Use the substitution method to solve the system of equations. Choose the correct ordered pair. y=6x-4 y=7x-7
1 answer:
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Answer:
The number of the students is 20.
Step-by-step explanation:
Total number of students in the speech contest = 90
Number of students that gave their speeches yesterday = of 90
= x 90
= 60
Number of remaining students who have not given their speeches after the first day = 90 - 60
= 30
Number of students that gave their speeches today = of 30
= x 30
= 10
Number of students that have not given their speeches = 30 - 10
= 20
Thus, 20 students have not given their speeches.
Looking at the picture below (where the blue line is the height and the red line is equal to 43), we see that we can use the trigonometric ratio tan.
tan38=x/43
which simplifies to
43*tan38=x
which gets us that x=33.6 (approximately)
:)
tan38=x/43
which simplifies to
43*tan38=x
which gets us that x=33.6 (approximately)
:)