What is the leading coefficient of the following expression: 5x^4-7x^3+2x+1

5

Step-by-step explanation:

The leading coefficient belongs to the term with the largest exponent

Given

5 - 7x³ + 2x + 1 ← in standard form

The leading term is 5 ← with leading coefficient 5

The correct statement is  y=w and ABC  ~ CDE

Step-by-step explanation:

According to the attached picture:

sin(y°) = cos(x°)

But also notice that cos(x°) is also equal to sin(w°). We can write it as:

cos(x°)=sin(w°)

It means that sin(y°) =sin(w°).

y=w

And we already know that:

∠CAB = ∠ECD where y=w

Therefore,

∠ABC = ∠CDE   = 90°

Thus the correct statement is

y=w and ABC  ~ CDE