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3 years ago

Please help with my math (homework) problem. What's 1+2? 10 points.

Mathematics

2 answers:

umka21 [38]3 years ago

7 0

Answer:3

Step-by-step explanation:1+2=3

jeyben [28]3 years ago

3 0

Answer:

Step-by-step explanation:

hope thkixd hel-s

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A pair of hiking boots originally priced at $170 is on sale for 10% off. What is the sale price of the boots?

Marizza181 [45]

The sale price of the hiking boots is $153

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3 years ago

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Simplify: cos2x-cos4 all over sin2x + sin 4x

GrogVix [38]

Answer:

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}=\tan\left(x\right)$

Step-by-step explanation:

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}$

Apply formula:

$\cos\left(A\right)-\cos\left(B\right)=-2\cdot\sin\left(\frac{A+B}{2}\right)\cdot\sin\left(\frac{A-B}{2}\right)$ and

$\sin\left(A\right)+\sin\left(B\right)=2\cdot\sin\left(\frac{A+B}{2}\right)\cdot\sin\left(\frac{A-B}{2}\right)$

We get:

$=\frac{-2\cdot\sin\left(\frac{2x+4x}{2}\right)\cdot\sin\left(\frac{2x-4x}{2}\right)}{2\cdot\sin\left(\frac{2x+4x}{2}\right)\cdot\cos\left(\frac{2x-4x}{2}\right)}$

$=\frac{-\sin\left(\frac{2x-4x}{2}\right)}{\cos\left(\frac{2x-4x}{2}\right)}$

$=\frac{-\sin\left(\frac{-2x}{2}\right)}{\cos\left(\frac{-2x}{2}\right)}$

$=\frac{-\sin\left(-x\right)}{\cos\left(-x\right)}$

$=\frac{-\cdot-\sin\left(x\right)}{\cos\left(x\right)}$

$=\frac{\sin\left(x\right)}{\cos\left(x\right)}$

$=\tan\left(x\right)$

Hence final answer is

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}=\tan\left(x\right)$

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3 years ago

It takes most oceans about 6 hours to go from high tide to low tide.Suppose that the water level decreases at a rate of 3 feet p

juin [17]

Answer:

From the level of high tide to low tide, it's 18 feet.

Step-by-step explanation:

To find the change in water level, we multiply the rate (3 ft / hr) by the time (6 hrs), obtaining 18 ft.

The water level changes by 18 ft.

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2 years ago

Juanita rolls a number cube x times. For which value of x are the experimental probability and the theoretical probability most

ehidna [41]

Answer:

1000

Step-by-step explanation:

The theory is that "experimental probability goes closer and closer in value to the theoretical probability as the number of trials increase."

So more trials means more they are closer and equivalent.

So out of the answer choices, the largest number of trials is 1000.

1000 is the correct answer.

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Answer:

= 9.2 cm

Step-by-step explanation:

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