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Lelu [443]
3 years ago
7

John's grades in Algebra are: 65, 83, and 93. What grade does John need on the final exam to get an 85

Mathematics
1 answer:
hoa [83]3 years ago
8 0

Answer:

99 marks

Step-by-step explanation:

Let 'x' be the mark in final exam

Sum of all the data's/ Number of data's = Mean

\frac{65+83+93+x}{4}=85\\\\\\\frac{241+x}{4} = 85

241 + x  = 85*4

241 + x = 340

       x = 340 - 241

x = 99

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daser333 [38]
<h3>Answer:</h3>

  7)  0.76 is a rational number

  8)  The list of favorable outcomes is {orange pop #1, orange pop #2}.

<h3>Step-by-step explanation:</h3>

7) The product 0.4 × 1.9 is 0.76. This is not an integer, whole number, or natural number. It is a decimal fraction of finite length, so is a rational number.

___

8) Often, a problem of this sort will ask for the probability of an orange pop outcome. This problem doesn't ask that. Rather it asks what the possible orange pop outcomes are. Drawing one orange pop from the box will give you one of ...

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  • orange pop #2

These are the possible outcomes.

5 0
3 years ago
A study has shown that the daily amount of milk produced by a dairy cow is
8090 [49]

Answer:

A

Step-by-step explanation:

this is more of a mind game.  Lots of words to throw you off.  Daily a cow produces a mean of 6.2 gallons (average of 6.2 gallons, meaning they already found the mean, "averaged" it out for you) with a deviation of .7 gallons ("give or take" .7 gallons).  On any given day (throw these words out) 68% of the cows (don't need this information to answer the question either, thrown in to confuse you) will produce an amount of milk within which of the following ranges?  Just subtract the deviation ("give or take number") .7 gallons from the mean (average (already determined)) 6.2 gallons which is 5.5 gallons THEN add the deviation ("give or take number") .7 gallons to the mean (average (already determined)) 6.2 gallons which is 6.9 gallons.  Your answer is A 5.5 gallons to 6.9 gallons.     You don't even have to go crazy on the math on this question you can rule them all out but A immediately with subtracting .7 from 6.2.  Mind games .... LOL sneaky.  

6 0
3 years ago
A bag of 12 ounces of popcorn costs $4.80. What is the unit rate? (in others words what is the cost for one ounce) *​
masha68 [24]

Answer:

0.4

Step-by-step explanation:

$4.80 divided by 12 = 0.4

5 0
3 years ago
Read 2 more answers
You deposit $200 in an account earning 3.5% simple interest. How many years will it take for the balance of the account to be $2
sweet [91]
I = PRT

21 = 200 * 0.035 * T

21 = 7T

3 years = T
3 0
3 years ago
A first number plus twice a second number is 4. Twice the first number plus the second totals 20. Find the numbers
pychu [463]

Answer:

The first number is 6

The second number is -1

6+(-2)=4

6*2=12 12+(-1)=11

Step-by-step explanation:


4 0
3 years ago
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