<span>We know that the runner completed her first race in 17.8 seconds and that she completed her second race in 16.9 seconds. Then the difference between the first race and the second race is .9 seconds. Now we divide .9 by 17.8 and multiply by 100 to get the percent decrease. We get 5.06%. The percent decrease in her time is 5%.</span>
What she said hope that helps
Let A be attendance, t the temperature and n the number of days. Then,
A


A=k

Where k is a constant of proportionality;
If A=3200, T=88 and n=8, then k,
3200=

3200=11k
k=

Rewriting the equation and replacing the value of k,
A=

When t=92 and n=12
The A=

A=

A= 2231
B
rearrange into standard form : ax² + bx + c = 0 (a≠ 0)
2x² - 3x - 2 = 0
(x - 2)(2x + 1) = 0 ( equate each factor to zero and solve for x )
x - 2 = 0 ⇒ x = 2
2x + 1 = 0 ⇒ x = - 0.5
B. 6, -3
2(6) + 2(-3) = 6
12 - 6 = 6
True
hope this helps