Answer:
x² + 9x + 20
Step-by-step explanation:
Area of a rectangle can be found by multiplying the base with height (or length with width).
A(r) = l x h.
Multiply. Plug in:
x + 5 for l
x + 4 for h
A(r) = (x +5) * (x + 4)
Use the FOIL method to solve. Multiply the first terms of both parenthesis, the outside terms, the inside terms, and then the last terms. Combine like terms:
A(r) = (x + 5) * (x + 4)
x * x = x²
x * 4 = 4x
5 * x = 5x
4 * 5 = 20
x² + 4x + 5x + 20
x² + (4x + 5x) + 20
x² + 9x + 20
x² + 9x + 20 is your answer.
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Answer:
k idk it
Step-by-step explanation:
Answer:
more than 5 sacks
Step-by-step explanation:
1 1/4 sack of flour per day
5 days
5 * 1 1/4
Change to an improper fraction
5 * (4*1+1)/4
5 * 5/4
25/4
Change to a mixed number
6 1/4 sacks
Answer:
C 2x^2 + 3/2x -5
Step-by-step explanation:
f(x)=x/2-2
g(x)=2x^2+x-3
(f+g) (x)=x/2-2+2x^2+x-3
Combine like terms
2x^2 + 3/2x -5
9514 1404 393
Answer:
sum = ∑[n=1,5] 4^(n-4)
Step-by-step explanation:
First of all, you need to be able to describe the n-th term.
Here, we have ...
term #: 1, 2, 3, 4, 5
value: 4^-3, 4^-2, 4^-1, 4^0, 4^1
That is, the exponent of 4 is 4 less than the term number. So, the n-th term is 4^(n-4). The sum of the 5 terms shown is then ...
![\displaystyle sum=\sum_{n=1}^5{4^{n-4}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20sum%3D%5Csum_%7Bn%3D1%7D%5E5%7B4%5E%7Bn-4%7D%7D)