Answer:
z=7
Step-by-step explanation:
If z represents 1/2 of 14, then z=14*1/2=14/2=7
#1)
-5-3=-8
-2x=-8
x=4
#2
D.) 5-2=3
#3
D.) 5×-2=-10
<span><span>220<span> cm2</span>/s </span>
EXPLINATION</span>
L length of rectangel (cm)
W width of rectangel(cm)
A area of rectangel (cm²)
T time (s)
we are told that:
d1\dt=8cm\s(const),and dw\dt =3cm\s(const)
the area of the rectangel is
A=LW
Differentiating wrt t (using the product rule) we get;
<span><span><span>dA</span><span>dt</span></span>=<span>(l)</span><span>(<span><span>dw</span><span>dt</span></span>)</span>+<span>(<span><span>dl</span><span>dt</span></span>)</span><span>(w)</span></span>
∴<span><span>dA</span><span>dt</span></span>=3l+8w
So when <span>l=20</span><span> and </span><span>w=10⇒</span>
<span> <span><span>dA</span><span>dt</span></span>=3⋅20+8⋅20</span>
<span>∴<span><span>dA</span><span>dt</span></span>=60+160</span>
<span>∴<span><span>dA</span><span>dt</span></span>=220<span> cm2</span>/<span>s</span></span>
1. 2.5/5 = .50
2.4/6 = .40 Lowest price
3.0/6 = .50
2.4/4 = .60
2. 150/6 = 25 Equivalent
50/1.5 = 33.33
100/3.8 = 26.32
75/3 = 25 Equivalent
3. 30/1 = 30
90/2 = 45
180/3 = 60 Fastest
240/6 = 40
