13. 17y² - 22y
14. 9m²n+7mn²
15. 11y²
16. 8x²y
I'm not 100% sure if these are all correct, so please forgive me if I'm wrong.
Hopefully this helps, and please consider marking branliest.
So we multiply 2 by 12, and get 24.
Then we multiply 8 by 3, and get 24.
Next we give both terms new denominators -- 3 × 12 = 36.
So now our fractions look like this:
<span><span>24/36</span>−<span>24/36</span></span><span><span>Since our denominators match, we can subtract the numerators.24 − 24 = 0So the answer is:<span>0/36 z</span></span><span>ero divided by anything is just zero. So that's the final answer:
<span>0</span></span></span>
You can calculate it using the law of cosines: c^2=a^2+b^2-2*a*b*cos(C)
your triangle is
CD=15=a
CE=?=b
DE=CE+3=b+3=c
and C=90°
-> insert those values, with c substituted with b+3 to remove c
c^2=a^2+b^2-2*a*b*cos(C)
(b+3)^2=15^2+b^2-2*15*b*cos(90)
cos(90)=0->
(b+3)^2=15^2+b^2
b^2+2*3*b+3^2=225+b^2
6b+9=225
6b=216
b=36=CE
DE=CE+3=36+3=39
She sold 5 large bracelets.
