Answer:
see explanation
Step-by-step explanation:
The diagrams show triangular figures
The first figure has 1 dot
The second has 1 + 2 = 3 dots
The third has 3 + 3 = 6 dots
The fourth has 6 + 4 = 10 dots
Note the pattern is + 2 , + 3, + 4
Thus the fifth pattern is 10 + 5 = 15 dots
$\frac{9-r^2}{r^2-2r-3}\cdot\frac{4-4r^2}{r^2+4r+3}=\frac {4\left(r-1\right)}{r+1}$9− r 2 r 2−2 r −3 ·4−4 r 2 r 2+4 r +3 =4( r −1) r +1. Steps.
Answer:
D 26
Step-by-step explanation:
154+154=308
308-360=52
52 divided by 2
=26
ANSWER: y=9
First substitute x
6.4(3)+2.8y=44.4
19.2+2.8y=44.4
subtract 19.2 from both sides
2.8y=25.2
divide by 2.8 on both sides
y=9