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emmasim [6.3K]
3 years ago
13

A ball is thrown from a height of 40 meters with an initial downward velocity of 5 m/s

Mathematics
1 answer:
arsen [322]3 years ago
7 0

0=40-10t-5t^2

t^2+2t-8=0

(t+4)(t-2)=0

t=-4 (not a solution) or t=2

Answer: after 2 seconds

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A digital camera for 249.99 at 4% sales tax
spin [16.1K]
First round up 249.99 to 250.00

Then change the 4% into a decimal= 1.04 

Now multiply so the equation is= 250 x 1.04 =

$260 as your answer!

4 0
3 years ago
-1.1x + 8.1x + 38 = -32
Setler79 [48]

X = -10

Explanation:

-1.1x + 8.1x + 38 = -32

Combine like terms : -1.1x + 8.1x

7x + 38 = -32

Subtract 38

7x = -70

Divide by 7

7x = -70/7

Answer:

x = -10

8 0
2 years ago
Read 2 more answers
EXPERTS/ACE/GENIUSES/TRUSTED HELPERS HELPP!!
noname [10]
Hi,

The answer to your question is either A or B. 

The y-intercept is at point (0,60). All the other options (C and D) do not make sense and just aren't logically. 

The y-intercept (0,60) literally shows that if a student studies 0 hours they can expect to score a 60 on the test. 

Thus, you're answer is option B. 


Faith xoxo
7 0
3 years ago
Read 2 more answers
. Curt is installing a picket fence around his garden which is 45.45 ft by 14.63 ft. When he gets to the hardware store he finds
Dmitriy789 [7]
The fence must have two sides of length 45.45 ft and two sides of length 14.63

To cover each of 45.45 ft long side, he will need 45.45 /  2 = 22.7 slats which approximates to 23. So, they are 2 * 23 = 46 slats.

To cover each of 14.63 ft sides, he will need 14.63 / 2 = 7.3 which approximates to 8 (to not leave any spaces between each slat). So, they are 2 * 8 = 16 slats.

That makes 46 + 16 = 62 slats.

Answer: around 62 slats.
5 0
3 years ago
How do I solve -5 - (15y - 1) = 2 (7y - 16) - y
Aleks [24]
If you want to solve the equation -5 - (15 * y - 1) = 2 * (7 * y - 16) - y, you can calculate this using the following steps:

-5 - (15 * y - 1) = 2 * (7 * y - 16) - y
-5 - 15 * y + 1 = 14 * y - 32 - y
-5 + 1 + 32 = 14 * y - y + 15 * y
28 = 28 * y    /28
y = 1

The result is 1.
6 0
3 years ago
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