Mrs. smith bought pencils and spiral notebooks for her class. when she bought 60 pencils and 30 spiral notebooks, the cost was $33. when she bought 10 pencils and 20 spiral notebooks, the cost was $19. what is the price of 1 spiral notebook? what is the price of one pencil?

What are the domain and range of the function f(x)=2^x+1

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?