All categories

2 years ago

Help please I'm horrible at math. Please help!!

Mathematics

1 answer:

Nataly_w [17]2 years ago

4 0

Answer = 1/5 and 4
solved by middle term breaking

You might be interested in

Sketch the graph of each linear inequality y>-2x-2

andrezito [222]

Here you go ooooo oooo

8 0

3 years ago

Read 2 more answers

A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by ℎ = −16푡 ଶ+103푡+5 w

Liono4ka [1.6K]

Question:

A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by h(t)=-16t^2+80t+5, where t is measured in seconds. Write an equation to determine how long it will take for the ball to reach the ground.

Answer:

$t = 5.0625$

Step-by-step explanation:

Given

$h(t)=-16t^2+80t+5$

Required

Find t when the ball hits the ground

This implies that h(t) = 0

So, we have:

$0=-16t^2+80t+5$

Reorder

$-16t^2+80t+5 = 0$

Using quadratic formula, we have:

$t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}$

Where

$a = -16$ $b =80$ $c = 5$

So, we have:

$t = \frac{-80\±\sqrt{80^2 - 4*-16*5}}{2*-16}$

$t = \frac{-80\±\sqrt{6400 +320}}{-32}$

$t = \frac{-80\±\sqrt{6720}}{-32}$

$t = \frac{-80\±82.0}{-32}$

This gives:

$t = \frac{-80+82.0}{-32}$ or $t = \frac{-80-82.0}{-32}$

$t = \frac{2}{-32}$ or $t = \frac{-162}{-32}$

$t = -\frac{2}{32}$ or $t = \frac{162}{32}$

But time can not be negative.

So, we have:

$t = \frac{162}{32}$

$t = 5.0625$

<em>Hence, time to hit the ground is 5.0625 seconds</em>

3 0

2 years ago

german tiene 13 billetes en su bolsillo , algunos son de $2000 y otros de $5000 si en total German tiene $40.000 ¿Cuantos billet

Rufina [12.5K]

Answer:

hay 10 billetes de 2000

hay 4 billetes de 5000

Step-by-step explanation:

Planteamos las siguientes ecuaciones...:

x= billetes de 2000

y= billetes de 5000

ecuaciones :

1) x+y = 14

2) 2000x + 5000y =40000

despejamos primera ecuacion y remplazamos en segunda :

1) x= 14-y

2) 2000(14-y) + 5000y = 40000

28000- 2000y+5000y = 40000

3000y= 40000 - 28000

y= 4

reemplazamos este valor en primera ecuacion:

x+y = 14

x+ 4= 14

x= 10

ahora reemplazamo valor de X y valor de Y

2000(10) + 5000(4) =40000

40000 =40000

hay 10 billetes de 2000

hay 4 billetes de 5000

Espero que esto te ayude

8 0

3 years ago

What is the solution to the inequality |x-4|<3?

Salsk061 [2.6K]

|x-4| <3

=>. x-4<3 or -(x-4)<3

=>. x-4<3 or x+4>3

=>. x<7 or x>1

So solution is x>1 & x<7. =x€(1,7)

Hope it helps...

Regards,

Leukonov/Olegion.

5 0

3 years ago

Read 2 more answers

Solve by the quadratic formula x^2 = 6x-4

tresset_1 [31]

Answer:

x=3+√5 or x=3−√5

Step-by-step explanation:

6 0

3 years ago