PLSS HELP FOR 100 POINTSSS PLSSS HELP IF U HELP ILL SEND 50 MORE POINTS TO UR ACC PL The members increased their elevation 290 feet during their hike this morning. Now they are at an elevation of 450 feet.

1. Write an expression that would represent their elevation before the hike.

2. Han says the equation e+290=450 describes the situation. What does the variable represent?
A. the starting elevation
B. the ending elevation
C. the elevation halfway through their hike

3. What is their starting elevation?

1. e+290=450

2. A

3. 450-290=160

Step-by-step explanation:

1. x+290 2. A 3. 290 because 290+290=450

Step-by-step explanation:

water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. at this point, equilibrium is reached. in an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

hope this < 3

option a, c,d are correct.

step-by-step explanation:

from the given figure, it is given that z is equidistant from the sides of the triangle rst, then from triangle tzb and triangle szb, we have

tz=sz(given)

bz=zb(common)

therefore, by rhs rule,δtzb ≅δszb

by cpctc, sz≅tz

also, from δctz and δasz,

tz=sz(given)

∠tcz=∠saz(90°)

by rhs rule, δctz ≅ δasz, therefore by cpctc, ∠ctz≅∠asz

also,from δasz and δzsb,

zs=sz(common)

∠zbs=∠saz=90°

by rhs rule, δasz ≅δzsb, therefore, by cpctc, ∠asz≅∠zsb

hence, option a, c,d are correct.