Well, the best explanation is that if you keep going up you will eventually get the number so 2/5 times 1 is 2/5, 2/5 times 2 is 4/5 some it between exactly so its .5 times as large
we know that 40 is the 100%, so what would 12 be off of it in percentage?
![\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 40&100\\ 12&x \end{array}\implies \cfrac{40}{12}=\cfrac{100}{x}\implies \cfrac{10}{3}=\cfrac{100}{x} \\\\\\ 10x=300\implies x=\cfrac{300}{10}\implies x=30](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Barray%7D%7Bccll%7D%20amount%26%5C%25%5C%5C%20%5Ccline%7B1-2%7D%2040%26100%5C%5C%2012%26x%20%5Cend%7Barray%7D%5Cimplies%20%5Ccfrac%7B40%7D%7B12%7D%3D%5Ccfrac%7B100%7D%7Bx%7D%5Cimplies%20%5Ccfrac%7B10%7D%7B3%7D%3D%5Ccfrac%7B100%7D%7Bx%7D%20%5C%5C%5C%5C%5C%5C%2010x%3D300%5Cimplies%20x%3D%5Ccfrac%7B300%7D%7B10%7D%5Cimplies%20x%3D30)
Answer:
XZ ≈ 14.4 cm
Step-by-step explanation:
Using the cosine ratio in the right triangle, that is
cos29° =
=
=
( multiply both sides by XZ )
XZ × cos29° = 12.6 ( divide both sides by cos29° )
XZ =
≈ 14.4 cm ( to 3 significant figures )
The equation has B. no solution
Substitute for y in the second equation so x=2x +9, then subtract x from both sides so that 0=x+9, then subtract 9 from both sides and you get x= -9