IF YOU DO IT THEN YOU WILL GET BRAINLIEST! −9x+4y=6 9x+5y=−33 SOLVE FOR X AND Y

Mathematics

1 answer:

BigorU [14]4 years ago

7 0

Answer:

x = 2 y = 3

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

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How did he get this 1/2i ? I dont remember studying this definition in calc 1 neither calc 2!

Hitman42 [59]

The $i$ in the denominator is missing in the second expression. It should be

$\sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

This follows from

$e^{iat}=\cos at+i\sin at$
$e^{-iat}=\cos at-i\sin at$
$\implies e^{iat}-e^{-iat}=2i\sin at$
$\implies \sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

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If a runner was traveling with a velocity of 4 m/s north and had a displacement of 2500 m, how long was he running?

Mademuasel [1]

Answer:

625

Step-by-step explanation:

t= d/s

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3 years ago

M is the midpoint of JK. Find the coordinate of K. J = (9, -5) M = (5, -2)

IceJOKER [234]

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Step-by-step explanation:

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3 years ago

Kyle has three short straws, four medium straws, and six long straws. If he randomly draws two straws, one at a time without rep

ipn [44]

Before the first straw is drawn, there are three short straws and $3+4+6=13$ straws in all. Thus, the probability of drawing a short straw first is $\frac{3}{13}$ .

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Thus, the probability of both of these events occurring is $\frac{3}{13} \cdot \frac{1}{6} = \boxed{\frac{1}{26}}$ .