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Maslowich
3 years ago
7

at a festival, 2/7 of the number of girls was equal to 3/5 of the number of boys. There were 165 fewer boys then girls, how many

children were at the festival in all?
Mathematics
1 answer:
Hoochie [10]3 years ago
7 0

We know this: 2/7 G = 3/5 B

We know this: B = (G - 165)

Plug the second equation into the first to solve for G:  2/7 G = 3/5(G - 165)

Solve from there.

G = 315

Plug that into the second equation: B = (G - 165)

B = 315 - 165

B = 150

G + B = 465

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Find the solution to the system of equations. 4x + 3y = –1 3x – 9y = 33
alexandr1967 [171]

Answer:

Step-by-step explanation:

4x + 3y = -1         --------------(i)

3x - 9y = 33        -------------(ii)

multiply equation (i) by 3

(i)* 3     12x + 9y = -3

(ii)       <u>   3x - 9y = 33</u>

add,       15x = 30

                 x = 30/15

                 x = 2

Put x =2 in Equation (i)

4*2 + 3y = -1

8 +3y = -1

     3y = -1-8

     3y = -9

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5 0
3 years ago
A ball is rolling in a circular path that has a radius of 10 inches as shown in
elena55 [62]
The complete question in the attached figure

we know that
[circumference]=2*pi*r
for r=10 in
[circumference]=2*pi*10-----> 62.8 in

if 360° (full circle) has a length of --------> 62.8 in

 54°------------------------------> X
x=54*62.8/360-----> x=9.42 in

the answer is 9.42 in

5 0
3 years ago
Approximately 1,870,000 oz of gold went into the manufacturing of electronic equipment in a certain country in 1 year. This was
Alexxandr [17]

Answer: 17000000 ounces of gold were mined in that country that year.

Step-by-step explanation:

Let x represent the number of ounces of gold that were mined in that country that year.

Approximately 1,870,000 oz of gold went into the manufacturing of electronic equipment in a certain country in 1 year. This was 11% of all the gold mined in that country that year. This means that

11/100 × x = 1870000

0.11x = 1870000

x = 1870000/0.11

x = 17000000

7 0
3 years ago
What is 1 2/3 times 4/5 in simplest form
Leviafan [203]

Answer:

Step-by-step explanation:

numerator x numerator

denominator x denominator

2 x 4=8

3 x 5=15

1 8/15

3 0
3 years ago
10 POINTS PLEASE HELP ME!!
castortr0y [4]
Vertical angles is the answer

Supplementary means they add up to 180
Adjacent means they are next to each other
Complementary means they add up to 90
So the answer is vertical
6 0
3 years ago
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