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3 years ago

BRAINLIEST!!PLEASE HELP ME!

Mathematics

2 answers:

Andru [333]3 years ago

8 0

Easiest way I could think of is choose a point in the gray area and use the X,Y to plug into the answers whichever one makes sense is correct.

DiKsa [7]3 years ago

8 0

The answer is b I just graphed it on Desmos

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Pleaseeeee help is it -2 or 16 btw it’s geometry and it needs to be counterexample

Yakvenalex [24]

Answer:

false

Step-by-step explanation:

x can be equal to 2 or -2 since square root of a number can't be negative

4 0

3 years ago

A jug contains some orange juice. After pouring 240 milliliters of the orange juice into a cup, there are 875 milliliters of ora

zubka84 [21]

Answer:

1,115 mL

Step-by-step explanation:

The original amount of OJ is what we're trying to find, so that will be our variable, x. Now, keep in mind the order of events to write the correct equation. We started with the x amount of OJ, then 240 mL was taken away, to leave us with 875 mL. So, x - 240 = 875. Then we solve this by adding 240 to both sides to get the x alone. This gives us x=1,115 mL!

4 0

3 years ago

3 = −2∣ 1 — 4 s − 5 ∣ + 3

artcher [175]

Answer:

s=1

Step-by-step explanation:

3=-2(1-4s-5)+3

3=-2+8s+10+3

3=8s+11

3-11=8s

8=8s

8/8=s

s=1

hope it helps you!!

3 0

3 years ago

How can you tell if a set of bivariate data shows a linear relationship?

Anastasy [175]

<span>It introduces the relationship between two variables and is called correlation. Proportionality or variation is state of relationship or correlation between two variables It has two types: direct variation or proportion which states both variables are positively correlation. It is when both the variables increase or decrease together. On the contrary, indirect variation or proportion indicates negative relationship or correlation. Elaborately, the opposite of what happens to direct variation. One increases with the other variables, you got it, decreases. This correlations are important to consider because you can determine and identify how two variables relates with one another. Notice x = y (direct), y=1/x (indirect)
</span>

5 0

3 years ago

Solve this differential equation using power series and indicial roots about (0,0):

Ivanshal [37]

Let $y=\displaystyle\sum_{k\ge0}a_kx^k$ , so that

$y'=\displaystyle\sum_{k\ge1}ka_kx^{k-1}$
$y''=\displaystyle\sum_{k\ge2}k(k-1)a_kx^{k-2}$

Substituting into the ODE gives

$\displaystyle3x\sum_{k\ge2}k(k-1)a_kx^{k-2}+6\sum_{k\ge1}ka_kx^{k-1}+\sum_{k\ge0}a_kx^k=0$
$\displaystyle3\sum_{k\ge2}k(k-1)a_kx^{k-1}+6\sum_{k\ge1}ka_kx^{k-1}+\sum_{k\ge0}a_kx^k=0$

The first series starts with a linear term, while the other two start with a constant. Extract the first term from each of the latter two series:

$\displaystyle6\sum_{k\ge1}ka_kx^{k-1}=6\sum_{k\ge2}ka_kx^{k-1}+6a_1$
$\displaystyle\sum_{k\ge0}a_kx^k=\sum_{k\ge1}a_kx^k+a_0$

Finally, to get the series to start at the same index, shift the index of the first two series by replacing $k$ with $k+1$ . Then the ODE becomes

$\displaystyle3\sum_{k\ge1}k(k+1)a_{k+1}x^k+6\sum_{k\ge1}(k+1)a_{k+1}x^k+\sum_{k\ge1}a_kx^k+6a_1+a_0=0$

which can be consolidated to get

$\displaystyle\sum_{k\ge1}\bigg[(3k(k+1)+6(k+1))a_{k+1}+a_k\bigg]x^k+6a_1+a_0=0$
$\displaystyle\sum_{k\ge1}\bigg[3(k+1)(k+2)a_{k+1}+a_k\bigg]x^k+6a_1+a_0=0$

You're fixing the solution so that it contains the origin, which means

$y(0)=\displaystyle\sum_{k\ge0}a_kx^k=a_0=0$

which in turn means $a_1=0$ . With the given recurrence, it follows that $a_k=0$ for all $k\ge2$ , so the solution would be $y=0$ . This is to be expected, since $x=0$ is clearly a singular point for the ODE.

8 0

3 years ago