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3 years ago

Use distributive property to remove the parentheses -5(-2v+3y-1)

Mathematics

1 answer:

RoseWind [281]3 years ago

4 0

Answer:

10v+-15y+5

Step-by-step explanation:

With distributive property, you multiply the number outside the parentheses to the numbers inside the parentheses separately then add them together and combine like terms.

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Inventa un reparto donde el resultado sea 4/5

maks197457 [2]

Answer:

Snacks are distributed in a school.

There are only 36 apples and 44 bananas for the students, but there are 72 orange juices and 28 tangerine juices. The distribution would be 4/5, it would take 20 fruits so that the snack per student be the same.

Step-by-step explanation:

A fraction is a whole number that expresses a certain number of portions that are taken from a whole divided into parts.

It is represented by a bar that separates the first part (numerator) from the second (denominator).

The numerator represents the number of parts taken and the denominator represents the entire element.

For example, 3 eaten parts of a 4-piece cake.

3/4 of the cake was eaten.

5 0

3 years ago

Solve the equation sin x + cos x=cos 2x for 0 27. x

vodka [1.7K]

Answer:

$x=\frac{\pi}{4}$ and $x=-\frac{3\pi}{4}$

Step-by-step explanation:

We are given that sin x+cos x=cos 2x

We have to solve the given equation for $0\leq x\leq 2\pi$

$sin x+cos x=cos^2x-sin^2x$

Because $cos 2x=cos^2-sin^2$

$sinx+cos x=(sinx +cos x)(sinx-cos x)$

$1 =sin x-cos x$

$sin x=cos x$

$\frac{sinx }{cos x}=1$

$tan x=1$

$tan x=\frac{sinx}{cos x}$

$tan x=tan\frac{\pi}{4}$

$x=\frac{\pi}{4}$

Tan x is positive in I and III quadrant

In III quadrant angle $\theta$ replace by $\theta -\pi$

Therefore, $tan x=tan (\frac{\pi}{4}-\pi)=tan\frac{\pi-4\pi}{4}=tan\frac{-3\pi}{4}$

$x=-\frac{3\pi}{4}$

8 0

3 years ago

What polynomial identity should be used to prove that 35 = 8 + 27

Julli [10]

Answer:

Sum of cubes identity should be used to prove 35 =3+27

Step-by-step explanation:

Prove that : 35 = 8 +27

Polynomial identities are just equations that are true, but identities are particularly useful for showing the relationship between two apparently unrelated expressions.

Sum of the cubes identity:

$a^3+b^3=(a+b)(a^2-ab+b^2)$