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salantis [7]
3 years ago
11

It has been estimated that a student’s final grade in a course decreases by 5 points for every 2 days absent from class. If a st

udent misses 4 days, by how many points will the student’s final grade decrease?
Mathematics
2 answers:
cluponka [151]3 years ago
8 0

10 points, 2 times 4 equals 10 points.


Vlad [161]3 years ago
5 0

For this case we can make the following rule of three:

5 points --------------> 2 days

x -----------------------> 4 days

From here, we clear the value of x.

We have then:

x =\frac{4}{2} * (5)

x = 2 * 5\\x = 10

Answer:

The student's final grade will decrease about:

x = 10 points

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3 years ago
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Atalien is 5 feet tall. His shadow is 8 feet long. At the same time of day, a tree's shadow casts a 32 feet long shadow. What is
erma4kov [3.2K]

Answer:

The tree will be 20 Ft

Step-by-step explanation:

5:8

?:32

8×4=32

5×4=20

20 is the answer

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3 years ago
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Lonnie plans to join the gym. He must pay a $35 membership fee. He will
mash [69]

Answer:

5

Step-by-step explanation:

The slope will be the constant amount that the cost increases by each month.

In this situation, 5 is the slope, because he has to pay $5 each month.

35 is not the slope, and is instead the y intercept. This is because this is the cost at 0 months, since it is the membership fee.

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4 0
3 years ago
At the local pet store, zebra fish cost $2.00 each and neon tetras cost $2.15 each. If Ernesto bought 15 fish for a total cost o
bezimeni [28]
So first create and define your variables:
Z = amount of zebra fish
N = amount of neon tetras

Now create your equations:
2z+2.15n=31.20
z+n=15
This is your system. There are multiple methods to use but in this problem I’ll use the substitution method by simplifying the bottom equation.
2z+2.15n=31.20
z=15-n
Now I’ll plug the bottom equation into the top one.
2(15-n)+2.15n=31.20
And just solve from here.
30-2n+2.15n=31.20
0.15n=1.20
n=8
So he bout 8 neon tetras, and 15-8= 7, so he bought 7 zebra fish
6 0
3 years ago
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Sav [38]
The answer is D

See attached picture:

8 0
3 years ago
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