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3 years ago

Jane drives at a constant rate of 45 miles per hour for 4 hours. How far will she have traveled in that time?

Mathematics

1 answer:

bearhunter [10]3 years ago

6 0

180 miles per hour. 45*4 to get the answer.<span />

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Hope this helped! I’d appreciate brainless answer!

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3 years ago

32. Solve the equation below.<br> 12-13<br> = 17

Helga [31]

12-13
12-13=-1
Therefore the equation is false.

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3 years ago

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What is y= - |x+2| -10

nata0808 [166]

Answer:

y=x-12

Step-by-step explanation:

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3 years ago

-4/9n ÷ 1/15n please help w/explanation and step by step

Sindrei [870]

Answer:

-20n/3n

Step-by-step explanation:

-4 1

--- / ---

9n 15n

Keep, change, flip

- Keep the -4/9n

- Change the division sign to a multiplication sign

- Flip the 1/15n to 15n/1

-4 15n

--- * ---

9n 1

Cross simplify.

9n divided by 3 is 3n.

15n divided by 3 is 5n.

-4 5n

--- * ---

3n 1

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3n times 1 equals 3n

-20n

---

6 0

3 years ago

The height h in feet of a ball thrown vertically upward from the top of a 288-foot tall building is given by h=288+48t-16t^2 whe

mr Goodwill [35]

6 sec can take penny to strike the ground.

Solution:

Given data:

$H_0=288$ feet

$V_0=48$ feet

$h(t)=288+48t-16t^2$

Re-arrange the terms from greatest degree to smallest degree.

$h(t)=-16t^2+48t+288$

We can solve it by applying quadratic formula,

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

Here a = –16, b = 48, c = 288

$$t=\frac{-48\pm \sqrt{48^2-4(-16)(288)}}{2(-16)}$

$$t=\frac{-48\pm \sqrt{2304+18432}}{-32}$

$$t=\frac{-48\pm \sqrt{20736}}{-32}$

$$t=\frac{-48\pm144}{-32}$

Now, write find two t's using plus and minus operation.

$$t=\frac{-48+144}{-32},\ \ t=\frac{-48-144}{-32}$

$$t=\frac{96}{-32},\ \ t=\frac{-192}{-32}$

t = –3 (or) t = 6

We cannot write time is negative. so neglect t = –3.

Therefore t = 6.

Hence 6 sec can take penny to strike the ground.

8 0

3 years ago