X=3,-2 you solve by using the quadratic formula
Answer:
Step-by-step explanation:
If I have 90 pounds shared between A, B, and C, then in a mathematical equation,
A + B + C = 90
However, we have way too many unknowns.
We are told that the ratio of A to B is 1 to 2, or
and cross multiplying,
2A = B or ![A=\frac{1}{2}B](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B1%7D%7B2%7DB)
We are also told that the ratio of B to C is 4 to 3, or
and cross multiplying,
3B = 4C or ![C=\frac{3}{4}B](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B3%7D%7B4%7DB)
Now we have everything in terms of B, so we will rewrite it like that:
, and
and
9B = 360 so
B = 40. If B is 40 and A is half of B, then A is 20.
Answer:
A' (- 1, - 5 )
Step-by-step explanation:
Under a counterclockwise rotation about the origin of 90°
a point (x, y ) → (- y, x ), then
A (- 5, 1 ) → A' (- 1, - 5 )
Answer:
80, because there a 16 cups in one gallon and 5 gallons
Step-by-step explanation: