Question:
sherri has 23 pieces of jewelry to sell. she sells the bracelets for $2 and the necklaces for $3, and earns a total of $55. if the bracelets are represented by x and the necklaces are represented by y, which of the following systems of equations can be used to calculate the number of bracelets and necklaces sold?

answer choices:
a. x + y = 23, 3x + 2y = 55
b. x + y = 55, 3x + 2y = 23
c. x + y = 23, 2x + 3y = 55
d. x + y = 55, 2x + 3y = 23

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed

Which of the following explains why a tree is often used as a model to represent the principle of common descent

Is this mrna or rna need need the answer in a hurry