All categories

3 years ago

How do I solve for y: 2 + y = -7 + 2y

Mathematics

2 answers:

In-s [12.5K]3 years ago

6 0

Answer:

2 + y = -7 + 2y

collect like terms

y-2y=-7-2

-y=-9

y=9

Step-by-step explanation:

Kobotan [32]3 years ago

4 0

Answer:

y=9

Step-by-step explanation:

2+y=-7+2y

2=-7+2y-y

2=-7+y

y=2-(-7)

y=2+7

y=9

You might be interested in

Which graph shows a linear relationship?

PilotLPTM [1.2K]

Answer:

Graph C

Step-by-step explanation:

Graph C shows a linear relationship

5 0

3 years ago

Read 2 more answers

Consider the system of equations.

Harman [31]

The solution to the system of equations x + 2y = 1 and -3x-2y = 5 is:

x = -3, y = 2

The given system of equations:

x + 2y = 1............(1)

-3x - 2y = 5..........(2)

This can be written in matrix form as shown:

$\left[\begin{array}{ccc}1&2\\-3&-2\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]$

Find the determinant of $\left[\begin{array}{ccc}1&2\\-3&-2\end{array}\right]$

$\triangle = 1(-2) - 2(-3)\\\triangle = -2+6\\\triangle = 4$

$\triangle_x = \left[\begin{array}{ccc}1&2\\5&-2\end{array}\right]\\\triangle_x = 1(-2)-2(5)\\\triangle_x = -2-10\\\triangle_x =-12$

$\triangle_y = \left[\begin{array}{ccc}1&1\\-3&5\end{array}\right]\\\triangle_y = 1(5)-1(-3)\\\triangle_y = 5 + 3\\\triangle_y =8$

$x = \frac{\triangle_x}{\triangle} \\x = \frac{-12}{4} \\x = -3$

$y = \frac{\triangle_y}{\triangle} \\y = \frac{8}{4} \\y = 2$

The solution to the system of equations x + 2y = 1 and -3x-2y = 5 is:

x = -3, y = 2

Learn more here: brainly.com/question/4428059

3 0

3 years ago

3.52 in expanded form

Scrat [10]

Step-by-step explanation:

3.52 =

+ 0.5

+ 0.02

hopes this helps you

6 0

2 years ago

Which of the purchases would be the least expensive? Purchase Amount of sale Sales tax rate A $150 5% B $145 7% C $140 8% D $135

Lera25 [3.4K]

Answer:

It is d

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Suppose the auction house from the preceding problem sold 200 tickets at $1 each, and had 16 prizes of $10 each. What is the new

Brilliant_brown [7]

200/160=1.25

200+160=360/1.25/160=200.8

so your answer is 0.8

4 0

3 years ago