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2 years ago

Explain why this means that 251/2=5

Mathematics

2 answers:

8_murik_8 [283]2 years ago

7 0

It’s 251 divided by 2 equals 5

Rashid [163]2 years ago

7 0

251➗2=5

I think?

Or it could be ?? ⬇️

Times and then just find the x or not??

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X^2 - y^2 = 100

luda_lava [24]

Answer:

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

$x+y=5$

Subtract y from both sides:

$x=5-y$

Now, substitute "5-y" for "x" in the first equation:

$(5-y)^2-y^2=100$

Note that:

$(a-b)^2=a^2-2ab+b^2$

$25-10y+y^2-y^2=100$

Cancel out like terms:

$25-10y=100$

Subtract 25 from both sides:

$-10y=75$

Divide both sides by -10

$y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}$

Now, substitute this value back into either of the equations to solve for x.

$x+y=5\\x-\frac{15}{2}=5\\$

Add 15/2 to both sides:

$x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}$

Now, find the difference:

$x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20$

8 0

2 years ago

Explain when a relation is also a function

nordsb [41]

Answer:

A relation is a function if the x-values map to only one y-value. In other words, if a relation is one-to-one or many-to-one it is a function.

Step-by-step explanation:

4 0

3 years ago

Solve question 13. And 14. Please!! Will reward brainliest!!

SIZIF [17.4K]

Answer:

y = 4 sin( 0.5t - $\frac{4\pi }{3}$ ) - 2

y = a sin ( 2t - $\frac{-\pi }{3}$ ) + 2

Step-by-step explanation:

In the first question,

amplitude = 4

Period = $4\pi$

phase shift = $\frac{-4\pi }{3}$

Vertical shift = -2

Angular velocity , w = $\frac{2\pi }{time period}$

Here, w = $\frac{2\pi }{4\pi }$ = 0.5

The general equation of a wave is

y = a sin( wt + ∅ )

Putting above values in the equation,

y = 4 sin( 0.5t - $\frac{4\pi }{3}$ ) - 2

In the second question,

Amplitude is not given so we will take it as a.

time period = $\pi$

w = 2

Phase shift = $\frac{-\pi }{3}$

Vertical shift = 2

The equation is

y = a sin ( 2t - $\frac{-\pi }{3}$ ) + 2

5 0

3 years ago

Can anyone tell me who danink 662 is and how do you know him

neonofarm [45]

Answer:

He is a person with a profile on brainly. And I do believe that I have him as one of my friends*

*or not :)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is the nearest thousand, hundreds, tens for 7931

photoshop1234 [79]

To the nearest thousand, it is 8,000
To the nearest hundred, it is 7,900
To the nearest ten, it is 7,930

Hope that helped :)

3 0

3 years ago