Answer: 61% or exactly 60.9%
Step-by-step explanation:
if 34 are lifting weights then 53 (87-34) are not lifting weights and the percentage of 53/87 is 61%
Answer:
The correct option is: Both -5 and 1 are true solutions
Step-by-step explanation:
The given expression is:
√c^2+2c-4=√1-2c
By squaring both sides we get:
(√c^2+2c-4)^2=(√1-2c)^2
c^2+2c-4=1-2c
Move all the values to the L.H.S
c^2+2c-4-1+2c=0
c^2+4c-5=0
Now we will perform factorization:
c^2+5c-c-5=0
c(c+5)-1
(c+5)=0
(c+5)(c-1)=0
c+5 = 0 , c-1=0
c= 0-5 , c=0+1
c= -5 , c=1
Thus the correct option is Both -5 and 1 are true solutions....
Answer:
a) 20%
b) 50%
c) -75%
Step-by-step explanation:
Mathematically, percentage change is;
(new value -old value)/old value * 100%
(i) (90-75)/75 * 100%
= 15/75 * 100% = 20%
ii) (60-40)/40 * 100%
= 20/40 * 100% = 50%
iii) (5-20)/20 * 100% = -15/20 * 100% = -75%
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