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Nata [24]
3 years ago
13

Help plssss I’m trying to finish this diagnostics test

Mathematics
1 answer:
Allushta [10]3 years ago
4 0

Answer: 5 Seconds

Step-by-step explanation: Given the equation of the height expressed ad;

h(t) = - 16t^2 + initial height

Given that initial height = 400feet

h(t) = - 16t^2 + 400

The waste will hit the ground at when h(t) = 0

substitute

0 =  - 16t^2 + 400

16t^2 = 400

t² = 400/16

t² = 25

t = √25

t = 5secs

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Write an equation for a line that passes through the points (0,-4) and (1,3)
stich3 [128]
We can actually make two equations here, slope-intercept form and point slope form. Firstly, we need to find the slope. We do that by finding the difference of the y coordinates, and then dividing that by the difference of the x coordinates. 3-(-4)/1-0 is 7. Our slope is 7, slope is m.

Point slope form is y - y1 = m(x - x1). We only need to worry about y1 and x1. Let’s plug our x and y values in. y - (-4) = 7(x - 0). Next, we should simplify this. y + 4 = 7x. Next, we need to isolate y. We do this by subtracting four from both sides. y = 7x - 4

Our point slope form equation is y - (-4) = 7(x-0), and our slope-intercept form is y = 7x - 4. Keep in mind that 7 is our slope, or m, and -4 is our y-intercept.
3 0
3 years ago
Sunny earns $12 per hour delivering cakes. She worked for x hours this week. Unfortunately, she was charged $15 for a late deliv
Aleksandr [31]

Answer:

-3

Step-by-step explanation:

Unless x has a number she owes them 3 dollars.

5 0
3 years ago
Calculates the total amount E, in dollars, that she earns for working h hours using the equation E = 10h
GrogVix [38]

So your equation is E=10h.

We know E is equal to 1 so let's plug that is.

1=10h

Now we just solve it.

1=10h    Divide each side by 10

.1=h

Boom!

She has to work .1 hours or 1/10 of an hour to earn 1 dollar.



Hope I helped!

7 0
3 years ago
What was the original price if after increasing by 60% it became $8?
Nesterboy [21]
The answer  is 5a pretty sure
8 0
3 years ago
How to find lateral surface area of a cylinder with with demotions of h=12 and r=2
nordsb [41]
It's 150.8
If you ever need to find that, type into google "surface area of ____"
3 0
3 years ago
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