What is the equation of the line shown?

What is indicated by arrowheads on a line

Molodets [167]

Arrowheads indicate that the line will continue traveling on a number line infinitely. In other words the line never ends.

7 0

3 years ago

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Tina practiced piano for 15 hours last month and 45 hours this month. Use multiplication to write a statement comparing the hour

Pani-rosa [81]

Answer: Hours by Tina practiced this month is 3 times the hours she practiced last month such that 15 x 3 =45 hours.

Step-by-step explanation:

Given : Duration of Tina practiced piano last month= 15 hours

Duration of Tina practiced piano this month= 45 hours

We can see 45 is a multiple of 15 such that $45=15\times3$

Therefore, Hours by Tina practiced this month is 3 times the hours she practiced last month such that 15 x 3= 45 hours.

6 0

3 years ago

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In order to solve the following system of equations by addition, which of the

Pavlova-9 [17]

Answer:

Multiply the top equation by -3 and the bottom equation by 2

Step-by-step explanation:

Given system of equations:

$\begin{cases}4x-2y=7\\3x-3y=15 \end{cases}$

To solve the given system of equations by addition, make one of the variables in both equations sum to zero. To do this, the chosen variable must have the same coefficient, but it should be negative in one equation and positive in the other, so that when the two equations are added together, the variable is eliminated.

To eliminate the variable y:

Multiply the top equation by -3 to make the coefficient of the y variable 6:

$\implies -3(4x-2y=7) \implies -12x+6y=-21$