3. Andre and Elena are solving this system of equations: y = 3x
y=9x – 30
- Andre's first step is to write: 3x = 9x - 30
- Elena's first step is to create a new system:
3y=9x
y = 9x - 30

Do you agree with either first step? Explain your reasoning.

Andre is correct

Step-by-step explanation:

Andre is correct because the two equations are equal to eachother since they are both equal to y. As for Elena, they seem like they're overcomplicating it. They could do it this way, but it's unnecessary so I think that Andre is more correct because they did it the easier way.

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

a is the right answer