Question

Help me ASAP! Thank you! 25 points

Which expression(s) are equivalent to -2x + 3 + 7y + 4x -5. Select all the correct answers.
A. 2x + 7y - 2
B. 9xy - 2
C. 7y -2 + 2x
D. -x + 10yx - 5

Answer 1

Explanation:

-2x + 3 + 7y + 4x - 5 = 2x + 7y - 2

as addition is commutative (= can be done in any sequence of terms), the right answers are variations in the sequence of these 3 terms :

A and C are correct.

B and D disqualify themselves right away by including mixed terms of xy. you can never ever create such a mixed term just out of addition or subtraction of single x and y terms. you need multiplication to do that. but there is none.

Answer 2

`\sf \: a) \: 2x + 7y - 2`

`\sf \: c) \: 7y - 2 + 2x`

Explanation:

Now we have to,

→ Simplify the given expression.

The expression is,

→ -2x + 3 + 7y + 4x - 5

Let's simplify the expression,

→ -2x + 3 + 7y + 4x - 5

→ -2x + 4x + 7y + 3 - 5

→ (-2x + 4x) + (7y) + (3 - 5)

→ (2x) + 7y + (-2)

→ 2x + 7y - 2

→ 7y - 2 + 2x

Hence, option (a) & (c) is correct.