Answer:
4-9y^2
Step-by-step explanation:
(2+3y)(2-3y)
2*2
2*-3y
3y*2
3y*-3y
4-6y+6y-9y^2
4-9y^2
Answer:
the answer is C: 2,500.80
Step-by-step explanation:
Answer:
62 m
Step-by-step explanation:
let the height of tower=x
then ![\frac{x}{36.25} =\frac{2.8}{1.63} \\x=\frac{2.8}{1.63} \times 36.25 \approx 62.27 ~m \approx 62 m](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B36.25%7D%20%3D%5Cfrac%7B2.8%7D%7B1.63%7D%20%5C%5Cx%3D%5Cfrac%7B2.8%7D%7B1.63%7D%20%5Ctimes%2036.25%20%5Capprox%2062.27%20~m%20%5Capprox%2062%20m)
Answer:
A
Step-by-step explanation:
Group the 4 terms into groups of 2 without changing their order. That looks like this:
![(2x^3+6x^2)+(5x+15)](https://tex.z-dn.net/?f=%282x%5E3%2B6x%5E2%29%2B%285x%2B15%29)
Now within each group pull out what's common:
![2x^2(x+3)+5(x+3)](https://tex.z-dn.net/?f=2x%5E2%28x%2B3%29%2B5%28x%2B3%29)
Now we have (x + 3) common between the 2 terms, so let's pull that out. With grouping, you know that it "works" if what's in the parenthesis are both exactly the same term. Ours are both (x + 3). What's "left over" are the things we originally pulled out, so group those together and you're done!
![(x+3)(2x^2+5)](https://tex.z-dn.net/?f=%28x%2B3%29%282x%5E2%2B5%29)
1st problem:
4(c-3)=4c+8
4c-12=4c+8
4c=4c+20
0=20
The answer is D) No Solution
2nd problem:
3(z+1)+4(z-3)=5
3z+3+4z-12=5
7z-9=5
7z=14
z=2
The answer is D) z=2