X-rays? What’s the question
Answer:
is it a SAT or any other subject question as I am not able to understand.
being a student who is preparing for SAT, it is my curiosity that has peaked so please regard my question.
2/3 miles
------------
1/3 hour
copy dot flip
2/3 * 3/1
2 miles per hour is the unit rate
Answer: 2 miles per hour
Answer: A: Yes, point D is the point of intersection of segments drawn from all three vertices
Explanation: it was correct on edg
Answer:
3 groups of 5
Explanation:
if x is the number of groups of four, and y is the number of groups of five, then 4x +5y =39 (four students per group of four times the # of groups of four, and 5 students per group times the # of groups of five, which should equal the total amount of students, 39). also, x+y=9. (number of each type of group = 9 groups total).
then, use these two equations and solve for y, by "canceling out" x. there are many ways to do this, but i'm going to use subtraction.
4x-5y=39
x+y=9
you want to change the equation
x+y=9
into
4x+4y=36
by multiplying the whole equation by four. because in order to cancel out the x, you need it to equal zero. in the first equation, its 4x.
so its now
4x-5y =39 MINUS
4x+4y=36
___________
y=3
you can check your work because the remaining 6 groups of four (24 total students) plus the 3 groups of five (15 total students) adds up to equal 36
