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2 years ago

YOU'LL GET 50 POINTS IF U ANSWER THIS CORRECTLY! WILL MARK BRAINLEST!

Mathematics

1 answer:

ehidna [41]2 years ago

7 0

Answer:

"Moving slowley" is the correct

Step-by-step explanation:

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Line A is represented by the equation given below:

Simora [160]

Answer:

Step-by-step explanation:

2x + 2y = 4

dividing both sides by 2,we get

x + y = 4,which is the same line A

so this set of equations has infinitely many solutions as they intersect each other at infinite points i.e they overlap eachother

8 0

2 years ago

X^2-24x+9=0<br><br> Show your work.<br><br> Plz help!

shtirl [24]

That answer is incorrect and it’s false

5 0

2 years ago

Using 4 equal-width intervals, show that the trapezoidal rule is the average of the upper and lower sum estimates for the integr

prisoha [69]

Split up the interval [0, 2] into 4 subintervals, so that

$[0,2]=\left[0,\dfrac12\right]\cup\left[\dfrac12,1\right]\cup\left[1,\dfrac32\right]\cup\left[\dfrac32,2\right]$

Each subinterval has width $\dfrac{2-0}4=\dfrac12$ . The area of the trapezoid constructed on each subinterval is $\dfrac{f(x_i)+f(x_{i+1})}4$ , i.e. the average of the values of $x^2$ at both endpoints of the subinterval times 1/2 over each subinterval $[x_i,x_{i+1}]$ .

So,

$\displaystyle\int_0^2x^2\,\mathrm dx\approx\dfrac{0^2+\left(\frac12\right)^2}4+\dfrac{\left(\frac12\right)^2+1^2}4+\dfrac{1^2+\left(\frac32\right)^2}4+\dfrac{\left(\frac32\right)^2+2^2}4$

$=\displaystyle\sum_{i=1}^4\frac{\left(\frac{i-1}2\right)^2+\left(\frac i2\right)^2}4=\frac{11}4$

4 0

2 years ago

In the expression -12+m-9m+13, name the coefficients

torisob [31]

Answer:

-12

Step-by-step explanation:

its just the numbers in front of the variables

4 0

2 years ago

Read 2 more answers

The mean height of married American women in their early twenties is 64.5 inches and the standard deviation is 2.5 inches. The m

SSSSS [86.1K]

Answer:

The equation for regression line and predicting a husband's height for married couples in their early 20s

Equation: Y'=33.67+0.54*X'

Step-by-step explanation:

r=0.5

x'=64.5

Sx=2.5

y'=68.5

Sy=2.7

General regression line equation is:

Y'=a+b*X'

so the slope of the regression line is the linear correlation coefficient multiplied by the standard deviation for y' divided by the standard deviation for x'

$b=r*\frac{S_{y}}{S_{x}}\\b=0.5*\frac{2.7}{2.5}\\b=0.54$

The intercept with axis y is the mean of the decreased by the product of the slope and the mean of x

$a=y'-b*x'\\a=68.5-0.54*64.5\\a=33.67$

The equation regression line then is:

Y'=33.67+0.54*X'

4 0

2 years ago