The last 2 questions & did I do it right pls help me:(

Mathematics

2 answers:

iren [92.7K]3 years ago

3 0

Answer:

Step-by-step explanation:

a. 50x+200

b. 200

c. 50

d. y intercept - the cost to buy the phone

e. slope represents number of months that you have the phone plan

Fynjy0 [20]3 years ago

3 0

I think you have your equation wrong. It should be 5x+200. 200 is paid once while the five is paid every month. So 200 is the y-intercept and it stands for the purchase of the phone. The slope is how much you’re paying each month!

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Let a be the vector of length 125 that when drawn in standard position makes a 144° angle with the positive x-axis. Let b be the

umka2103 [35]

Answer:

The length is 90.033 and the angle that v makes with the positive x-axis is 153.339°

Step-by-step explanation:

Firstly we will have to convert our given vectors to their rectangular Cartesian vector form as follow,

$a=125(icos(144)+jsin(144))=-101.127i+73.473j\\b=39(icos(302)+jsin(302))=20.667i-33.074j$

Now that we have these, we can add them to obtain v as follows,

$v=a+b\\v=-80.46i+40.399j$

Now that we have the Cartesian vector form we can calculate its length and its direction with respect to the positive x-axis as follows(In fact we usually refer the angles from the positive x-axis),

$|v|=\sqrt{80.46^{2}+40.399^{2}}=90.033\\ angle(v)=tan^{-1}(40.399/(-80.46))=153.339$