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3 years ago

Which set of ordered pairs represents y as a function of x?

Mathematics

2 answers:

andrey2020 [161]3 years ago

8 0

D is the answer of this question

Harlamova29_29 [7]3 years ago

7 0

Answer:

the fourth choice

Step-by-step explanation:

this choice is the only one with no repeating input numbers (aka x values)

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Do all variable terms have a coefficient?

Maksim231197 [3]

technically yes because even if you have a variable of just x, there is still a coefficient of 1

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3 years ago

Simplify the expression

Reil [10]

Answer:453rft

Step-by-step explanation:

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3 years ago

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A steel ball is dropped from a building’s roof and passes a window, taking 0.125 s to fall from the top to the bottom of the win

Anna35 [415]

Answer:

20.425 m

Step-by-step explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{1.2-\frac{1}{2}\times 9.81\times 0.125^2}{0.125}\\\Rightarrow u=8.98\ m/s$

Now this will the final velocity when it reaches the top of the window

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{8.98^2-0^2}{2\times 9.81}\\\Rightarrow s=4.11\ m$

$v=u+at\\\Rightarrow v=8.98+9.81\times 0.125\\\Rightarrow v=10.21\ m/s$

If the upward flight is an exact reverse of the downward flight then the time taken while going down will be 1 second and going up will be 1 second.

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=10.21\times 1+\frac{1}{2}\times 9.81\times 1^2\\\Rightarrow s=15.115\ m$

Hence total height of the building is 4.11+1.2+15.115 = 20.425 m

4 0

3 years ago

Look at this picture and help ne with this question plz

Mars2501 [29]

The answer would be C

7 0

3 years ago

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Use SOHCAHTOA for this. Work out 'm' in 3sf, I need the working out.

Lady bird [3.3K]

Anwer:3.537m

STEP BY STEP EXPLANATIOND:using SOH CAH TOA

First find the opposite

Represent the opposite with x

Tan 33° =x\10

x=10Tan 33°

x=6.494

To find m

Sin 33°=m\6.494 Sin 33°

m=3.5368

m=3.537meteres

7 0

3 years ago