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Sladkaya [172]
3 years ago
5

30 red marbles is 40% of ____ marbles

Mathematics
1 answer:
AlekseyPX3 years ago
7 0

Answer:

75

Step-by-step explanation:

Turn the percentage into a decimal.

40% -> 0.4

Divide.

30 / 0.4 = 75

Best of Luck!

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Solve the following proportion. 15/21=5/x<br> A. 3<br> B. 105<br> C. 7<br> D. not given
Slav-nsk [51]
If you would like to solve the following proportion 15 / 21 = 5 / x, you can do this as follows:

15 / 21 = 5 / x       /*x
15 / 21 * x = 5      /*21
15 * x = 5 * 21      /15
x = 5 * 21 / 15
x = 7

The correct result would be C. 7.
3 0
3 years ago
Read 2 more answers
Help me please, I’m still struggling with y intercepts, rates of change, etc.
BaLLatris [955]

Answer:

(a) The y-intercepts of both functions are the same, 0.  However, the rate of change for the school library is 0.25, while the rate of change for the city library is 0.35.  

(b) The 3-day late fee at the school library is $0.75 and the 3-day late fee at the city library is $1.05.

Step-by-step explanation:

The functions represented in the question are linear, which means that they have a consistent rate of change over time.  In this example, it means that for every day, the late fee charged by each library is the same.  At the school library, the rate of change is 0.25, which means for each day the book is late, the school charges a fee of $0.25.  At the city library, the table shows that for each day the book is late, the city charges a fee of $0.35.  So, the city library is more expensive.  Y-intercept refers to the initial cost, or how much do the libraries charge if the book is not late, or turned in on time.  In this case, neither library charges a fee for books turned in on time, so both would have a y-intercept of 0.  

5 0
4 years ago
How to find the property of a trapezoid
Igoryamba

Answer:

Your question isn't very specific.

The area of a trapezoid = ((sum of the bases) ÷ 2) • height

Trapezoid Diagonals: formulas are attached.

Step-by-step explanation:

3 0
3 years ago
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olchik [2.2K]

Answer:

4, 6, 8, 10 etc.

Step-by-step explanation:

A multiple is a number that can be divided by another number without a decimal or fraction left.

2 multiplied by any whole number that is positive is a multiple of 2.

so, 2*2=4

2*3=6

2*4=8

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etc.

7 0
3 years ago
15,789,200 what place is the eight in?
Mrrafil [7]
The eight is in the ten thousandths place
7 0
4 years ago
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