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Ready4 Running at their respective constant rates, Machine X takes 2 days longer to produce w widgets than Machine Y. At these rates, if the two machines together produce \frac{5}{<font color='#FE8080'>4</font>}w widgets in 3 days, how many days would it take Machine X alone to produce 2w widgets?
Ready4

The dots on the graph above indicate the semester test averages and final exam grades for 40 students in Ms. Joshi's geometry class. How many students had a test average above a 90 and also scored above an 80 on the final exam?
If $$\sqrt {\frac x y}=n$$ what is the value of $$x$$?(1)$$yn=10$$(2)$$y=40$$ and $$n=\frac1 4$$
If $$\mid M+4\mid =2$$, what is the value of M?(1) M<0(2) $${M}^{2}+{8}{M}+{12}={0}$$
If a and b are positive integers, is $${2}{\sqrt{a+b}} >{4}\sqrt{b}$$?(1)b >3a(2)a + b >3
PREP07 Test 2 If c and d are integers, is c even? (1) c(d + 1) is even. (2) (c + 2)(d + 4) is even.
OG12 OG15 OG16 OG17 A bar over a sequence of digits in a decimal indicates that the sequence repeats indefinitely.What is the value of $$({10}^{4}-{10}^{2})(0.00\overline{12})$$?
PREP07 Test 1 List K consists of 12 consecutive integers. If -4 is the least integer in list K, what is the range of the positive integers in list K ?
Magoosh If 3 apples and 4 bananas costs $1.37, and 5 apples and 7 bananas costs $2.36, what is the total cost of 1 apple and 1 banana?
Ready4

How many 5-digit multiples of 3 can be formed using only the digits 0, 1, 2, 3, 4, and 5, without repeating any digits?
190321 $$y=a(x-h)^2-k.$$a=? 1: The functional image goes through (-3,0) and (1,0). 2: The functional image goes through (-1,4) and $$y \leq 4$$.
What is the value of$${1} \over{x^{2}-y^{2}} $$*$${-1}\over{x^{2}+2xy+y^{2}}$$?1.$$2y=x^{2}-y^{2}$$2.x+y=4
数论 Is three digit integer n divisible by 12?(1) n is divisible by 4.(2) The hundreds digit and the units digit of n are divisible by 3.
排列组合 There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks. How many possible selections of 4 books from this self include at least one paperback?
OG19-语文分册 OG20-语文分册 The passage suggests that, in the early 1990s, Michaels would have been most likely to agree with which of the following statements about the disparity mentioned in the lines 3-4?
191222 P（X）=ax²+bx+c，a≠0，P(-1)=0，P(3)=0. Is P(5)>0？
Condition 1: P(0)=3
Condition 2: P(-4)-P(-3)<0
191222 还原机经选题: 数论&amp;代数 Known that -1 and 3 are the two roots of f (x) = ax ^ 2-bx + c, Is f(1)>0？
(1)f(0)=2
(2)f(-3)>f(-4)
Ready4

At least  of 50 team members must receive an award individually from the state in order for the team as a whole to receive an award from the state. What is the greatest number of team members that could fail to receive an award individually from the state, if the team as a whole receives an award from the state?
OG12 OG15 If n is a positive integer, then n(n + l)(n + 2) is
应用题 150, 200, 250, n. Which of the following could be the median of the 4 integers listed above?I.175II.215III.235