Mathematics
Mathematics, 17.04.2020 04:59, zekrader18

1. In 1983 the composition of pennies in the United States was changed due, in part, to the rising cost of copper. Pennies minted after 1983 weigh 2.30 grams while the earlier copper pennies weigh 3.01 grams.

A roll of pennies contains 50 coins. If a particular roll of pennies weighs 133.46 grams, how many of the old heavier pennies and how many of the new lighter pennies does this roll contain? (LT#4.12)

x + y = 50

2.3x + 3.01y = 133.46

Suppose you weigh a roll of pennies on a scale which only reads the weight to the nearest gram. The scale says that the roll of pennies weighs 143.40 grams. What can you conclude about the pennies in this roll? (LT#4.12/4.14)

2. Using technology, construct a system of two linear equations where (-2,3) is a solution to the first equation but not to the second equation, and where (-2,7) is a solution to your second equation but not your first and they have no solutions in common. Write your system of equations and explain how your graph shows that your system satisfies the required conditions. (LT#4.15)

3. All the horses and cows in a pasture have a total of 50 heads and 200 legs.

The system of equations for this would be, when x = # of horses and y = # of cows

Find a solution to the system and write a sentence interpreting the solution? (LT#4.15)

x + y = 50

4x + 4y = 200

desmos can help

answer
Answers: 1

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 20:30, tatipop49
In an improper fraction, is the numerator equal to, less than, or greater than the denominator
Answers: 2
image
Mathematics, 21.06.2019 20:50, brea2006
An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.
Answers: 3
image
Mathematics, 21.06.2019 22:30, Backfire3607
Using the figure below, select the two pairs of alternate interior angles. a: point 1 and point 4 b : point 2 and point 3 c: point 6 and point 6d: point 5 and point 7
Answers: 2
image
Mathematics, 22.06.2019 00:00, Angelofpink1143
What is the area of the shaded sector?
Answers: 2
Do you know the correct answer?
1. In 1983 the composition of pennies in the United States was changed due, in part, to the rising c...

Questions in other subjects: