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!!

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.

how do you do # 1

the question for # 2 is FIND the perimeter of each shape

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.

how do you do number 2 the question is FIND the perimeter of each shape

EVERYONES COOL!!!!!!!!!!!

EVERYONES A CRITIC

IS LETTER x NUMBER it IS SOOOOO!!! EASY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1. To solve this problem, we need to find out what grade Jane must get on her next quiz to have an average of 90 for all four quizzes.

Step 1: Find the total score Jane has achieved on her last three quizzes.
Jane's score on her first quiz = 84
Jane's score on her second quiz = 96
Jane's score on her third quiz = 88

Step 2: Calculate the sum of Jane's scores on the three quizzes.
Sum = 84 + 96 + 88 = 268

Step 3: Determine how many quizzes Jane has taken.
Jane has taken three quizzes so far.

Step 4: Calculate the average for the first three quizzes.
Average = Sum / Number of quizzes = 268 / 3 ≈ 89.33

Step 5: Compute the score Jane needs to average 90 on all four quizzes.
To have an average of 90 for all four quizzes, the sum of her four quiz scores must be (90 * 4) = 360.

Step 6: Determine the score Jane needs on her next quiz.
Jane's score on her next quiz = Required sum - Sum of the first three quiz scores
= 360 - 268 = 92

Therefore, Jane must get a score of 92 on her next quiz to have an average of 90 for all four quizzes.

2. To solve this problem, we need to find the perimeter of both a square and an equilateral triangle when they have the same perimeter.

Let's assume the perimeter of both shapes is represented by the variable P.

For a square:
The perimeter of a square is calculated by adding up the lengths of all four sides.
Since all sides of a square are equal, we can represent the length of one side as 'x'.
Therefore, the perimeter of the square is P = 4x.

For an equilateral triangle:
The perimeter of an equilateral triangle is calculated by adding up the lengths of all three sides.
Since all sides of an equilateral triangle are equal, we can represent the length of one side as 'x'.
Therefore, the perimeter of the equilateral triangle is P = 3x.

Since both shapes have the same perimeter, we can equate the two expressions:
4x = 3x + 2x

Simplifying the equation, we get:
4x = 5x

To solve for 'x', we subtract 4x from both sides:
4x - 4x = 5x - 4x
0 = x

This means that the length of each side of both shapes is 0. Therefore, the perimeter of each shape is also 0.

Please note that there may be an error in your provided equations for the perimeter of the square and equilateral triangle. If you provide the correct equations or dimensions, we can recalculate the perimeters accordingly.