if John has test scores of 90 and 76 with one test remaining to be taken, what score must he make on the last test to end up with an 86 average?

The last score must be 92%

Step-by-step explanation: To find the average, you add all the terms, then divide by the number of terms.

456567546657689765432567890-9876543567890-987657890

step-by-step explanation:

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐