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3 years ago

Math question please help If you get this right I will mark you as a brainliest

Mathematics

1 answer:

nasty-shy [4]3 years ago

4 0

Txydjjdykvyxjc 4th you'd. it's C

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Solve. -6<3n+9<21 Thanks!

almond37 [142]

Answer:

the answer you are looking for is -5<n<4

5 0

2 years ago

Read 2 more answers

(-5i)(-3i) ASAP!!! Brainlest Solving quadratic equations Simply

yKpoI14uk [10]

Answer:

15i^2

Step-by-step explanation:

a negative times a positive is a negative and a negative times a negative is positive

-5×-3=15 and i×i=i^2

4 0

2 years ago

Calculating cos-1 ( help is gladly appreciated :) )

Alekssandra [29.7K]

Answer:

$\frac{3\pi}{4}$

(Assuming you want your answer in radians)

If you want the answer in degrees just multiply your answer in radians by $\frac{180^\circ}{\pi}$ giving you:

$\frac{3\pi}{4} \cdot \frac{180^\circ}{\pi}=\frac{3(180)}{4}=135^{\circ}$ .

We can do this since $\pi \text{ rad }=180^\circ$ (half the circumference of the unit circle is equivalent to 180 degree rotation).

Step-by-step explanation:

$\cos^{-1}(x)$ is going to output an angle measurement in $[0,\pi]$ .

So we are looking to solve the following equation in that interval:

$\cos(x)=-\frac{\sqrt{2}}{2}$ .

This happens in the second quadrant on the given interval.

The solution to the equation is $\frac{3\pi}{4}$ .

So we are saying that $\cos(\frac{3\pi}{4})=\frac{-\sqrt{2}}{2}$ implies $\cos^{-1}(\frac{-\sqrt{2}}{2})=\frac{3\pi}{4}$ since $\frac{3\pi}{4} \in [0,\pi]$ .

Answer is $\frac{3\pi}{4}$ .

4 0

2 years ago

The real part of the complex number –5 + 3i is

photoshop1234 [79]

Answer:

-5

Step-by-step explanation:

The real part of -5 + 3i is -5, and the imaginary part is 3.

7 0

2 years ago

GIVING BRAINLIEST! Solve for y: 3x - y = 14 Thank you~

ValentinkaMS [17]

To solve y, we need to make y the only value on the left hand side of the equation:

$3x - 3x - y = 14 \\ 3x - 3x - y = 14 - 3x \\ - y = 14 - 3x \\ y = - (14 - 3x) \\ y = - 14 + 3x$
Therefore the value of y = -14+3x.

Hope it helps!

8 0

3 years ago