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worty [1.4K]
3 years ago
11

at a country concerts the ratio of the number of boys to the number of girls 2 to 7.if there are 250 more girls than boys how ma

ny boys are at the concerts.
Mathematics
1 answer:
ryzh [129]3 years ago
7 0
Let B be the number of boys and G= number of girls:

B/G = 2/7 (given)

And

G= 250+B (given), then

B/G = B/(250+B) = 2/7

B/(250+B) = 2/7 → Cross multiplication:

7.B = 2(250+B) → 7.B = 500 + 2.B

5.B = 500  And B = 500/5   And B = 100

Boys = 100  and Girls = 350

Proof: 100/350 = 10/35 = 2/7
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Answer:

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Step-by-step explanation:

Okay since that is that you gotta that 23u172, got it?

5 0
3 years ago
6b^3 (2a+7b), how to solve it?
slamgirl [31]
<span>6b^3 (2a+7b)

</span>
<span><span>(<span>6b^3</span>)</span><span>(<span>2a+7b</span><span>)

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<span><span><span>=(<span>6b^3</span>)</span><span>(2a)</span></span>+<span><span>(<span>6b^3</span>)</span><span>(7b)

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<span><span>=12ab^3</span>+<span>42<span>b^4]



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<span><span><span>12a</span><span>b^3</span></span>+<span>42<span>b^4</span></span></span>    
6 0
3 years ago
For each expression, write an equivalent expression that uses only addition.
konstantin123 [22]

Equivalent expressions are expressions of equal values

The equivalent expressions are 4x+ (y - 8y) + (2z-5z) +6   and 6x-3x-6x + (2y - 10y) + (4 - 8) + (z - 88z)

<h3>How to determine the equivalent expressions</h3>

The first expression has been solved.

So, we have the following expressions

4x−7y−5z+6 and -3x−8y−4−87z

<u>4x−7y−5z+6</u>

We have:

4x-7y-5z+6

Rewrite as:

4x+ (y - 8y) + (2z-5z) +6

<u>-3x−8y−4−87z</u>

We have:

-3x−8y−4−87z

Rewrite as:

3x-6x + (2y - 10y) + (4 - 8) + (z - 88z)

Hence, the equivalent expressions are 4x+ (y - 8y) + (2z-5z) +6   and 6x-3x-6x + (2y - 10y) + (4 - 8) + (z - 88z)

Read more about equivalent expressions at:

brainly.com/question/2972832

7 0
2 years ago
3-(4-2) 5<br> 3.4-2.5<br> 11-4-2<br> 2015<br> 11 (42)<br> (7-3)-(4-2)7-3-4-2
KATRIN_1 [288]

Answer: look below :)

Step-by-step explanation:

5 < 11 < 42 < 2015

5 is less than 11 is less than 42 is less than 2015

5/

1

< 11/

1

< 42/

1

< 2015/

1

8 0
1 year ago
PLEASE HELP! WILL MARK BRAINLIEST
Veseljchak [2.6K]

The value of x is 3, while the length of the rectangle is 30 units and the width is 24 units.

<h3>How to determine the dimensions?</h3>

The given parameters are:

Base = 5(x+3)

Height = 2(x+9)

Perimeter = 108

The perimeter of a rectangle is

P = 2 *(Base + Height)

So, we have:

2 *(5(x + 3) + 2(x + 9)) = 108

Divide both sides by 2

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Open the brackets

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Evaluate the like terms

7x = 21

Divide by 7

x = 3

Substitute x = 3 in Base = 5(x+3) and Height = 2(x+9)

Base = 5(3+3) = 30

Height = 2(3+9) = 24

Hence, the value of x is 3, while the length of the rectangle is 30 units and the width is 24 units.

Read more about perimeter at:

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#SPJ1

5 0
1 year ago
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