(14х + 7) — (— 3х + 2) simplify problem. Please answer I’m confused
1 answer:
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The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
<u>Step-by-step explanation:</u>
Here we have , Twenty-eight athletes participate in a 100-meter race. The time of each athlete is measured during the qualification round. The average time is 11 seconds. The 8 athletes with the fastest time qualified for the final. The average time of these 8 athletes is 10.5 seconds. Let's have equations for this:
where
are athletes
⇒
⇒
⇒
⇒ , where m is average time of the 20 athletes who did not qualify for the final.
⇒
⇒
⇒
∴ The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
Answer:
(7, -4)
Step-by-step explanation:
We need to check the ordered pairs for x = -2, x=5, x= 2/3 and x = 0.75.
1. For the first function: y = 9-4x
x=-2
The ordered pair is (-2,17).
x = 5
The ordered pair is (5,-11).
x = 2/3
The ordered pair is (2/3, 19/3)
x = 0.75