Gracie drove 280 miles in 2.5 hours. How long will it take her to drive 710 miles at that same speed?
1 answer:
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Answer:
Step-by-step explanation:
Let's find the answer by using the arc length formula which is:
First, let's find dy/dx which is:
y=4x-5
y'=4*(1)-0
y'=4, now let's use the formula:
Now, using the distance formula we have:
So we have two points (-1, -9) and (3, 7) so:
Notice both equations gave the same length .
Answer:
Step-by-step explanation:
12a)To rationalize the denominator, multiply the denominator and numerator by √5.
b) (a+b)² = a² + 2ab + b²
(1 +√3)² = 1² + 2*1*√3 + (√3)²
= 1 + 2√3 + 3
= 4 + 2√3
a = 4 ; b =2
13) (a + b)(a - b) = a² - b²