Answer:
Student is incorrect
Step-by-step explanation:
x^2-7x+10=0
x^2+2x-5x+10=0
x(x-2)-5(x-2)=0
(x-5)(x-2)=0
x-5=0 , x-2=0
x=5 , x=2
So the correct solutions of given equation is 2 and 5
Hey there!
Answer-
See Below.
Step by step explanation-
Let the number of 50 paise coins be x, then the number of 25 paise coins will be 4x.
The value of 50 paise coins is 50x paise and the value of 25 paise coins be 25(4x)=100x paise.
According to the giving condition,
∴The number of 50 paise coins is 40 and number of 25 paise coins is 4x=4(40)=160.
The problem is 3+6x = 15 with x being the number of white numbers.
Isolate variable by subtracting 3 on both sides: 6x = 12.
Isolate variable by dividing 6 on both sides: x = 2
The number of white marbles is 2.
This might be too late, but the answer is AAS, but this might still help someone else.