Answer:
X is 6.
Step-by-step explanation:
Because 42 minus 2 is 40 so therefore the answer has to be 40. So what you do is figure out the number that is X to get 40. In that case, it would be 6. 6 times 6 is 36 plus the 4 and you get 40.
hope i helped.
Answer:
It would be $31.80
Step-by-step explanation:
First thing you want to do is to take 6% of $30, which is $1.80.
Add that $1.80 to $30 to get the price after sales tax.
Answer:
65625/4(x^5)(y²)
Step-by-step explanation:
Using binomial expansion
Formula: (n k) (a^k)(b ^(n-k))
Where (n k) represents n combination of k (nCk)
From the question k = 5 (i.e. 5th term)
n = 7 (power of expression)
a = 5x
b = -y/2
....................
Solving nCk
n = 7
k = 5
nCk = 7C5
= 7!/(5!2!) ------ Expand Expression
=7 * 6 * 5! /(5! * 2*1)
= 7*6/2
= 21 ------
.........................
Solving (a^k) (b^(n-k))
a = 5x
b = -y/2
k = 5
n = 7
Substituting these values in the expression
(5x)^5 * (-y/2)^(7-5)
= (3125x^5) * (-y/2)²
= 3125x^5 * y²/4
= (3125x^5)(y²)/4
------------------------------------
Multiplying the two expression above
21 * (3125x^5)(y²)/4
= 65625/4(x^5)(y²)
The answer would be A i hope this helped
