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Rashid [163]
3 years ago
9

The number of girls in the Middle School Cyber Club was 6 more than double the number of boys, and in total there were 48 middle

school students in the Cyber Club.
Mathematics
1 answer:
Wittaler [7]3 years ago
5 0

Answer:

g = number of girls;

b= number of boys

we know that: g= 6+2b

     and that: g+b= 156 kids in total

so we may write  g+b=(6+2b)+b=6+3b

                 but g+b= 156

so 6+3b = 156 => 3b= 156-6=150 =>   b=150/3=50 => b = 50 (number of boys)

g= 6+2b= 6+2 x 50= 106 => g =106 (number of girls)  

Step-by-step explanation:

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4. Ideal amount of children
Vaselesa [24]

Answer:

3

Step-by-step explanation:

Formula:

\frac{sum of all numbers added together}{total amount of numbers}

\frac{21}{7} = 3

3 0
3 years ago
Half a number plus 2.5 times that number equals 18. What is the number?
Sholpan [36]

Answer:

It's 6.

Step-by-step explanation:

this was so confusing

4 0
3 years ago
Lara bought 3 yards of fabric and a spool of thread for $28.10. If the spool of thread cost $1.25, how much did the fabric cost
Lyrx [107]

Answer: $8.95 per yard of fabric

Step-by-step explanation:

Define the following:

x = cost of fabric per yard

Make an equation:

⇒ 3x + 1.25 = 28.10

⇒ 3x = 26.85

⇒ x = 8.95

∴ $8.95 per yard of fabric

7 0
2 years ago
The perimeter of a rectangle is 80ft.and the length is 21ft the width of the rectangle is
laila [671]

Answer: 19 ft


Step-by-step explanation: To find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. You now have the total length for the remaining 2 sides. This number divided by 2 is the width. Hope this helps :)


3 0
3 years ago
An urn contain 2 white marbles, 3 green marbles, and 5 red marbles. A marble is drawn and then replaced. Then a second marble is
11111nata11111 [884]

<u>Answer:</u>

1/5

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

To find this you would need to multiply the probability of pulling a white marble to the probability of pulling out a green marble.

1)First you would need the probability of pulling out a white marble. There are 10 marbles in total and out of those 2 are white. So the probability of pulling out a white marble would be 2/10. If you simplify that you would get 1/5 for the probability of pulling out a white marble.

2)Next, you would find the probability of pulling out a green marble. Using the same process that we used to find the probability of pulling out a white marble, we would find the answer to be 3/10. All that we did here was <em>green marbles/total marbles</em>. By filling that in we got 3/10 for the probability of pulling out a green marble.

3)Now all that is left is doing <em>probability of pulling a white marble × probability of pulling out a green marble</em>. This would be 1/5 × 3/10. After solving the answer would be 3/15 which we would simplify down to 1/5 as our final answer.

5 0
3 years ago
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