Answer:
2.25a-5
Step-by-step explanation:
rate brainiest please!
Answer:
Step-by-step explanation: Dot plot for movies seen by a students in a month
To Find : measures of spread
Solution:
Movies frequency cumulative frequency
0 1 1
1 0 1
2 0 1
3 0 1
4 3 4
5 8 12
6 3 15
7 1 16
8 5 21
9 2 23
10 3 26
Range = 10 - 0 = 10
Q2 = (6 + 6)/2 = 6 (13th + 14t)/2
Q1 = 5 7th
Q3 = 8 20th
IQR = Q3 - Q1
= 8 - 5
= 3
27+16x because u use the distributive property
Ur gonna have to pick an equation and solve for a variable.
2x - 2y = 6
2x = 2y + 6 ...divide everything by 2 because u want x by itself
x = y + 3
now we sub y + 3 in for x in the other equation
14x - 2y = 78
14(y + 3) - 2y = 78...distribute thru the parenthesis
14y + 42 - 2y = 78...subtract 42 from both sides, cancelling the 42 on the left
-42 -42
-----------------------
14y - 2y = 36 ...simplify
12y = 36...divide by 12 on both sides, cancelling out the 12 on the left
y = 36/12
y = 3
now , we already know that x = y + 3...and we know y = 3...so sub in 3 for y and solve for x
x = y + 3
x = 3 + 3
x = 6
solution is (6,3)
it is always a good idea to check ur answer by subbing it into one or both of the equations to see if it is correct
2x - 2y = 6......(6,3)...x = 6 and y = 3
2(6) - 2(3) = 6
12 - 6 = 6
6 = 6 (correct)
so yes, ur solution is (6,3)