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1 year ago

What is the solution to the equation -4 (2x + 3) = 2x + 6 - (8x + 2)

Mathematics

1 answer:

jeka941 year ago

4 0

Answer:

x= -8 i believe

Step-by-step explanation:

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3|2z-4|-6>12<br> Solve for z

mina [271]

Answer:

312z-41-6>12

subtract -41-6

312z-47>12

add it on both sides

312z-47>12

+47 +47

312z>59

divide 312 to both sides

z<0.189

3 0

2 years ago

Find the exact value of cos(sin^-1(-5/13))

son4ous [18]

bearing in mind that the hypotenuse is never negative, since it's just a distance unit, so if an angle has a sine ratio of -(5/13) the negative must be the numerator, namely -5/13.

$\bf cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right] \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{then we can say that}~\hfill }{sin^{-1}\left( -\cfrac{5}{13} \right)\implies \theta }\qquad \qquad \stackrel{\textit{therefore then}~\hfill }{sin(\theta )=\cfrac{\stackrel{opposite}{-5}}{\stackrel{hypotenuse}{13}}}\impliedby \textit{let's find the \underline{adjacent}}$

$\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{13^2-(-5)^2}=a\implies \pm\sqrt{144}=a\implies \pm 12=a \\\\[-0.35em] ~\dotfill\\\\ cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right]\implies cos(\theta )=\cfrac{\stackrel{adjacent}{\pm 12}}{13}$

le's bear in mind that the sine is negative on both the III and IV Quadrants, so both angles are feasible for this sine and therefore, for the III Quadrant we'd have a negative cosine, and for the IV Quadrant we'd have a positive cosine.

8 0

2 years ago

Christian and Yong had some stickers in the ratio 2:3. After Yong gave Christian 15 stickers, the ratio became 5:7. What was the

Snezhnost [94]

Answer:

15:23

step-by-step explanation:

6 0

1 year ago

Can someone help me with this because I am struggling and if you don't mind show me the steps

Korvikt [17]

Attach and send a picture

3 0

2 years ago

After substituting, what is the first operation performed when evaluating 5 + (9 x minus 3) divide 2 for x = 5? addition multipl

ludmilkaskok [199]

Answer:

<h2>Multiplication.</h2>

Step-by-step explanation:

The given expression is

$5+(9x-3) \div 2$

For $x=5$ , we have

$5+(9(5)-3) \div 2$

Notice that the first operation we need to do is multiplication, because that's the right order of operations when we solve these kind of expressions.

$5+(45-3) \div 2$

Then, we subtract

$5+42 \div 2$

Now, we divide

$5+21$

Finally, we sum

$26$

Therefore, the right answer is multiplication.

4 0

2 years ago

Read 2 more answers