restgarnut
2022-09-13
Answered

If I write 3 to the left of my number, and double this three-digit number, the result is 27 times my original number. What is my number?

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asked 2021-05-13

A movie stuntman (mass 80.0kg) stands on a window ledge 5.0 mabove the floor. Grabbing a rope attached to a chandelier, heswings down to grapple with the movie's villian (mass 70.0 kg), whois standing directly under the chandelier.(assume that thestuntman's center of mass moves downward 5.0 m. He releasesthe rope just as he reaches the villian).

a) with what speed do the entwined foes start to slide acrossthe floor?

b) if the coefficient of kinetic friction of their bodies withthe floor is 0.250, how far do they slide?

asked 2020-10-18

Find a least squares solution of Ax=b by constructing and solving the normal equations.

$A=\left[\begin{array}{cc}3& 1\\ 1& 1\\ 1& 4\end{array}\right],b\left[\begin{array}{c}1\\ 1\\ 1\end{array}\right]$

$\stackrel{\u2015}{x}=$ ?

asked 2022-09-01

The length of a rectangle is 2 x 10m feetand the width is 3 x 10n feet. The area canbest be

described by:

A. 6 x 10 m+n sq.ft.

B. 6 x10mn sq.ft.

C. 6(m +n) sq. ft.

D. 6 x 100m+n sq.ft.

E. 6 x100mn sq. ft.

described by:

A. 6 x 10 m+n sq.ft.

B. 6 x10mn sq.ft.

C. 6(m +n) sq. ft.

D. 6 x 100m+n sq.ft.

E. 6 x100mn sq. ft.

asked 2021-09-16

The given equation involves a power of the variable. Find all real solutions of the equation.

$5{x}^{2}-125=0$

asked 2022-05-18

Calculate the value of x such that -19x equals 12.

asked 2021-09-16

Solve the equation 7x+2y=8 for y, identify the slope, then find an equation for the line that is parallel to the line 7x+2y=8 and passes through the point (0,4).

asked 2021-11-20

Solve the equation.

$\frac{3+5x}{5}=\frac{4-x}{7}$