Choose the best definition for the following term: exponent (1 point) The number listed first when combining a variable and a numberThe number or value being raised to a powerA letter that holds the place of some unknown value in mathematicsShorthand that tells how many times the base is used as a factor, or how many times the base is multiplied by itself3. (01.02)Simplify the following expression:2x − 2y + 5z − 2x − y + 3z (1 point) x − 3y + 8z2x − 2y + 8z3y + 8z−3y + 8z4. (01.02)Evaluate the following expression using the values given:Find 3x − y − 3z if x = −2, y = 1, and z = −2. (1 point) −13−1113