3 minutes - 153 words
10 minutes - x words
He can type 510 words in 10 minutes.
Answer:
adults = 40
children = 68
Step-by-step explanation:
Let the children=c
Let the adults = a
<em><u>Equations</u></em>
a + c = 108 (1)
3.75a + 1.5c = 252 (2)
Multiply (1) by 1.5
1.5a + 1.5c = 162 (3)
Subtract (3) from (2)
3.75a + 1.5c = 252
1.5 a + 1.5c = <u>162</u> Subtract
2.25a = 90 Divide by 2.25
a = 90/2.25
a = 40
<em><u>Find the number of children</u></em>
a + c = 108
40 + c = 108
c = 108 - 40
c = 68
<em><u>Check</u></em>
LHS
3.75 * 40 + 1.50 * 68
150 + 102
252 Which checks with the right hand side.
The length of the towel bar is 9.5 inches.
<em><u>Explanation</u></em>
Suppose, the length of the towel bar is inches.
The distance from each end of the towel bar to the end of the door is 9 inches. So, <u>the total width of the door</u> will be:
Given that, the <u>width of the door</u> is inches or 27.5 inches. So, the equation will be........
Thus, the length of the towel bar will be 9.5 inches.
Answer:
1200 m
Step-by-step explanation:
We are given that
Area of pasture,A=180000 square meter
We have to find the least amount of fencing required to enclose such a pasture.
Let length of pasture,=x
Width of pasture,b=y
Area of pasture=
Fencing required=2x+y
Differentiate w.r.t x
m
It is always positive because length cannot be negative.
m
Again differentiate w.r.t x
Substitute x=300
The fence is minimum at x=300
Therefore, fencing required to enclose such a pasture
Answer:
y - x + 8 = 0
Step-by-step explanation:
divide all sides by 4