-3x-5y=-7
4x+5y=14
You can cross out -5y and 5y because they add to 0.
-3x=-7
4x=14
Combine:
x=7
Plug 7 into x into either of the two equations to solve for y.
4(7)+5y=14
28+5y=14
5y=-14
y=-14/5 or -2.8
Answer:
(-2, -3)
Step-by-step explanation:
y=2x + 1
y= 0.5x - 2
2x+1= 0.5x -2
1.5x= -3
x= -2
y= 2x+ 1
y= 2(-2)+1
y= -3
The solution is (-2,-3)
Answer:
for the first question the total bill is $35.524
for the 2nd question the answer is $36.36 = 110%.
$36.36 ÷ 1.1 = $33.054
(the five and the four are recurring)
(I divided by 1.1 because 1.1 is the same as 110%)
hope this helped :)
A triangle's sum must add to 180 degrees. If two of the angles, summed, equal 50 degrees, then the vertex angle must equal 130 degrees. So, the vertex angle equals 130 degrees.
First, we need to figure out 10% of fifteen.
So, we multiple 15 by 10% (or 0.1 in simpler terms).
That gives us 1.5, which is our mark-up price.
So, finally we add the markup price to the original price to obtain the selling price.
1.5 + 15 = 16.5
The owner charges $16.50 for 1kg of sugar!