Answer: x+7
Step-by-step explanation: An algebraic expression contains letters and numbers that are connected with mathematical operators or symbols.
The sum of x and 7 as an algebraic up expression is:
x+7
This expression contains a variable , a mathematical symbol and a number. Hope it helped.
Solve this like a regular equation:
2n + 5 > 1
2n > -4
n > -2
Hope this helped!
Answer:
Step-by-step explanation:
From the information given,
Mark: 6,7,8,9,10
frequency:5,4,7,10,4
a) Range = highest mark - lowest mark
Range = 10 - 6 = 4
b) The number of students in the group is the sum of the frequency. Therefore,
Number of students = 5 + 4 + 7 + 10 + 4 = 30 students
c) Mean mark = (mark × frequency)/total frequency
[(6 × 5) + (7 × 4) + (8 × 7) + (9 × 10) + 10 × 4)]/ 30
Mean mark = (30 + 28 + 56 + 90 + 40)/30 = 244/30
Mean mark = 8.1