statistics
1. 35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected
General Chemistry
How many milliliters of 0.5M NaOH must be added to 200 mL of 0.1M NaH2PO4 to make a buffer solution with a pH of 6.9?
Proportions
there were no brackets it was just written out as this well on mine it was. 3y-8/12=y/5 if anyone can help me id gladly appreciate it thankz
science
What is itvbarnoeso unscrambled ?
Precalculus
invests 7000 for 1 year part at 5% part at 11% and the remainder at 13% total amount of income from these investments was $774. The amount of money invested at 13% was $1200 more than the amounts invested at 5% and 11% combined find the amount invested at each rate
Probability please help!
It means that numbers 2,3,7 have to be first so combination choose 3 out of 5 and then either 4 or 8 can be in the end which can be done in 2! ways. So 20ways out of possible 5!=120 so 20/120= 2/12=1/6
maths project
which ratio do you want? girls are 20 out of total 46 so 20:46 ie 10:23 and boys are 26:46 ie 13:23. Unless you want to find the ratio between girls and boys?
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