\ {1.733}^{2} = 3.003... \\ {1.732}^{2} = 2.999...$

Bingo, your approximation is 1.732.

3. Convert each number to a tenth-rounded decimal.

$\pi = 3.1$

$\sqrt{3} = 1.7$

Find the square root of 5 first, as then you only have to double it for the remaining number.

${2.5}^{2} = 6.25 \\ {2.3}^{2} = 5.29 \\ {2.2}^{2} = 4.84 \\ {2.25}^{2} = 5.0625 \\ \sqrt{5} = 2.2$

The reason I take the 2.5 is to see whether to round up or down.

Then the last one is double the previous.

$2 \sqrt{5} = 4.4$

3b.

$\sqrt{3} < \sqrt{5} < \pi< 2 \sqrt{5}$

Hope this all helps.

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4 years ago

. If x tan 45° sin 30° = cos 30° tan 30°, then x is equal

Phantasy [73]

Answer:

x = $\frac{\sqrt{3} }{3}$

Step-by-step explanation:

You can either use the unit circle to find your values and then solve for x or plug it into the calc directly to find your answer (don't forget to put your mode on deg!). It is much faster to plug it into your calc. Simply just divide both sides by tan45°cos30° and you should isolate x and find your answer.

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4 years ago