3 years ago

Which algebraic expression represents “Marcus practiced the trumpet twice as long this week”?

Mathematics

1 answer:

Maksim231197 [3]3 years ago

8 0

Answer:

Step-by-step explanation:

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20 POINTS BRAINLIEST

docker41 [41]

Answer:

Step-by-step explanation:

Using the rule of logarithms

log x - log y = log( $\frac{x}{y}$ )

Given

$log_{7}$ ( $\frac{n}{2}$ )

= $log_{7}$ n - $log_{7}$ 2 → D

8 0

3 years ago

What is the solution to this system of linear equations?2x + y = 13x – y = –6(–1, 3)(1, –1)(2, 3)(5, 0)

worty [1.4K]

$\underline{+\left\{\begin{array}{ccc}2x+y=1\\3x-y=-6\end{array}\right}\ \ \ \ |\text{add both sides of equations}\\.\ \ \ \ \ 5x=-5\ \ \ \ |:5\\.\ \ \ \ \ \ x=-1\\\\\text{put the value of x to the first equation}\\\\2(-1)+y=1\\-2+y=1\ \ \ |+2\\y=3\\\\\text{Answer:}\ (-1,\ 3)$