Answer:
x = 
or 0.706
or 1.735
Step-by-step explanation:
5x + 2y=7 ----->(eq 1)
- 2x + 6y=9 ----->(eq 2)
Multiply (eq 1) with 3
3×(5x + 2y) = 3×7
15x + 6y = 21 ----->(eq 3)
substract (eq 3) from (eq 2)
- 2x + 6y - (15x + 6y) = 9-21
- 2x + 6y - 15x - 6y = 9-21
- 2x - 15x + 6y - 6y = 9-21
-17x = -12
x = -12 ÷ -17
x =
put x = in (eq 1)
Algebraically you could represent it like this
2*5 + x*3 + y*4 = 25 Multiply 2*5
10 + 3x + 4y = 25 Subtract 10 from both sides.
3x + 4y = 15 Now try this. Let y = 2
3x + 4*2 = 15
3x + 8 = 15 Subtract 8 from both sides.
3x = 15 - 8
3x = 7 Ordinarily you would divide by 3 but the question doesn't let you.
7 is a neat number. You could use 4 + 3
So one answer is
2 fives.
3 Fours
1 Three
You could also do
2 fives
5 threes. Nothing says you must have a four.
You can also do.
3 fives
1 four
2 threes There is nothing to say you can't have another 5
The correct answer is: -tan 32degrees
Answer:
Given: 175 g/L
1 gram/liter = 0.06242796 pound/cubic foot
175 g/L * 0.06242796 pound/cubic foot= 10.924893 lb/ft3
So, a foam material has a density of 10.924893 lb/ft3 in units of lb/ft3
Step-by-step explanation:
