Answer:
-6
Step-by-step explanation:
There are two ways you can do this. You can use the longer way:
15+16+17+18+19+20+21+22+23+24 = 195 (starting from the top row, which has 15 logs, up until the bottom row, which has 24 logs, on condition that each second row has one log more than the previous one)
You can also use the formula (where n is the number of rows)
x= (n(first term+last term))/2
x= (10(15+24))/2
x= (10*39)/2
x=390/2
x=195
Either way, there are 195 logs in the stack.
Answer: The second answer
Step-by-step explanation:
Answer:
Answer is D 2x^3 + 7x^2 - 23x + 12
Step-by-step explanation:
(x^2 + 5x - 4)(2x - 3)
Expand by multiplying each term in the first expression by each term in the second expression.
The easy way would be multiplying the first expression by 2x then set those numbers off to the side.
Then multiply the first expression by -3 and set those numbers off to the side as well.
Then add the numbers you put off to the side together.
This should result in: 2x^3 - 3x^2 + 10x^2 - 15x - 8x + 12
Combine the alike terms together
=2x^3 + 7x^2 -23x + 12
( 3/4 =7.5,) 0.7, ( 1/2=0.5,) 0.1 so the correct answer will be
( 0.1, 1/2, 0.7, 3/4
