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Earn +20 ptsQ: What is 18x sqr - 63x equals 81 divided by 9 equals?
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What number raised to the fourth power equals 625?
54 = 625 (to find out sqr rt 625 then sqr rt again)
Without a calculator how can theta be determined from the expression tan theta equals sqr of 5?
I'm asuming you meant "ten theta"the square of 5 is 2525 divided by 10 is 2.5so theta equals 2.5there you go =)
What is 320 equals 2X squared plus 12X?
320 = 2x^2 + 12x 0 = 2x^2 +12x -320 Using the quadratic formula x = (-12 + sqr(144+4*2*320))/4 and x= (-12 - sqr(144+4*2*320))/4 x =( -12 + sqr(2560))/4 = 9.649 to 3 d.p. and x=(-12 - sqr(2560))/4 = -15.649 to 3 d.p
231 sqr meter to sqr feet?
231 m2 is about 2,486.5 square feet.
How would you write square root -30?
sqr(-30) is i*sqr(30) We use i to represent the sqr(-1) because it is called an imaginary number. It takes an imagination to work with it. It is not fictitious.
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