Answer:
B
Step-by-step explanation:
obtuse
Answer: 12i + 21
Step-by-step explanation:
You want to apply foil to the first two terms.
- 3 x 1 = 3
- 5i x 3 = 15i
- -4i x 1 = -4i
- -4i x 5i = -20i^2
You get 3 + 11i - 20i^2. i is equal to the square root of -1, so when you square it, you will get -1. Then do -1 x -20 to get +20
So far you have (11i + 23) - (-i + 2).
- 11i + i = 12i
- 23 - 2 = 21
Im 99% sure the answer is 12i + 21
Combine like terms on the left side.
-3y + 3y + 4 = 4
-3y and 3y add to 0, so you get
4 = 4
4 = 4 is a true statement, so there is an infinite number of solutions. Every real number is a solution of this equation.
Answer: Infinitely many
4781=1781+125t
solve the equation for t to get
T=24 years
So the answer is
1940+24=1964
Answer c
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)