There are 300 boys and girls in hope primary school in the last school year. In this school year, boys increase by 4% and girls increase by 5%, with a total increase of 13 It is hoped that there will be 300 boys and girls in the last school year. In this school year, there will be an increase of 4% for boys and 5% for girls, with a total increase of 13. How many boys and girls are there in this school year?

There are 300 boys and girls in hope primary school in the last school year. In this school year, boys increase by 4% and girls increase by 5%, with a total increase of 13 It is hoped that there will be 300 boys and girls in the last school year. In this school year, there will be an increase of 4% for boys and 5% for girls, with a total increase of 13. How many boys and girls are there in this school year?

In the last academic year, there were x girls and 300-x boys
4%x+(300-x)5%=13
x=100
There were 100 girls and 200 boys last school year
In this academic year, girls are 100 * 5% = 5, boys are 200 * 4% = 8,
There are 208 boys and 105 girls in this academic year

30 △ x + 25 = 85, how to use the equation solution-*

30/X=85-25
30/X=60
X=1/2

Girls account for two fifths of the class. How many percent more boys than girls?

1-two fifths = three fifths
Three fifths - two fifths divided by two fifths
It's 50 percent

1/2√28?
(A)√15
(B)√53
(C)√75
(D)√225
Is that right?
√300?
(A)50√6
(B)12√5
(C)3√10
(D)10√3
Hope GG mm will answer quickly!

√28=√4*7=√4*√7=2√7
1/2√28=1/2*2√7=√7
√300=√100*3=√100*√3=10√3

How much is 1 + 2 + 3. + 99

1+2+3.+99=[(1+99)/2]*99=50*99=50*(100-1)=5000-50=4950

The fourth grade mathematics of primary school moves the decimal point of a number one place to the right, which is 576 more than the original one. What's the number

576÷(10-1)
=576÷9
=64
A: the number is 64

The number of a is 2 / 3 of the number of B, and the number of B is 4 / 5 of the number of C. find the ratio of a, B and C

The number a is two-thirds of the number B
A: B = 3:2 = 15:10
B is four fifths of C
B: C = 5:4 = 10:8
The ratio of a, B and C
A: B: C = 15:10:8

The solution set of the equation sin ^ 2x minus 2sinx = 0 is? Detailed solution

sinx（sinx-2）=0
sinx=0
X = 2K π, K is a natural number

4 / 5 of a number is 2 / 3 of 120. Find the number

4/5 * X=2/3 * 120 ---> X=100

3x-y-z = 9 ① 2x + y-2z = 6 ② x + y + Z = 15 ③ important process

3x-y-z=9①2x+y-2z=6②x+y+z=15③
(1) (2) get: 5x-3z = 15 (4)
(2) (3) x-3z = - 9 (5)
(4) (5) get: 5x-x = 15 + 9;
4x=24；
x=6;
If (5) is brought in, z = 5;
In (1), y = 4;
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