Answer:
Step-by-step explanation:
The idea is to find out how much steel it takes to make 1 rod, then multiply that amount by 192. The amount of steel in a rod is found in the volume of steel in each rod. The formula for the volume of a cylinder is
For us this formula looks like this:
which, in terms of pi, is 240π. That's not a very useful measure, so rounded to the nearest whole number, each rod take 754 cubic centimeters of steel. Multiply that by 192 and you get that you need
144,768 cubic centimeters of steel to make 192 rods of that size.
Let the number be x.
Then, the number increased by 3 will be x + 3.
<u>According</u><u> </u><u>to </u><u>question</u><u>,</u>
x(x + 3) = 54
x² + 3x = 54
x² + 3x - 54 = 0
<u>By middle term factorisation</u>,
x² + 9x - 6x - 54 = 0
x(x + 9) - 6(x + 9) = 0
(x + 9)(x - 6) = 0
<u>Equating </u><u>to </u><u>zeroes </u><u>and </u><u>we </u><u>get,</u>
x + 9 = 0
x = -9 (First value)
and,
x - 6 = 0
x = 6 (second value)
I hope this helps
sinA=BC/AB
sinA=8/10=0,8
cosA=AC/AB
cosA=6/10=0,6
7y - 23 + 23x -16 + 8x - 21
31x + 7y - 60
What is the original problem equal to? You can't go any further unless you know.
X= -5/7
y= 44/7
Hope this helps!!
