X+3y=52.9 /*3
3x +9y= 158.7
3x+ 5y = 155.5
4y = 3.2 /4
Y = 0.8
X +3*0.8 = 52.9
X = 52.9-3*0.8
X = 50.5
racket 50.0 $
Tennis ball 0.8$
Answer:
104 in²
Step-by-step explanation:
look at the picture above... by splitting the figure, we get two rectangles.
a1= 5×4 = 20in²
a2= 12×7= 84 in²
total area = a1+a2 = 20+84=104in²
50mm
0.005m × 100cm = 0.5cm
0.5 cm × 10mm = 5mm not 50mm
8n+7=31
-7 -7
8n= 24
/8 /8
N=3