If x=2 is a solution of the equation1/9{1/6[1/3(x+a/2 + 4)-7]+10}=1,then a=_______

If x=2 is a solution of the equation 1/6[1/3(x+a/2 + 4)-7]-1/2=1,then a=____急 If x=2 is a solution of the equation1/9{1/6[1/3(x+a/2 + 4)-7]+10}=1,then a=_______ If the solution of the inequality ≥2 is the set (－3,－1),then the parameter a is . 英语翻译【If 2 percent of a 12-gallon solution is sodium,how many gallons of pure sodium must be added to make a new solution that is 6 percent sodium?】请翻译上面【】裏面的内容, 线性相关证明题If η is a solution of AX=b ,which and R(A)=r.Letζ1ζ2ζ3ζ4ζ5 be a basis of the solution space of AX=0.Show η ζ1ζ2ζ3ζ4ζ5 that are linearly independent. 一道gre数学题By weight,liquid A makes up 7.0 percent of solution 1 and 14.5 percent of solution 2.If 3grams of solution 1 is mixed with 2 grams of soluiton 2,then liquid A account for what percent what percent of the weight of the resulting solu 一道sat数学真题,if a number is chosen at random from the set {-12,-6,0,6,12}.what is the probability thatit is a member of the solution set of both 2x-3-6?(A)0 (B) 1/5 (C) 2/5(D) 3/5 (E)4/5c是对的， 英语翻译If the linear function y=ax+b passes through the point (-2,0),but not the first Quadrant,then the solution set for ax>b is ( ). The number of the integral solution of the equation(x+1)^2+(y-2)^2=50 is -----this is a good solution depends on ----you look at it.A.whether,what B.whether,howC.if,the way D.if,when 一道数学题,用方程解,Assuming k is an integer,if equation 7x-5=kx+9,with respect to x,has positive integer solution,values of k are (a) Find the value of A so that the equation y ' - xy - 6x = 0 has a solution of the form y(x) = A + Be^((x^2)/2) for any constant B. A=?(b) If y(0) = 5, find BB=? How to solve The number of real solution to the equation x/sinx=100 is Find the inflection points,if any,of the following function.Otherwise,answer no solution?f(x) = x^4 - 2x^3 +5 f(x) = 2/(1+x^2) Exercise 1.Consider the following system of linear equations where a is a number:2x + 3y - z = a-4x - 6y = a-x- z = a注：这仨是个方程组 大括号打不进来a) For what values of a does the system above have a unique solution?b) For what val 5x+cosx=0show that the equation 5x+cosx=0 has a solution.Are there many solution? DIvide x3+x2-14x-24 by x+2Solution x2-x-12/)x-2)x3+x2-14x-24x3+2x/-2x2-14x-x2-2x/-12x-24-12x-24/0In this example we see that x+2 is a factor of x3+x2-14x-24,as the remainder is zero.Thus x3+x2-14x-24÷（x+2）=x2-x-12 with zero remainderso x3+x2-14x 线性代数中线性组合的问题A vector b is a linear combination of the columns of a matrix A if and only if the equation Ax=b has at least one solution True 根据定理 不是应该仅有一解才行吗