{2x−y=9}{2x+7y=17}

Three Children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and avery light board 3.6 m long. Two playmates are already on either end. Boy A has a mass of 50kg, and girl B a mass of 35 kg. Where should girl C, whose mass is 25 kg, placed herself so as to balance the seesaw.

Which of the following is a correct comment?
*/ Comments */
** Comment **
/* Comment */
{ Comment }
Which of the following is not a correct variable type?
float
int
real
double

Assign a binary code in some orderly manner to the 52 playingcards. Use the minimum number of bits.

A tow truck pulls a car that is stuck in the mud, with a force of 2500 N as in Fig P5.27 The tow cable is under tension and therefor pulls downward and to the left on the pin at its upper end. The light pin is held in equilibrium by forces exerted by the two bars A and B. Each bar is a strut that is, each is a bar whose weight is small compared to the forces it exerts, and which exerts forces only through hinge pins at its ends. Each strut exerts a force directed parallel to its length. Determine the force of tension or compression in each strut. Proceed as follows Make a guess as to which way (pushing or pulling ) each force acts on the top pin Draw a free-body diagram of the pin. Use the condition for equilibrium of the pin to translate the free-body diagram into equations. From the equations calculate the forces exerted by struts A and B. If you obtain a positive answer, you correctly guessed the direction of the force. A negative answer means the direction should be reversed, but the absolute value correction should be reversed, but the absolute value correctly gives the magnitude of the force. If a strut pulls of a pin, it is in tension. If it pushes, the strut is in compression. Identify whether each strut is in tension or in compression.

General solution to $(\sqrt{3}-1)\cos x+(\sqrt{3}+1)\sin x=2$

Consider the set s =(x:x is a multiple of 10,x<30),described the set in words

The cost in dollars to produce x youth baseball caps is ${\displaystyle C\left(x\right)=4.3x+75}$. The revenue in dollars from sales of x caps is ${\displaystyle R\left(x\right)=25x}$.
(a) Write and simplify a function P that gives profit in terms of x.
(b) Find the profit if 50 caps are produced and sold.