Sonji has $5.25 in nickels and dimes. the coin value can be modeled by the equation 0.100 +0.05n=5.25, where d represents
the number of dimes and n represents the number of nickels. if sonji has 21 dimes, how many nickels does she have?
35
42
63
105

Does anyone know how to do geometryme with this problem

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

Simplify. 4+3/7x-2-2/7x a. 2-5/7x b. 6-1/7x c. 2+1/7x d. 6+5/7x