13 and a half 5 and half and 16
(first correct answer gets brainliest)
(it is the square root of both 6x and 38)
Answer:
The solution set is = {7, 9}.
Step-by-step explanation:
√(6x - 38) = x - 5
Square both sides:
6x - 38 = (x - 5)^2
x^2 - 10x + 25 - 6x + 38 = 0
x^2 - 16x + 63 = 0
(x - 7)(x - 9) = 0
x = 7, 9.
Check these solutions:
x = 7:
√(6x - 38) = √(42-38) = 2 and 7 - 5 = 2 so this is correct.
x = 9
√(6x - 38) = √(54 - 38) = √16 = 4 and 9 - 5 = 4 so 9 is also correct.
The student is wrong, the correct expression is 9(n + 13).
Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.
Given the phrase “9 times the sum of a number and 13”
Let, n = the number
Therefore,
The sum of a number and 13 is:
n + 13
9 times the sum of a number and 13” can be written as,
9(n + 13)
Hence, the student is wrong.
Learn more about expression;
#SPJ3
b) a=m/3
c) a=1/3m
d) a= -8-m
e) none of the above
Answer: c) a =
Step-by-step explanation:
To solve for a, we will isolate the a-variable.
Given:
12am=4
Divide both sides of the equation by 12m:
a =
Simplify :
a =
This leaves us with answer option C, c) a = .