Answer: $0.70 per cookie
Which is the same as saying 70 cents per cookie
=============================================================
Explanation:
The unit rate is the cost of one cookie. The term "unit" means "one".
10 cookies = 7 dollars
10/10 cookies = 7/10 dollars ...... divide both sides by 10
1 cookie = 0.70 dollars
Since one cookie costs $0.70, the unit rate is $0.70 per cookie or you can say 70 cents per cookie.
<span>Solve the system
9x = 27-9y
20x=71-9y
Let's use the "elimination through addition/subtraction method.
Multiply the first equation by -1 so as to obtain +9y:
-9x = -27 + 9y
</span><span>20x= 71- 9y
--------------------
Add these 2 equations together:
</span>-9x = -27 + 9y
20x= 71- 9y
--------------------
<span> 11x = 44
Solve this for x: x = 44/11 = 4.
Now find y by subst. 4 for x in either of the original equations.
Using the second equation: </span><span>
</span>20x=71-9y
20(4) = 71 - 9y
80-71 = -9y
9 = -9y. Then y = -1.
The solution set is (4,-1).
Answer:
D
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
Hoped it helped
