31-12-2005 7th 578u75tvxy
Answer:
20. 4n+5+8n-5=180(linear pair)
12n=180
n=15
21. 9x-6=8.5x+2(can be seen from image)
9x-8.5x=2+6
0.5x=8
x=8/0.5
x=80/5
x=16
22. 4z+3z+6=90°(Complementary)
7z+6=90°
7z=84°
z=12°
$1260
Step-by-step explanation:
70/100 × $1800 = $1260
y=2x^2+1
a quadratic equation has a x^2 term
22% = 154
100%= ?
=100×154/22
= 700
