(s - 2)(2s - 12)<br><br><br> please helpppppppp

Rainbow [258]

Yes... a half is equal to 10/20 and 11/20 is greater than 10/20 so 11/20 is greater than a half

8 0

3 years ago

A person standing on the roof of a building throws a ball directly upward. The ball misses the rooftop on its way down andeventu

maria [59]

Answer:

a) V_avg = 32 ft/s

b) V_avg = -30 ft/s

c) See explanation

Step-by-step explanation:

Given:

- The displacement function is given:

S(t) = -16t^2 + 64t + 80

Find:

a. Find the balls average velocity between the time it was thrown and 2 seconds later

b. Find the ball’s average velocity between 2 and 4 seconds after it was thrown

c. What do the signs in your answers to parts (a) and (b) mean in terms of the direction of the ball’s motion?

Solution:

- The average velocity of an object is the displacement over time, and it is expressed as follows:

V_avg = ( S_2 - S_1 ) / dt

- Evaluate S(2), S(0), and S(4):

S(2) = -16*2^2 +64*2 +80

S(2) = 144 ft

S(0) = -16*0^2 +64*0 +80

S(0) = 80 ft

S(4) = -16*4^2 +64*4 +80

S(4) = 80 ft

- For part a. Compute V_avg:

V_avg = ( S(2) - S(0) ) / 2

V_avg = (144 - 80) / 2

V_avg = 32 ft/s

- For part b. Compute V_avg:

V_avg = ( S(4) - S(2) ) / 2

V_avg = (80 - 140) / 2

V_avg = -30 ft/s

- We see that the signs of the Velocity have changed. The coordinate axis up against gravity was chosen to positive. While a negative access is in favor of the gravity. Hence, from the signs we can see that the ball is going down towards ground in motion from t = 2 s to t = 4 s.

5 0

3 years ago

Please help me I am in desperate need!!1!!!

shusha [124]

First box should say “transformed two units left” or something like that

3 0

2 years ago

ITS been increased by 39%

Alenkasestr [34]

Answer:

Step-by-step explanation:

Let 'x' be the original price.

x + 39% of x = 197.38

x + 0.39 x = 197.38

1.39x = 197.38

x = 197.38/ 1.39

x = 142

6 0

3 years ago

Read 2 more answers

Please simplify the two expressions and tell me how to do number 9 please

alekssr [168]

For the first expression. move the like terms next to each other in the expression.

17c - 5c -3 + 5 Do -3 + 5
17c - 5c + 2 Pretend the c isn't there and do 17 - 5
12c + 2

For the second expression, pretend the b isn't there and do -12 + 10

8b -2b Now, do 8 - 2
6b

For number 9, you know that since the top of the rectangle is 20cm, the bottom should be too. You can then use the 6cm and 2cm to find out how much of the bottom is missing.

20 - (6 + 2) Add 6 and 2
20 - 8 Subtract
12

So, the base of the triangle is 12cm. The side of the rectangle tells you that the height of the triangle is 9cm. If you plug those numbers into the triangle area formula, you can find the area of the triangle.

1/2 (b x h) Plug in the numbers ( b = 12 , h = 9)
1/2 (12 x 9) Multiply 12 and 9
1/2 (108) Find half of 180
54

The are of the triangle is 54 $cm^{2}$ . Since you need the area of the rectangle minus the are of the triangle, you need the are of the rectangle. That can be found using l x w.

l x w Plug in the values (l = 9 , w = 20)
9 x 20 Multiply
180

Now, subtract the area of the triangle (54) from the area of the rectangle (180).

180 - 54 Subtract
126

The area of the shaded region is 126 $cm^{2}$ .

4 0

3 years ago

Read 2 more answers

(s - 2)(2s - 12) please helpppppppp