Answer:
e = -2
Step-by-step explanation:
9e - 7 = 7e - 11
9e - 7e = - 11 + 7
2e = -4
e = -2
A:amount of money invested in the account with 3% simple interest
B: amount of money invested in the account with 4.5% simple interest
a+b=25000 ——>a=25000-b
0.03a+0.045b=900
30a+45b=900000
2a+3b=60000
2(25000-b)+3b=60000
50000-2b+3b=60000
B=10000
A=25000-10000=15000
Answer:
1302 males & 3038 females
Step-by-step explanation:
3x + 7x = 4340
10x = 4340
x = 434
3(434) = 1302 males
7(434) = 3038 females
Answer:
Solution given:
ratio of boys to the girls=5:3
let ratio be 5x and 3x
we have
5x+3x=40
8x=40
x=40/8
x=5
5x=5*5=25
3x=3*5=15
No of boys=25
No of girls=15
