first, find the ratio of 30/24
30/24=
15/12=
5/4
25 divided by 5/4= 20
101.15
Explanation:
140 x 7.25% = 10.15
140 x 35% = 49
Then we add the tax and subtract the sale :
140 + 10.15 - 49 = 101.15$
Hope it’s right
Best luck with your studying
Answer:
The answer is C
Step-by-step explanation:
3 BC = EF
3 AC = DF
Put the numbers where the corresponding variables are, then do the arithmetic.
... 20·3 + 25·4 -10 = 60 +100 -10 = 150
You can see almost immediately that the second equation, 3x + y = -2, can be solved for y: y = -3x - 2. (Answer A). This -3x - 2 can in turn be subbed for y in the first equation, 4x + 3y = 4. Doing so, we get 4x + 3(-3x - 2) = 4.
Carrying out the indicated opeations: 4x - 9x - 6 = 4, or -5x = 10. Thus,
x = -2. Find y using y = -3x - 2 (from above): y = -3(-2) - 2 = 4.
Thus, the solution is (-2,4). We were not asked to solve this system of equations, but doing so illustrates the helpfulness of elimination of variables in solving simultaneous equations.
