Answer:
Step-by-step explanation:
5x^2 +3 = 83 . . . . given
5x^2 = 80 . . . . . . .subtract 3
x^2 = 16 . . . . . . . . .divide by 5
x = ±√16 = ±4 . . . take the square root
The smaller value of x is -4; the larger value, +4.
Answer:
it dropped 20°F
Step-by-step explanation: since its at -2°F, u subtract 18°F to get 0°F. Then you subtract another 2°F to get -2°F. hope this helped. Its pretty simple.
We will use the SAS (SIDE-ANGLE-SIDE) to prove that two triangles are congruent.