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s344n2d4d5 [400]
2 years ago
10

Ms. Thompson reported her students' scores on their most recent test. How many students scored at least 80

Mathematics
2 answers:
Anna11 [10]2 years ago
7 0

Answer:

5

Step-by-step explanation:

5 scored in the 80's and 0 scored in the 90's

anything less than 80 would not be counted

PilotLPTM [1.2K]2 years ago
3 0

Answer: I think it's 85 , I hope this helped if not I totally understand .

Step-by-step explanation:

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HELP!!! Anyone know how to solve I know the answer is (-3) but I don’t know how to get there. Thanks!!
Dima020 [189]

Answer:   v = -3

=========================================

Work Shown:

5 = \sqrt{-2-6v}+1\\\\5-1 = \sqrt{-2-6v}\\\\4 = \sqrt{-2-6v}\\\\4^2 = \left(\sqrt{-2-6v}\right)^2 \ \text{ .... square both sides}\\\\16 = -2-6v\\\\16+2 = -6v\\\\18 = -6v\\\\-6v = 18\\\\v = 18 \div (-6)\\\\v = -3

As you can see, we don't square both sides until the square root portion is fully isolated or on its own side. So it happens after we subtract 1 from both sides.

Technically, you are able to square both sides without first isolating the square root. But that would mean you'd have to use the FOIL rule and things would get a bit messier than they have to be. Not to mention that the square root term wouldn't fully go away (so you'd have to square again later down the line).

------------------

Checking the answer:

Replace every copy of v with -3. Simplify both sides. We should end up with the same number on each side

5 = \sqrt{-2-6v}+1\\\\5 = \sqrt{-2-6(-3)}+1\\\\5 = \sqrt{-2+18}+1\\\\5 = \sqrt{16}+1\\\\5 = 4+1\\\\5 = 5\\\\

The answer is confirmed.

4 0
3 years ago
Original cost: $1.25;markup %:80%
Sholpan [36]
Hey!

Find 80% of the original cost:

1.25 * 80% = 1

1.25 + 1 = 2.25

ANSWER: $2.25.
8 0
2 years ago
The temperature in degrees Fahrenheit of a corpse t hours after death is 58+40e−t/2458+40e−t/24. What is the temperature of the
jolli1 [7]

Answer:

58+40e−t/2458+40e−t/24

step by step explanation:

Normally, the temperature of a corpse is the temperature of the surrounding environment.

This is done by losing or gaining heat to equilibrate to that of the surrounding.

Let's assume that the final temperature of the corpse is after t hrs.

Then the temperature of the surrounding in degree Fahrenheit is equal to 58+40e−t/2458+40e−t/24

7 0
3 years ago
Read 2 more answers
Can u helppp I got stuck in the middle of this
alexandr1967 [171]

Answer:

ok bud look in this link

Step-by-step explanation:

ly/hshsuu3727 that has your answer and it looks pretty legit

4 0
2 years ago
Which of the following is not a possible cross section of a cylinder
SVEN [57.7K]

Answer:

Square

Step-by-step explanation:

The only possible cross section of the cylinder is a circle or a rectangle. I mean, depending on how tall it is.

6 0
3 years ago
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