Writing and Solving Systems Given Word Problems — Writing and Solving Systems by Graphing Given Word Problems. A school wants to buy some new desks and chairs. If it buys 40 desks and 100 chairs, the total cost is $1100; if it buys 50 desks and 80 chairs, the total cost is $1150. What is the price of a desk and a chair?

answer: sine

step-by-step explanation:

need more information

step-by-step explanation:

what

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet