1) a number decreased by sixteen
2) twice a number subtracted by eight.
3) the difference of a number and twenty
4) the product of a number and seven, added to six.

1, x-16

2. 2x-8

3. x-20

4. 7x + 6

Step-by-step explanation:

when given the phrase 'a number' they mean they want you to replace that phrase with a variable. 'a number' decreased by 16 is simply x-16.

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: