Answer:79
Step-by-step explanation:
9x8+7
=>72+7
=>79
Answer:
my bad
Step-by-step explanation:
Answer:
3x-25
Step-by-step explanation:
The unknown number is represented by x. When you multiply x by a number, it is written as the coefficient of that variable. And the "25 less" is self explanitory: you are subtracting because less means subtraction in world problems like these!
Answer:
a) X + X + 1 = 11
Step-by-step explanation:
Em matemática, a soma de consecutivos é expressa matematicamente como:
X + (X + 1) + (X + 2) + (X + 3) .............
Na pergunta acima, somos solicitados a encontrar a expressão algébrica que indica que a soma de DOIS inteiros consecutivos é igual a 11
Portanto, esta expressão algébrica é dada como:
X + (X + 1) = 11
X + X + 1 = 11
Portanto, a opção a) X + X + 1 = 11 é a opção correta
Answer:
8568 ways
Step-by-step explanation:
We have to in this particular case the order to find a 5 person group out of a class of 18, when order does not matter, we use combinations. In this case n = 18 and r = 5.
We have that the combination formula is:
nCr = n! / (r! * (n-r)!)
replacing we have:
18C5 = 18! / (5! * (18-5)!)
18C5 = 8568
What it means in total are 8568 ways of arms groups.