Since he can run 1/4 of a mile in 2.5 minutes, he will run a full mile in 4*2.5 =10 minutes, assuming he runs at a steady speed.
5000000+900000+90000+1000+300+40+6
Since b = 3 the equation changes
5a - 10(3) = 45
5a - 30 = 45
(Add 30 to both sides)
5a = 75
Divide 5 to both sides
a = 15
1.
s = 2(lw) + 2(lh) + 2(wh)
s = 2(2cmx3cm) + 2(2cmx4cm) + 2(3cmx4cm)
s = (2 x 6cm) + (2 x 8cm) + (2 x 12cm)
s = 12cm + 16cm + 24cm
s = 28cm + 24cm
s = 52cm^2
answer= 3rd option
2.
s = 2(lw) + 2(lh) + 2(wh)
s = 2(1mx10m) + 2(1mx5m) + 2(10mx5m)
s = (2 x 10m) + (2 x 5m) + (2 x 50m)
s = 20m + 10m + 100m
s = 30m + 100m
s = 130m^2
answer= 4th option
3.
s = 2(bh/2) + hw + sw + bw
s = 2(3ftx2ft/2) + (2ftx5ft) + (4ftx5ft) + (3ftx5ft)
s = 2(6ft/2) + 10ft + 20ft + 15ft
s = 2 x 3ft + 10ft + 35ft
s = 6ft + 45ft
s = 51ft^2
answer= 2nd option
4.
s = 6a^2
s = 6 x 2mm^2
s = 6 x 4mm
s = 24mm^2
answer= 3rd option
5.
s = 6a^2
6cm^2 = 6a^2<span><span>6−<span>6<span>a^2</span></span></span>=<span><span>6<span>a^2</span></span>−<span>6<span>a^2</span></span></span></span><span><span><span>−<span>6<span>a^2</span></span></span>+6</span>=0</span><span><span><span><span>−<span>6<span>a^2</span></span></span>+6</span>−6</span>=<span>0−6</span></span><span><span>−<span>6<span>a^2</span></span></span>=<span>−6</span></span><span><span><span>−<span>6<span>a^2/</span></span></span><span>−6</span></span>=<span><span>−6/</span><span>−6</span></span></span><span><span>a^2</span>=1</span><span>a=<span><span>√1</span></span></span><span><span>a=<span><span>1<span>
answer= 1st option</span></span></span></span></span>
