Multiply the first equation by -2. It turns into 4x+18y=50 and the other one stays -4x-9y=-23. Then you "eliminate" the equations by "adding" them. Set it up like this:
4x+18y=50
+
-4x-9y=-23
4x-4x= 0. 18y-9y= 9y and 50-23= 27
SO: 9y= 27 and y= 3
And then you plug that in to one equation: 4x +18(3)= 50. 4x= 50-(18*3)
4x= -4, so x=-1.
Plug it back in to check!
Hope this helps. Happy solving! :)
The first and last choices are true.
Answer:
2.40/10 = 0.24 per Oz
2.08/8 = 0.26 per Oz.
so yes, 10 Oz. for 2.40 is a better deal
Step-by-step explanation:
your are welcome
<h2><u>Anѕwєr :</u></h2>
48/15 or 3 whole 3/15
<h2><u>Explαnαtion :</u></h2>
There are 4 pizzas and each have 12 slices. So,
→ Number of slices each pizza have = 12 slices
→ Number of slices 12 pizzas have = (12 × 4) slices
→ Number of slices 12 pizzas have = 48 slices
Now, we have to find the number of slices each person get if they are split evenly.
→ Number of people = 15
Let the the number of slices each person get if they are split evenly be x. So,
→ Total number of slices = Number of people × Number of slices each gets
→ 48 = 15x
→ <u>48/15 or 3 whole 3/15 = Number of slices each gets</u>
Therefore, the number of slices each person get if they are split evenly is 48/15.
Answer:
85,1 ft^2
Step-by-step explanation:
Semicircle area : 4^2π / 2 = 8π = 25,1 ft^2
Triangle area : (8 x 15) / 2 = 60 ft^2
Total Area = 60 + 25,1 = 85,1 ft^2
