a+b+c=9 and a2+b2+c2=35 then by using identity
(a+b+c)2=a2+b2+c2+2ab+2bc+2ca,we get the answer 9x9=35+2(ab+bc+ca)
2(ab+bc+ca)=9x9-35
2(ab+bc+ca) =81-35then we get ab+bc+ca=46/2 so ab+bc+ca=23
Answer:B
Step-by-step explanation:
Answer:
(1-5)/(-2+2)= -4/0 is undefined
Answer:
Step-by-step explanation:
1) a + $5.92 = $12.29
subtract 5.92 from both sides
a = $6.37
Third option, a = $6.37
2) Multiply the equation by j to get it to the left side
42 = 6j
Divide both sides by 6
42/6 = 7
Answer: 7
3) 9 + 8 = 17 No
9 x 3 = 27 Yes
9 + 3 = 12 No
9 - 5 = 4 Yes
9/3 = 3 No
4) 15.32 + c = 29.00
c = 13.68 is the most expensive you can go, so it would be the soccer ball, since it is the most expensive item under 13.68.
5) 6 x 6 = 36 . False
5 + 6 = 11 . True
6/2 = 3 . True
17 - 6 = 11 True
Hope this helps :)
The answer is 345 students.
I did reverse math(i don't remember the name)
138/.4=345
Now check it:
345*.4=138
I hope I helped somehow!
