1. En un examen la teoría vale el 60% y los problemas 40% de la nota final. Si Pedro tiene de nota final un 7 y sacó en los problemas un 5.125 ¿Qué nota tuvo en la teoría?

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it

answer: answer is b.

[m < b = 120º]

step-by-step explanation:

d .tv

step-by-step explanation:

the side tv is included in both triangles.   this means it corresponds to itself in the transformation.

this is justified by using the reflexive property, which states that anything is congruent to itself.