Mrs. Hernandez bought 18 pens for her class. Highlighters cost $3 each, and gel pens cost $2.50 each. She spent a total of $50.
Use a system of equations to find the number of highlighters and gel pens Mrs. Hernandez bought.
2 answers:
Answer:
Step-by-step explanation:
Let
x------> the number of highlighters
y-----> the number of gel pens
we know that
------> equation A
------> equation B
The intersection point both graphs is the solution of the system of equations
using a graphing tool
The intersection point is
see the attached figure
therefore
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Answer:
15 muffins are cinnamon.
Step-by-step explanation:
Given that:
Number of muffins baked = 50 muffins
Chocolate chip muffins = 1/5 of 50 =
Chocolate chip muffins = 10 muffins
Blueberry muffins = 1/2 of 50 =
Blueberry muffins = 25
Cinnamon muffins = Muffins baked - chocolate chip muffins - blueberry muffins
Cinnamon muffins = 50 - 10 - 25
Cinnamon muffins = 50 - 35 = 15
Hence,
15 muffins are cinnamon.
The required value of mean and variance is 203 and 3942 respectively.
Hence option B is correct.
The sample includes the following claims: 192, 113, 200, 287, and 225.
<h3>What is Statistic?</h3>The statistic is the study of mathematics which deal with relations between comprehensive data.
Mean(x) = 192+113+200+287+225/5
x = 203
variance =
=summation of squared value/n^2−1
=15769/25−1
=15769/24
=3942
Thus, the required value of mean and variance is 203 and 3942 respectively.
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