Answer:
20mph
Step-by-step explanation:
because you have to divide 240 by 12 and the answer is 20
Answer:
true
Step-by-step explenation:
follow order of operations
5 -8/2 = 5 - (8/2)= 5-4= 1
Answer:
<h2>a) Average velocity = 278 units</h2><h2>b)
Instantaneous velocity at t = 7 seconds is 148 units</h2>
Step-by-step explanation:
a) Average velocity is the ratio of displacement to time.
We have
s(t) = t³ + t
t is in between 7 and 12
s(7) = 7³ + 7 = 350
s(12) = 12³ + 12 = 1740
Displacement = 1740 - 350 = 1390
Time = 12 - 7 = 5
Displacement = Average velocity x time
1390 = Average velocity x 5
Average velocity = 278 units
b) s(t) = t³ + t
Differentiating
v(t) = 3t² + 1
At t = 7
v(t) = 3 x 7² + 1 = 148 units
Instantaneous velocity at t = 7 seconds is 148 units
<em>The</em><em> </em><em>length</em><em> </em><em>is</em><em> </em><em><u>1</u></em><em><u>5</u></em><em><u> </u></em><em>metres</em><em>,</em><em>the</em><em> </em><em>width</em><em> </em><em>is</em><em> </em><em><u>9</u></em><em><u> </u></em><em><u>m</u></em><em><u>,</u></em><em><u>and</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>area</u></em><em><u> </u></em><em>is</em><em> </em><em><u>1</u></em><em><u>3</u></em><em><u>5</u></em><em><u> </u></em><em>m</em>
<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em>
Step-by-step explanation:
Using the identity a² - b² = (a + b) (a - b)
=> (3 {p - q})² - (5 {q - r})²
=> [(3 {p - q}) + (5 {q - r})] [(3 {p - q}) - (5 {q - r})]
=> [(3p - 3q) + (5q - 5r)] [(3p - 3q) - (5q - 5r)]
=> [3p - 3q + 5q - 5r] [3p - 3q - 5q + 5r]
=> [3p + 2q - 5r] [3p - 8q + 5r]
