Diego is attending UTEP and has completed some courses worth 3 credits and some course worth 4 credits. he has earned a total of 59 credits after completing 18 courses. How many courses worth 4 credits has Diego completed

3 credit course = 13

4 credit course = 5

Step-by-step explanation:

Given that :

Total credits = 59

Total courses = 18

Let :

Number of 3 credit course = x ; number of 4 credit course = y

x + y = 18 - - (1)

3x + 4y = 59 - - - (2)

x = 18 - y

3(18 - y) + 4y = 59

54 - 3y + 4y = 59

54 + y = 59

y = 59 - 54

y = 5

x = 18 - 5

x = 13

3 credit course = 13

4 credit course = 5

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answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.