Simplify: -10(2r - 4)

Simplified -20r + 40

Step-by-step explanation:

Step 1: Use the distributive property. -10(2r - 4)    

-10 x 2r = -20r and -10 x (-4) = 40

(If you are multiplying two negative integers your answer will always be positive.)

Step 2: Simplified (-20r + 40)

step-by-step explanation:

i am not sure sorry : c

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.