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Lunna [17]
4 years ago
13

True or false: The function f(x) = 3/x + 7x a polynomial

Mathematics
1 answer:
Kay [80]4 years ago
8 0

Answer:

true

Step-by-step explanation:

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The height h of an arrow in feet is modeled by h(t) = -16t^2 + 63t +4, where t is the time in seconds since the arrow was shot.
FinnZ [79.3K]
If the arrow is in the air, then when it hits the ground, h(t)=0. So:
0=-16t²+63t+4
16t²-63t-4=0
(16t+1)(t-4)=0
t= -1/16 or 4
Using the positive result of 4, we get t=4 seconds as the time the arrow was in the air
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6 0
3 years ago
Hi:) anyone able to explain this formula? Thanks!
stealth61 [152]

Answer:

Step-by-step explanation:

This basically the general formula of Slope point form for the linear equation.

Defining the slope of the line and a point on the line (not actually the y-intercept)

(x1,y1) = Point on the line

m = slope on the line

3 0
3 years ago
The formula F = 1.8C + 32 is used to convert temperatures from degrees Celsius, °C, to degrees Fahrenheit, °F. Find the temperat
lapo4ka [179]

Answer:

68F

Step-by-step explanation:

Given data

The formula F = 1.8C + 32

we want to find F for C= 20°C

Substitute into the formula we have'

F = 1.8(20) + 32

F=36+32

F=68

Hence the value of 20°C in Fahrenheit is 68F

3 0
3 years ago
Work out the percentage increase of 42 to 186.
Elza [17]

Answer:

 342.85714 %

Step-by-step explanation:

Percentage increase is  given by

 increase= (new - original)/ original * 100 %

The new is 186 and the original is 42

                = (186 - 42)/ 42 * 100 %

                 =144/42* 100 %

                 =3.42857 * 100%

                   =342.85714 %

7 0
3 years ago
How to classify a system and give the number of solutions
Leokris [45]
1) consistent system. at least one solution.

2) inconsistent system. no solutions (the lines are parallel)

3) dependent system. equations have same slope and y-intercept(same line)independent system.

4) equations have different slopes(2 intersecting lines)

im not sure if thats what you were looking for

3 0
3 years ago
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