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3 years ago

Plz answer question!!! will mark as brainliest if correct :D

Mathematics

1 answer:

adell [148]3 years ago

7 0

Answer:

Step-by-step explanation:

You can infer from the graph that, on average (which refers to mean), the scores in the post-test have increased in comparison to the scores on the pre-test.

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-4(x-4)=-44 Please answer this with how you got the answer.

devlian [24]

Answer: x = -15

Step-by-step explanation:

Think PEMDAS

First, we factor the parenthesis:

-4 (x-4) = -4(x) + -4(-4)

now we are left with -4x + 16 = -44

Next is to isolate the "x":

to do this, we must subtract 16 from -44

-44 - 16 = 60

now we have -4x = 60

Now we divide both sides by -4 in order to isolate "x"

dividing -4x/-4 = x

diving 60/-4 = -15

the answer is x= -15

5 0

2 years ago

Two gears are connected and are rotating simultaneously. The smaller gear has a radius of 3 inches, and the larger gear has a ra

Crank

Answer:

Part 1: Angle = 154.3°

Part 2: About 2.33 Rotations

Step-by-step explanation:

Part 1:

The arc length of a circle is given by the formula $s=r\theta$

Where

s is the arc length
r is the radius of the circle
$\theta$ is the angle

**The angle are in radians and we will use radian**

When smaller gear has made 1 complete rotations ( $2\pi$ radians), the arc length traveled is $s=r\theta\\s=(3)(2\pi)\\s=6\pi$

Now, what angle is swept by the larger circle when it travels $6\pi$ ? Put in $s=6\pi$ and r is 7 to find $\theta$ :

$s=r\theta\\6\pi=(7)\theta\\\theta= \frac{6\pi}{7}$

** Since $\pi$ radians is 180°, we plug in 180 into $\pi$ and find the degree measure:

$\frac{6\pi}{7}=\frac{6*180}{7}=154.3$

Angle = 154.3°

Part 2:

In one complete rotation of the larger gear, it travels a distance of:

$s=r\theta\\s=(7)(2\pi)\\s=14\pi$

We know that the smaller circle makes 1 rotation and travels $s=r\theta=(3)(2\pi)=6\pi$ , so in $14\pi$ distance, it makes:

Rotations = $\frac{14\pi}{6\pi}=\frac{14}{6}=2.33$

About 2.33 Rotations

4 0

3 years ago

Find the zero of the polynomials P(x) = x² - 5 P(x) =4x² - 1 P(x)=10x -

NARA [144]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

If your answer is a square root, you must simplify and include the square root. Example:

morpeh [17]

Answer:

I think it is 4

the decimal is 3.5

so the number is 4?

Step-by-step explanation:

6 0

3 years ago

Find a fundamental set of solutions {<img src="https://tex.z-dn.net/?f=y_%7B1%7D%2Cy_%7B2%7D%20" id="TexFormula1" title="y_{1},y

weeeeeb [17]

Another Cauchy-Euler ODE.

$y=x^r$
$\implies r(r-1)-13r+49=r^2-14r+49=(r-7)^2=0$
$\implies r=7$
$\implies y=C_1x^7+C_2x^7\ln x$

where $y_1=x^7$ and $y_2=x^7\ln x$ .

To verify that these solutions are linearly independent, check the Wronskian:

$W(y_1,y_2)=\begin{vmatrix}x^7&x^7\ln x\\7x^6&x^6(7\ln x+1)\end{vmatrix}=x^{13}$

and so the solutions are indeed independent.

7 0

3 years ago