Answer:
0.06545
Step-by-step explanation:
use the formula v=(4/3)*pi*r^3. here r (radius) is 1/4 or 0.25. so 0.25^3 is 0.015625. multiply pi so 0.05. divide by 3 so 0.0164 and multiply 4 so 0.06545.
Answer:
50%
Step-by-step explanation:
Well you do 30/20 = 1.5
1.5 - 1 = .5
.5 = 50%
Answer:
2.9 x 10∧-7
Step-by-step explanation:
Answer:
x²+5x - 150 = 0
Step-by-step explanation:
Let the length be y and width be x
If the length of a swimming pool is 10 more than 2 times the width, then;
y = 2x+10 ...1
Since the Area is 300m²
A = xy
300 = xy .... 2
Substitute 1 into 2
300 = x(2x+10)
300 = 2x²+10x
Rearrange
2x²+10x - 300 = 0
Divide through by 2
x²+5x - 150 = 0
This gives the required quadratic expression
Answer:
Two expressions are said to be equivalent if they have the same value irrespective of the value of the variable(s) in them.
Step-by-step explanation:Consider the expressions 32+1 and 5×2 . Both are equal to 10 . That is, they are equivalent expressions.
Now let us consider some expressions that include variables, say 5x+2 .
The expression can be rewritten as 5x+2=x+x+x+x+x+1+1 .
We can re-group the right side of the equation to 2x+3x+1+1 or x+4x+2 or some other combination. All these expressions have the same value, whenever the same value is substituted for x . That is, they are equivalent expressions.