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3 years ago

How do you solve variable equations?

Mathematics

1 answer:

DerKrebs [107]3 years ago

7 0

Answer:

Subsitution/Elimination method

Step-by-step explanation:

There are many ways , it all depends on your question. For example, first look at your equation and see if you can simplify the equation to make it easier. Then I recommend using the subsituition or elimination method because it is easy.

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Which equation can be used to represent "six added to twice the sum of a number and four is equal to one-half of the difference

UkoKoshka [18]

Answer:

6+(2x+4)=1/2-(3+x) okay I hope this is it.

Good luck on this.

6 0

3 years ago

I will mark you brainliest if its correctly

zheka24 [161]

Step-by-step explanation:

sina = -√3/2

$\cos(a) = \sqrt{1 - { \sin(a) }^{2} }$

$= \sqrt{1 - { (\frac{ - \sqrt{ 3} }{2}) }^{2} }$

$= \sqrt{ \frac{4 - 3}{4} }$

$= \sqrt{ \frac{1}{4} }$

=±1/2

Since, π<a<3π/2

cos a = -1/2

$\tan(a )= \frac{ \sin(a) }{ \cos(a) }$

$\tan(a ) = \sqrt{3}$

OptionB

8 0

3 years ago

In this graph, the y-intercept of the line is( )

Yuliya22 [10]

Answer:

Y Intercept= -3

Equation= y=3x-3

Step-by-step explanation:

5 0

4 years ago

Given a polynomial function f(x), describe the effects on the y-intercept, regions where the graph is increasing and decreasing,

alina1380 [7]

Answer:

We are have the function f(x).

Part 1: It is given that the function f(x) is transformed to f(x)+2.

This gives us that the function is translated 2 units upwards.

As, the y-intercept of f(x) is f(0). So, the y-intercept of f(x)+2 is f(0)+2, which is also translated 2 units up.

Translation does not change the behavior of the function.

So, if f(x) is increasing (or deceasing), then f(x)+2 will be increasing(or decreasing) respectively.

Moreover, f(x)+2 will be even or odd if f(x) is even or odd respectively.

Part 2: It is given that the function f(x) is transformed to $\frac{-1}{2}f(x)$

This gives us that the function is shrinked vertically by a factor of $\frac{1}{2}$ followed by a reflection across x-axis.

Also, the y-intercept of is $\frac{-1}{2}f(0)$ .

The graph of f(x) after changing to $\frac{-1}{2}f(x)$ will flip over the x-axis.

So, the function $\frac{-1}{2}f(x)$ will increase or decrease when f(x) decrease or increase respectively.

Moreover, $\frac{-1}{2}f(x)$ will be even if f(x) is even or odd respectively.

5 0

3 years ago

What is the sum of the polynomials? 11x^2-5 + x+4

liraira [26]

Answer:

$11x^{2}+x-1$

Step-by-step explanation:

we have

$(11x^{2} -5) +(x+4)$

we know that

The sum of a quadratic equation and a linear equation will be a quadratic equation

Combine like terms

$(11x^{2})+(x)+(-5+4)$

$11x^{2}+x-1$

5 0

4 years ago

Read 2 more answers