3 years ago

Select all the system of equations that have exactly one solution

Mathematics

1 answer:

Mariana [72]3 years ago

8 0

Answer:D

Step-by-step explanation:

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It is a rational number

Step-by-step explanation:

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Which two expressions are equivalent?

MariettaO [177]

Answer:

First option

Step-by-step explanation:

The result of first expression:

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7(6+z) = 42 + 7z

the result of second expression:

since we need to do multiplying first,

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then we add them

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2 years ago

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3 years ago

Super Super dumb Easy question lol<br> Does this count as an equation 60.50 × .20 = x

xxTIMURxx [149]

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3 years ago

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What is the amplitude, period, and phase shift of y= 5cos( x/2 + 2pi/3)

nordsb [41]

Y = A cos(Bx + C)
A - amplitude
$\frac{2\pi}{B}$ - period
$- \frac{C}{B}$ - phase shift

$y=5\cos{( \frac{x}{2} + \frac{2\pi}{3} )}
\\
\\y=5\cos{( \frac{1}{2}x + \frac{2\pi}{3})}
\\
\\A=5,B= \frac{1}{2},C= \frac{2\pi}{3}$

Amplitude: 5
Period: $\frac{2\pi}{B}=\frac{2\pi}{\frac{1}{2}}=4\pi$
Phase shift: $- \frac{C}{B} =- \frac{\frac{2\pi}{3}}{\frac{1}{2}}= -\frac{4\pi}{3}$

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3 years ago