U should look these up on mathway
Answer:
Step-by-step explanation:
Scale= length on drawing / actual length
Let the actual length b x
3:10=2/5/x
3/10=2/5x
Cross multiply
15x=20
x=4/3
The actual length is 4/3
Replace X in the equation with the values in the table and calculate:
2X-5:
2(-4) -5 = -8 -5 = -13
2(-2)-5 = -4-5 = -9
2(1)-5 = 2-5 = -3
2(3)-5 = 6-5 = 1
2(5)-5 = 10-5 = 5
The number of positive and negative roots or zeros of a polynomial function is predicted through the Descartes Rule of Sign. This was first described by Rene Descartes in his work La Geometrie. The technique is for determining an upper bound on the number of positive and negative real roots.
Answer:
71.57
Step-by-step explanation:
