PLLLLLEEEEAAAASSSSEEEEEEEE HEEEEEELLLLP MMEEEEEEEEEEEE WILL AWARD BRAINLIEST IF HELPED

Mathematics

2 answers:

RSB [31]3 years ago

4 0

It’s a cool shape. Reminds me a flash.

OLga [1]3 years ago

4 0

I’m pretty sure it’s just reflected across the x axis. then reflected across the y axis. then translated.

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A circle has a diameter of 121 inches. Which equation can be used to find the radius of this circle? r=121/2π r=1/2(121) r=121π

drek231 [11]

The radius of a circle is always half its diameter.

Therefore the radius of a circle with a diameter of 121 inches is 1/2(121).

Hence, the correct answer is r = 1/2 (121)

8 0

4 years ago

Read 2 more answers

Is the ordered pair pair (-3, 2) a solution to the equation 5x + 2y = -11? Show your work?

Musya8 [376]

Yes
5x+2y=-11
5(-3)+2(2)=-11
-15+4=-11

7 0

4 years ago

I don’t understand this.. <br> will someone please help? Will mark Brainliest along with 20 points.

inn [45]

To say two quantities $a$ and $b$ "vary directly" with one another means that a change in one of the quantities results in a proportional change in the other quantity. For example, if $a=2b$ , then $b$ is proportional to $a$ by a factor of 2, or $a$ is proportional to $b$ by a factor of 1/2. In other words, if you change $b$ by some fixed amount, then $a$ changes by double that amount.

Mathematically this means there is some constant scaling factor $k$ such that $a=kb$ . In question 4, we're told $f(x)$ varies directly with $x^2$ , which means there's some $k$ such that

$f(x)=kx^2$

We're given that $f(x)=40$ when $x=2$ , so

$40=k\cdot2^2\implies40=4k\implies k=10$

Then when $x=5$ , we get

$f(5)=10\cdot5^2=10\cdot25=250$

- - -

For $a,b$ to "vary inversely" with one another means that a change in one quantity results in an "opposite" change in the other. In other words, if $a$ increases, then $b$ decreases, and vice versa.

Mathematically, this is the same as saying there is some fixed number $k$ such that $ab=k$ .

For example, if $k=1$ and we start with $a=1$ , then $b=1$ also. If we change to $a=2$ , then $b=\dfrac12$ ; if $a=10$ , then $b=\dfrac1{10}$ , and so on.