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matrenka [14]
3 years ago
11

The probability that you can randomly select a red marble from a group of 40 marbles is 720 how many red marbles are there

Mathematics
1 answer:
defon3 years ago
6 0
The answer is 28 red marbles
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Can someone put a website to help me understand this?
Alenkinab [10]

Answer:

67

Step-by-step explanation:

Since the diagonals in a rectangle are congruent, AC=BD and

7x+18=10x-3

We need to separate x -- to do that, we can first subtract 7x from both sides, resulting in

18=3x-3

Next, add 3 to both sides to get

21=3x

Divide both sides by 3 to get

x=7

Then, we just plug x into 10x-3 to get BD = 7*10-3 = 67

7 0
2 years ago
Seven more than one half a number as an equation
romanna [79]

Answer:

1/2x+7

Step-by-step explanation:

5 0
3 years ago
Which fraction is equivalent to 38%?<br> 3/8<br> 9/25<br> 19/50<br> 3 4\5
KonstantinChe [14]
In order to find a fraction, We know that a percentage is out of a 100. This means we can now place our fraction as:

38/100

In order to find the actual fraction, we will want to simplify. Lets find our least common factor and work down from there. Since we know that 2 can go into both of them, lets reduce by 2.

This means our fraction will now look like: 

19/50

Since 19 is a prime number and cannot be divided by anything but 1 and itself, we know that this is our simplified form. 

This means:

19/50 is the fraction equivalent to 38%. 
5 0
3 years ago
Read 2 more answers
Why might you want to round to the nearest hundred rather than the nearest ten
Luba_88 [7]
To obtain a more accurate answer! :)
8 0
3 years ago
Read 2 more answers
Can someone please clearly explain how to correctly work out Q6? Much appreciated
steposvetlana [31]

s =1/2(u+v)t

u = 16, v=16, t=90

s = 1/2(16+16)90

s = 1/2(36)90

s = 16*90

s = 1440

4 0
3 years ago
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