28 each book 155-15=140 and then 140÷5=28
<span>The answer is that 79 IS NOT correct because the riddle says "my ones digit is 2 LESS than my tens digit.." and 79 has 7 in tens and 9 in ones.</span>
Answer:
Step-by-step explanation:
48k+48=-3k-3
48k+45=-3k
-51k=-3
solving for k
.0588 or .059
We know all the side lengths so can use law of cosines. a=90, b=55, and c=50.
2500=8100+3025-2(90)(55)cos(C)
cos(C)=.8712
C=arccos(.8712)=29.4 degrees