2(3u-8)= 38
6u-16=38
take 16 on the other side..
6u = 38 +16
6u = 54
u = 9
Answer:
1. b ,2.c ,3.b
Step-by-step explanation:
Answer:
98 pounds
Step-by-step explanation:
Let A be pounds of A-type coffee and B be pounds of B-type coffee.
We can set-up two equations and solve simultaneously.
<u />
<u>"This month, Hong made 170 pounds of the blend":</u>
![A+B=170](https://tex.z-dn.net/?f=A%2BB%3D170)
<u>"Type A coffee costs Hong $5.75 per pound, and type B coffee costs $4.10 per pound ... a total cost of $858.70":</u>
![5.75A+4.10B=858.70](https://tex.z-dn.net/?f=5.75A%2B4.10B%3D858.70)
Now we can multiply first equation by -5.75 and then ADD UP this new equation and equation 2 to get B. We have:
![(-5.75)*(A+B=170)\\-5.75A-5.75B=-977.5](https://tex.z-dn.net/?f=%28-5.75%29%2A%28A%2BB%3D170%29%5C%5C-5.75A-5.75B%3D-977.5)
Now solving for B:
![-5.75A-5.75B=-977.5\\5.75A+4.10B=858.70\\-------------\\-1.65B=-118.8\\B=72](https://tex.z-dn.net/?f=-5.75A-5.75B%3D-977.5%5C%5C5.75A%2B4.10B%3D858.70%5C%5C-------------%5C%5C-1.65B%3D-118.8%5C%5CB%3D72)
B = 72
Now plugging in this value into B of original first equation and solving for A gives us:
![A+B=170\\A+72=170\\A=170-72\\A=98](https://tex.z-dn.net/?f=A%2BB%3D170%5C%5CA%2B72%3D170%5C%5CA%3D170-72%5C%5CA%3D98)
<em>Thus, he used 98 pounds of Coffee A.</em>
Answer:
![560v^{10}u^{4}](https://tex.z-dn.net/?f=560v%5E%7B10%7Du%5E%7B4%7D)
Step-by-step explanation:
Simplify the expression.
Answer:
6 is answer...............