Answer:
B
Step-by-step explanation:
A. these simply to 21 + 7x and 21 + 3x
- this one is incorrect because the 7x and 3x are different
B. these simplify to 10 + x and 10 + x
- this is the correct one since they are exactly the same
C. these simplify to 21x and 7x + 21
- these two are not the same because one expression has only a number with a variable but the other one has a number with a variable <em>and </em>another number
D. these simplify to
and 
- in subtraction, the order of the 3 and the x matters, so the equations are not the same
- example: 6 - 4 = 2 but 4 - 6 = -2
Answer:
x > 4
Step-by-step explanation:
Calling x the number of days Rita needs to bake the total amount of cakes, then inequality is x*8 > 32. Because she has orders for more than 32 cakes and can make 8 cakes per day. Dividing by 8 every side of the inequality gives: x > 4. Graph of the solution is attached (notice that 4 is not included).
Answer:
✔ a/f
✔ cf
✔ c/b
✔ cf + ec
✔ c
Step-by-step explanation:
just did it on edg
Answer:
90 cookies would be served to 30 students.
Step-by-step explanation:
First, simplify the first ratio given to us.
45/15 = 3/1
Every student is given 3 cookies. You are now serving 30 students. To solve, multiply 3 with 30.
3 x 30 = 90
90 cookies would be served to 30 students.
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Answer:
x =
Step-by-step explanation:
Decimal Form:
x = 8.5
Mixed Number Form:
x = 