Answer:
15 black water bottles
Step-by-step explanation:
let w represent white water bottles, and let b represent black water bottles.
set up a system of equations:
w+b=20
w+2b=35
(the top equation shows that the number of white water bottles he sold and the number of black water bottles he sold equals to 20, since it says that the total number of water bottles is 20. the bottom equation shows that white water bottles cost $1, and black water bottles cost $2, and that the total amount of money he got from selling them is $35).
in the top equation, isolate w:
w+b=20
w=20-b
now we do substitution. in the bottom equation, substitute 20-b for w:
w+2b=35
20-b+2b=35
then, solve:
b+20=35
b=15
this means that he sold 15 black water bottles.
Answer:
Proved
Step-by-step explanation:
Answer:
108 ft squared.
Step-by-step explanation:
The figure is made up of a triangle and a square.
The area of a triangle is (1/2)*b*h. The height of the triangle is 6 ft and the base is 9 ft, since the triangle shares a side with the square. Since all sides of the square are equal we know that the line that is shared by the triangle and the square must also be 9ft.
Area of the triangle: (1/2)*9*h = 27 Square feet
To find the area of a square you multiply b*h or sides squared
Area of the square: 9*9 = 81 squared feet
<em>Finally, you have to add the two areas together to get the overall area.</em>
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So, 27 Feet Squared + 81 Feet Squared = 108 Feet Squared
I’m pretty sure it’s b because they are camouflaged
Just use an online calculator! i promise you they work better than this.
