Solve the system of equations using substitution.
y = −2x + 1
4x + 2y = −1
a.(0, −3)
b.(−3, 0)
c. no solution
d. infinitely many solutions

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2