Posted by Sara! on Wednesday, June 9, 2010 at 7:46pm.
how do you solve this
plz show me how you do this
1. on her last three quizzes, jane scored 84, 96, and 88. what grade must she get on her next quiz to have an average of 90 for all four quizzes?
2. a square and a equilateral triangle have the same perimeter. what is the perimeter of each shape?
sqaure P = X
equilateral triangle P = x + 2
THANK YOU!!

MATH!  drwls, Wednesday, June 9, 2010 at 7:57pm
1. (84 + 96 + 88 + x)/4 = 90
Solve for x.
2. Read the question again. They already told you the perimeters are the same.
You cannot say what the perimeter is with the information you have provided. All you know is that they are equal. 
MATH!  Sara!, Wednesday, June 9, 2010 at 8:01pm
how do you do # 1

MATH!  Sara!, Wednesday, June 9, 2010 at 8:02pm
the question for # 2 is FIND the perimeter of each shape

MATH!  drwls, Wednesday, June 9, 2010 at 8:04pm
Solve the equation I wrote for you.
The next step would be to rewrite it as
268 + x = 4*90 = 360
Then subtract 268 from sides. 
MATH!  Sara!, Wednesday, June 9, 2010 at 8:11pm
how do you do number 2 the question is FIND the perimeter of each shape

MATH!  Albejoice, Wednesday, June 9, 2010 at 11:13pm
EVERYONES COOL!!!!!!!!!!!

MATH!  UNKNOWN (agent xb), Wednesday, June 9, 2010 at 11:14pm
EVERYONES A CRITIC

ALGEBRA  UNKNOWN (agent xb), Wednesday, June 9, 2010 at 11:17pm
IS LETTER x NUMBER it IS SOOOOO!!! EASY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!