Choose the products that complete the reaction. The chemical equation may not be balanced.
NaHCO3 + HC2H302 → ?
O NaC2H302 + H20
O NaC2H302 + CO2 + H20
O NaC2H302 + H2

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

first one because it can't have a fraction in it

step-by-step explanation:

your answer is  

d.

196.5 m2

step-by-step explanation:

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

leave feedback if u need : )