If 7x - 15 = 34, then x equals? A. 7 B. 8 C. 9 D. 10 相关知识点: 试题来源: 解析 A。解析:由 7x - 15 = 34,移项得 7x = 34 + 15,即 7x = 49,两边同时除以 7,得 x = 7。选项 B、C、D 代入方程不正确。反馈 收藏 ...
Use rules of inference to show that if forall x(P (x) v Q(x)) and forall x((\neg P (x) wedge Q(x)) to R(x)) are true, then forall x(\neg R(x) to P (x)) is also true, where the domains of all quanti ...
If you divide 7x by x, would it be 7 or 6x? Operations on Algebraic Expressions: Addition of Algebraic Expressions: Like terms can be added, but unlike terms cannot be added. For example, 11pqand6pqcan be added, i.e.,11pq+6pq=(11×pq)+(6×pq)=pq(11+6)=pq×17=17pq, ...
If 7x-8y=9, then y=……….. 00:48 Slope of X-axis is ... 03:08 Angle between any two parallel lines is ……… 01:02 4m-2n=2,6m-5n=9 then n=……… 01:57 If m and n satisfy the equations, 3m - n = 40 and4m - 2n = 50, then m=... 02:15 2u+3y=2,4u-6y=0...
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百度试题 结果1 题目一道简单的英语数学题:If x²-7x+9=(x+a)²+b for all x,then what are the values of a and b 相关知识点: 试题来源: 解析 (x-7/2)^2-13/4==(x+a)²+b a=-7/2,b=-13/4 反馈 收藏
(c) For what value(s) ofbdoeslimx→−1f(x)exist? Lateral Limits: In some cases, when we study the behavior of a function f (x) at a pointx0,, We must specify what happens to the left and to the right of ...
一道简单的英语数学题:If x²-7x+9=(x+a)²+b for all x,then what are the values of a and b
Slope Intercept Form Slope X Y Bb C. asked • 10/11/17 Assume that y varies directly with x, then solve. if y=-18 when x=6, find x when y=6Assume that y varies directly with x, then solve. if y=-18 when x=6, find x when y=6...
insert an apostrophe is to use the VBA macro option found in this link:https://www.exceldemy.com/add-leading-apostrophe-in-excel/since it was the only way I could get the prefix apostrophe that is hidden and is flagged as 'Number formatted as text' warning, which I want for XLOOKUPs...