In each of the following,find the value of the unknown .show your steps clearly.
1. V=4/3 丌r^3
If 丌=3 and r=5,find V.
2. A=56/n+m
If A=12,m=5,find n.
3. y=mx+c
If m=1/4,x=-12 and c=7,find y.
4.A=P(1+r/100)
If A =110 and r=10,find p
4Q of maths 20dim
2012-12-07 5:41 am
回答 (2)
2012-12-07 5:59 am
✔ 最佳答案
1. V=4/3 丌r^3Sub 丌 and r
V = 4/3 * 3 * 5^3
V=500
2. A=56/n + m
Sub A and m
12= 56/n + 5
12-5 = 56 /n
n = 56/ (12-5)
=8
3. y=mx+c
Sub m, x and c
y = (1/4)(-12) + 7
y = 4
4. A=P(1+r/100)
Sub A and r
110=P(1+10/100)
110=P(1.1)
110/(1.1)=P
P=100
2012-12-07 6:00 am
V=4/3丌r^3
V=4/3(3)(5)^3
V=500
A=56/n+m
12=56/n+5
12-5=56/n
7=56/n
7n=56
n=56/7
n=8
y=mx+c
y=(1/4)(-12)+7
y= -3+7
y=4
A=P(1+r/100)
110=P(1+10/100)
110=P(11/10)
P=100
V=4/3(3)(5)^3
V=500
A=56/n+m
12=56/n+5
12-5=56/n
7=56/n
7n=56
n=56/7
n=8
y=mx+c
y=(1/4)(-12)+7
y= -3+7
y=4
A=P(1+r/100)
110=P(1+10/100)
110=P(11/10)
P=100
參考: me
收錄日期: 2021-05-01 01:11:56
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