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3 years ago

10

What are some equations with -3 as the solution?

1 answer:

erastovalidia [21]3 years ago

3 0

Step-by-step explanation:

Here are some equations

${:}\longrightarrow\sf 3x+9=0$

${:}\longrightarrow\sf x+3=0$

${:}\longrightarrow\sf 6x+18=0$

${:}\longrightarrow\sf x^2-9=0$

${:}\longrightarrow\sf x+7=4$

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Can someone plz help me

alekssr [168]

Answer:

C = -13.78

Step-by-step explanation:

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3 years ago

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Mickey planted a 34" tree that grows 7.5" every year. How tall will the tree be in 5 years

Nuetrik [128]

Answer:

71.5"

Step-by-step explanation:

7.5x5=37.5

37.5+34=71.5"

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3 years ago

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5+ 3 cos ½x = 7<br>how to find the x?

Anon25 [30]

Answer:

$x=\pm 2 arcos(\frac{2}{3})+4k\pi$

where $k$ is an integer

Step-by-step explanation:

$5+3\cos(\frac{1}{2}x)=7$

We are going to isolate the trig expression first.

Subtract 5 on both sides:

$3\cos(\frac{1}{2}x)=2$

Divide both sides by 3:

$\cos(\frac{1}{2}x)=\frac{2}{3}$

Now since $\cos(u)$ is even then $\cos(u)=\cos(-u)$ .

So we have:

$\cos(\frac{1}{2}x)=\frac{2}{3}$

implies:

$\frac{1}{2}x=arccos(\frac{2}{3})+2k\pi$

Multiply both sides by 2:

$x=2arccos(\frac{2}{3})+4k\pi$

or

$-\frac{1}{2}x=arcos(\frac{2}{3})+2k\pi$

Multiply both sides by -2:

$x=-2arccos(\frac{2}{3})-4k\pi$

So we can say the solution is:

$x=\pm 2arcos(\frac{2}{3})+4k\pi$

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3 years ago

Add the opposite 3-2=1

liberstina [14]

Answer:

-1

Step-by-step explanation:

The opposite of 1 is -1 which makes it -1

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What is 3(u-16)+13=19 what does u equal

Yuliya22 [10]

U would equal to 18.

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3 years ago