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never [62]
3 years ago
8

A cell phone company charges $40 per month for unlimited calling, and $0.20 per text message sent. If t represents the number of

text messages Roxy sent last month, which expression represents the cost of her bill last month before any taxes or additional fees?40 − 0.2t
(40 + 0.2)t
40 + 0.2t
(40 − 0.2)t
Mathematics
1 answer:
sergejj [24]3 years ago
4 0

Answer:

Step-by-step explanation:

40 per month + 0.20 per text(t)

40 + 0.2t....no parenthesis needed

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2. David determines that 3 sqrt 2 cis(7pi/4) = -3+3i. When he considers the graphical representation of these numbers, he knows
fiasKO [112]

The correct rectangular equivalence of 3sqrt(2)·cis(7pi/4 ) is:

3sqrt(2)·cos( 7pi/4 ) + i·sqrt(2)·sin( 7pi/4 )  =  3 - 3i.

<h3>Where did David go wrong?</h3>

David mistakenly interchanged the Sin function and the Cos function when he was calculating the problem.

Hence the correct rectangular equivalence is:

3sqrt(2)·cos( 7pi/4 ) + i·sqrt(2)·sin( 7pi/4 )  =  3 - 3i.

<h3>What is rectangular equivalence?</h3>

An equation is rectangular in form when it is comprised of Variables like X and Y and can be represented on a Cartesian Plane.

Learn more about rectangular equivalence at:
brainly.com/question/27813225
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5 0
2 years ago
43 1/3 rounded​ to the nearest whole number
lutik1710 [3]
Rounded to the nearest whole number is still 43
6 0
3 years ago
Read 2 more answers
West of Checkpoint A, which is at (0,5), are two hurdles that Helena needs to jump over. Hurdle 1 is 4 units west of Checkpoint
elixir [45]

Answer:

Checkpoint B = (-9,5)

Step-by-step explanation:

Here is an image of the graph and coordinates.

4 0
3 years ago
What is 6ft to 4 yards as a fraction in simplest form
Vesna [10]
1yard =3ft so 》 6ft/4×3ft=6/12=1/2
3 0
4 years ago
How many times smaller is a group of 4 coins than a group of 16 coins?
likoan [24]

Answer:

4 times.

Step-by-step explanation:

16/4 = 4.

Hope this helped!

8 0
3 years ago
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