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Sholpan [36]
3 years ago
9

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

Mathematics
1 answer:
adell [148]3 years ago
7 0

Answer:

B.

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<br> 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:

<u>Part 1:</u> Angle = 154.3°

<u>Part 2:</u> 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<br> P(x) = x² - 5<br> P(x) =4x² - 1<br> P(x)=10x -
NARA [144]

Answer:

2

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
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