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igomit [66]
3 years ago
13

A bag contains 100 marbles, some red and some purple. Suppose a student, without looking, chooses a marble out of the bag, recor

ds the color, and then places that marble back in the bag. The student has recorded 9 red marbles and 11 purple marbles. Using these results, predict the number of red marbles in the bag.​
Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
8 0

Answer:

45

Step-by-step explanation:

9 of the 20 drawn were red

9/20 * 100 = 45

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Harlamova29_29 [7]
FC is median..

Median is a line from a vertex that equally divides the opposite side...
here FC divides DB therefore it is a median.....



HOPE IT HELPS YOU '_'
8 0
3 years ago
Read 2 more answers
The graph of f(x) = x2 + x - 6 is shown below.
guapka [62]

Answer:

the solutions of a function are the points where for some value of x the function becomes zero

thus the solns for this graph would be

<h3>-3 , 2</h3>

that's option 1.

3 0
2 years ago
5 brothers want to share the cost of a birthday gift for their mom. The youngest brother is too small to get an allowance so the
liberstina [14]

Answer:

<em>Total cost=$73.60 </em>

Step-by-step explanation:

<u>Arithmetics To Solve Simple Problems </u>

Sometimes the use of the most basic operations can be handy to solve problems of a variety of complexities without the use of equations or algebra. We'll approach to the solution of this question by pure logic and basic operations.

If the gift was originally meant to be paid for all 5 brothers, each one would have paid one-fifth of the cost. But since the younger brother won't be paying anything, the cost will be divided among the other four brothers, each one of which will pay now one-fourth of the cost. But this new division is $3.68 more than the previous one. If we take the difference between both fractions, we get

\displaystyle \frac{1}{4}-\frac{1}{5}=\frac{1}{20}

That fraction is the portion of the money they are paying in excess, so the total cost should be twenty times that excess, i.e.

Total cost= 20*3.68=$73.60

Let's check. Each brother should have paid $73.60/5=$14,72. But the four brothers really paid $73.6/4=$18.40. The difference is cost is $18.40-$14,72=$3.68 as required

5 0
3 years ago
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Aliun [14]

Answer:

2x^2 + 3x + 2

Step-by-step explanation:

Like terms must have exactly the same variables and exponents on the variables.

2x^2 is not a like term to any other term, so it cannot be combined.

3x is not a like term to any other term, so it cannot be combined.

3 and -1 have no variable, so they are like terms and can be combined.

2x^2 + 3 + 3x - 1 =

= 2x^2 + 3x + 3 - 1

= 2x^2 + 3x + 2

4 0
3 years ago
Find an equation for the line below
Alexandra [31]
Y = 6/9x + 1
Rise/run
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3 years ago
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