Hello, i need some help, thanks <3

Mathematics

2 answers:

Softa [21]2 years ago

8 0

Answer:

Step-by-step explanation:

The whole thing is wrong

31 - 12 = x

X = 19

Hope this helped thanks.

OleMash [197]2 years ago

6 0

Answer:

Melody added 12 to both sides when she should've subtracted 12 from both sides.

X = 19

Step-by-step explanation:

When solving equations, you have to do the opposite operation given on both sides of the equation. In this case, the operation that's happening is addition, so we have to <u>subtract</u> 12 from both sides.

Step 1: Subtract 12 from both sides.

$x+12-12=31-12$
$x = 19$

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The symphonic choir and the jazz choir are recording songs for an album. The album can be no more than 72 minutes long. The jazz

zimovet [89]

Answer:

The symphonic choir can record a maximum of 14 songs.

Step-by-step explanation:

We know that the album cannot be more than 72 minutes long, and the jazz choir records a total of $7 (3min) = 21$ song minutes.

If we call $c$ the number of songs the symphonic choir records , and each song is 3.5 minute long, then the song minutes for the symphonic choir are $3.5c$ ; therefore, we have the inequality

$3.5c+21\leq 72$ <em> (this says the song minutes for jazz choir plus song minutes for symphonic choice cannot exceed 72 minutes )</em>

We solve this inequality by subtracting 21 from both sides and then dividing by 3.5:

$3.5c\leq 51$

$c\leq \frac{51}{3.5}$

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