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muminat
3 years ago
10

PLEASE HELP ME!! I WILL MARK BRAINIEST

Mathematics
1 answer:
Zepler [3.9K]3 years ago
5 0

Answer:

Answer is 12 i think.

Step-by-step explanation:

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If a rock falls from a height of 40 meters on Earth, the height H (in meters) after x seconds is approximately
Julli [10]
Once the rock hits the ground, we know that its height will be equal to 0m
because of this, we can replace H(x) with 0
40 - 4.9 {x}^{2}  = 0
now all we have to do is get x by itself
so..
4.9 {x}^{2}  = 40
then
{x}^{2}  = 40 \div 4.9
{x}^{2}  = 8.1632...
now take the square root of each side
x = 2.857...
2.857 seconds (rounded to the third decimal)

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3 years ago
The school student council sponsor a switch day where students were able to switch classes every 20 minutes the students are in
djyliett [7]
60*7=420/20=21 the anwser is 21 
8 0
3 years ago
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HELP PLEASE ill give tons of poitns and brainlist
andre [41]

Answer:

x = 3.4

Step-by-step explanation:

Given the graphs of 2 functions, then the solutions to both are at their points of intersection, that is

where f(x) = g(x)

There are 3 possible points of intersection to f(x) = g(x)

The one on the list , however, is at x = 3.4

7 0
3 years ago
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Tell whether the lines for each pair of questions are parallel or perpendicular or neither y=5/3x+3. 20x+12y=12
disa [49]

neither

• Parallel lines have equal slopes

• The product of perpendicular slopes = - 1

the equation of a line in slope-intercept form is

y = mx + c ( m is the slope and c the y-intercept )

y = \frac{5}{3} x + 3 is in this form

with slope m = \frac{5}{3}

rearrange 20x + 12y = 12 into this form

subtract 20x from both sides

12y = - 20x + 12 ( divide all terms by 12 )

y = - \frac{5}{3} + 1 ← in slope-intercept form

with slope m = - \frac{5}{3}

Neither of the conditions for parallel/ perpendicular slopes are met

Hence the lines are neither parallel/ perpendicular


8 0
3 years ago
A bag contains white marbles and green marbles, 108 in total. The number of white marbles is 6 more than 5
sweet-ann [11.9K]

27.6

108/5= 21.6+6= 27.6

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3 years ago
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