The hardcover version of a book weighs twice as much as its paperback version. the hardcover book and the paperback together weigh 4.2 pounds. which system of equations can be used to find h, the weight of the hardcover book, and p, the weight of the paperback?
a) h = p − 4.2
h = 2p
b) h = 4.2 − p
p = 2h
c) h = p − 4.2
p = 2h
d) h = 4.2 − p
h = 2p

Option D is correct.

System of equations can be used is given by:

Step-by-step explanation:

here, h represents the weight of the hardcover book, and p represents the weight of the paperback.

As per the given statement: The hardcover version of a book weighs twice as much as its paperback version.

⇒

Also, it is given that the hardcover book and the paperback together weigh 4.2 pounds

⇒

or

Therefore, the system of equations can be used is given by:

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).