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3 years ago

Solve the equation for y. 1 5. *x+y=4

Mathematics

1 answer:

Olegator [25]3 years ago

7 0

You simply need to subtract x from both sides:

$x+y=4 \iff x+y-x=4-x \iff y=4-x$

In fact solving an equation for a variable means to isolate that variable on one side of the equation, and moving all remaining terms on the other side.

In this case, we solved the equation for y, because we wrote it as $y=\ldots$

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3 years ago

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A classroom is 20 feet long. The office is 82% longer than the classroom. How long is the office?

enyata [817]

Answer:

The length of the office is 36.4 ft

Step-by-step explanation:

The length of the classroom = 20 ft long

The length of the office = 20 ft + 82% of the classroom length

Now, 82 % of classroom length = 82 % of 20 ft

⇒ $\frac{82}{100} \times 20 = 16.4$

or, 82% of 20 ft = 16.4 ft

⇒The length of the office = 20 ft + 16.4 ft = 36.4 ft

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3 years ago

Solve sin (x)(sin(x)-1) =0

iogann1982 [59]

Answer:

$x=n \pi$ or $x=2\pi n+\frac{\pi}{2}$

Step-by-step explanation:

The given trigonometric equation is;

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By the zero product property;

$\sin x=0$ or $\sin x-1=0$

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Therefore the general solution is:

$x=n \pi$ or $x=2\pi n+\frac{\pi}{2}$

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jonny [76]

B is the answer hope this helps

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