2018年4月13日 · the answer is 2(x-7)(x+5) first you have to take out(aka find what they have in common) which would be 2 so you'll have 2(x^2-2x-35) and now you have to worry about the parenthesis and factor so you'll now have (x-7)(x+5) but you still have the 2 so you have to put that at the front first.

2017年5月31日 · Co-efficient of x^4 is 1120 (x+2)^8= x^8+nc_1x^7*2^1+nc_2x^6*2^2+nc_3x^5*2^3+ nc_4x^4*2^4+.....+2^8 Co-efficient of x^4 is nc_4*2^4 = (8!)/(4!*4!)*16=70*16=1120[Ans] Precalculus Science

2016年9月30日 · 31.5 By definition, 70% means "seventy parts over a hundred of something, and again, this means that you must divide your quantity in 100 pieces, and then consider only 70 of those pieces. This should clarify how we must behave: Divide 45 in a hundred parts: 45/100=0.45. This is a part every 100 of 45, namely the 1% of 45. We want 70 of these little pieces, so we take 0.45*70=31.5. This is the ...

2016年11月14日 · Multiply by 7/10 100%=10/10; so clearly 70% of x = 0.70xxx or 7/10xx x.

2017年5月19日 · See a solution process below: "Percent" or "%" means "out of 100" or "per 100", Therefore 2.4% can be written as 2.4/100. When dealing with percents the word "of" means "times" or "to multiply". Finally, lets call the number we are looking for "n". Putting this altogether we can write this equation and solve for n while keeping the equation balanced: n = 2.4/100 xx 70 n = 168/100 n = 1.68 2.4% ...

2015年8月24日 · d/dx(4^x) = 4^x ln4 In general for b>0, we have d/dx(b^x) = b^x lnb And when we need the chain rule, we have d/dx(b^u) = b^u (lnb) d/dx(u) Proof of General rule b^x = (e^lnb)^x " " (remember that e^lnu = u) So b^x = e^(xlnb) " " (because (a^r)^s = a^(rs) = a^(sr)) d/dx(e^(xlnb)) can be found by the chain rule: d/dx(e^(xlnb)) = e^(xlnb) d/dx(xlnb) = e^(xlnb) lnb " " (lnb is a constant) = b^x ...

2016年3月15日 · The original price of a DVD is represented by the variable x. If the DVD is discounted 45%, write a subtraction expression and a multiplication expression to represent its sale price? The value of facebook shares changed from $27.10 on the 8th June 2013 to $30.01 on the 15th June.

2015年9月26日 · lambda=c/nu The speed of light, c, equals the wavelength, lambda (pronounced lambda), times the frequency, nu, (pronounced noo). c=lambdanu c is a constant. It is usually given as 3.00xx10^8 m/s or 3.00xx10^10 cm/s rounded to three significant figures. Wavelength is measured in meters, centimeters, nanometers, etc...). Frequency has a unit of "1/s", which means 1 cycle per second. It is also ...

2015年4月17日 · Note that the image below is only for x in Q1 (the first quadrant). If you wish you should be able to draw it with x in any quadrant. Definition of sin(x) (side opposite angle x)//(hypotenuse) Definition of cos(90^@ -x) (side adjacent to angle (90^@-x))//(hypotenuse) but (side opposite angle x) = (side adjacent to angle (90^@-x) Therefore sin(x) = cos(90^@ -x) Similarly cos(x) = sin(90^@ - x)

2014年10月11日 · Electromagnetic radiation is made up of waves that are composed of photons which travel at the speed of light, c, in a vacuum, which is exactly 299,792,458 m/s, usually rounded to three significant figures as "3.00" x "10"^(8)"m/s". Ask your instructor for his or her preference. All electromagnetic waves have wavelength and frequency. The wavelength is the distance between two crests, and is ...