Which would the phrase "twice the sum of a number and three" look
like as a variable expression?
question 9 options:
a. 2n+3
b. 2(n+3)
c. 2+ (2n+3)
d. 2(2n-3)

"twice the sum" means 2 times the sum of some numbers
"a number and 3" means n+3 if we rpresent the number as n

so
2 times (n+3)
2(n+3)

B is answer

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c