Ellen said that (5 × 4) × 3 = 60. which is another way to do this problem to check ellen's answer?

a.
(5 + 4) × 3

b.
5 × (4 × 3)

c.
5 × (4 – 3 )

d.
5 × (4 + 3)

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,