Answer:
3(x-y)
Step-by-step explanation:
Answer:20 girls
Step-by-step explanation:the difference between 3 and 4 is one so there will be a difference of one between the 2 questions.
Answer:
5x + (- 1)
Step-by-step explanation:
So the terms are 2x, -5, 3x, and +4.
2x and 3x have x in common so they can be combined to create 5x.
-5 and +4 don't have variables, so they are also common and can be combined to make -1.
2(m+n) is the answer. The question is asking for the sum of m and n then multiplying that sum by 2
Answer: Kristin bought 6 Math books and 5 English books.
Step-by-step explanation: Let x be the number of math books and y the number of english books.
Relation: 306=26x+30y
11=x+y
Solve using elimination method so you would get that y=5 then replace y=5 in the first equation to find x which is 6
