How many solutions does this system of equations have?
y=-3x+7
y=-3x-6

a. infinitely many
b. two solutions
c. one solution
d. no solutions

What is the number 321,000,000 in scientific notation? also what is the number? ?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

This is about circle theorems. someone asap : (