All categories

3 years ago

Please help, its easy im just slow i need it done in 10 mins please help

Mathematics

1 answer:

saul85 [17]3 years ago

3 0

Answer:they should have added 2 to 180, not 32

Step-by-step explanation:

You might be interested in

Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon

Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

$h(t)=-16t^2+40t+5$

we know that

When the ball hits the ground, the height is equal to zero

$-16t^2+40t+5=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$

is equal to

$t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^2+40t+5=0$

$a=-16\\b=40\\c=5$

substitute in the formula

$t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}$

$t=\frac{-40\pm\sqrt{1,920}} {-32}$

$t=\frac{-40+\sqrt{1,920}} {-32}=-0.12\ sec$

$t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec$

therefore

The solution is t=2.62 seconds

4 0

2 years ago

Select all the correct answers.

blsea [12.9K]

#4 a reflection across the x-axis is the only correct answer , the other ones aren’t correct .

7 0

2 years ago

How many lines of reflectional symmetry does the trapizoid have

inysia [295]

Is their an image to go along with this question ?

6 0

3 years ago

Find the inverse of y=log(-2x)

kodGreya [7K]

Answer:f

−

(

Step-by-step explanation:

5 0

2 years ago

Then nth term of a sequence is 10-4n list the first 3 terms

BabaBlast [244]

6, 2, -2 i could be wrong :/

7 0

3 years ago

Please help, its easy im just slow i need it done in 10 mins please help​

Please help, its easy im just slow i need it done in 10 mins please help