Answer:
x = 10
Step-by-step explanation:
A triangle's angles add up to 180 degrees, so 180-90 (the right angle) is 90 degrees. That means that
4x+6+3x+14 = 90. Then we simplify so
7x + 20 = 90. Then we can subtract 20 from each side so
7x = 70. Then, we find that
x = 10.
Answer:
D:f(x) = x2 - 3x -10
Step-by-step explanation:
Sarah bought 3 first class tickets and 7 coach tickets.
Step-by-step explanation:
Given,
Number of people = 10
Total amount spent on tickets = $4830
Cost of each coach ticket = $270
Cost of each first class ticket = $980
Let,
x be the number of coach tickets
y be the number of first class tickets
According to given statement;
x+y=10 Eqn 1
270x+980y=4830 Eqn 2
Multiplying Eqn 1 by 270

Subtracting Eqn 3 from Eqn 2

Dividing both sides by 710

Putting y=3 in Eqn 1

Sarah bought 3 first class tickets and 7 coach tickets.
Keywords: linear equation, elimination method
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Answer: I’m pretty sure it’s c hope this helps
Step-by-step explanation: