If a represents a vector two units in length directed due west, b represents a vector three units in length directed due north and a+b=c-d and 2b-a=c+d.
find the magnitudes and directions ofc and d.

Step-by-step explanation:

Given

Vector A has two units in length due to west i.e.

Vector B has one unit in length due to North i.e.

Also

i.e.

also

i.e.

From 1 and 2

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.