There seems to be 351 students
270*.30=81
81+270=351
Answer:
Sweety's age = 16 years and Sweety’s mother’s age = 44 years
Step-by-step explanation:
Let Sweety's age is x.
Sweety’s mother age = 12+2x
After 8 years,
Sweety's age = x+8
Sweety’s mother age = 12+2x+8
Since Mother's age will be 20 years less than three times my age.
2x+20 = 3(x+8)-20
2x+20=3x+24-20
2x+20=3x+4
Taking like terms together,
20-4=3x-2x
x = 16
Sweety's age = 16 years
Sweety’s mother’s age = 12+2x
= 12+2(16)
= 12 + 32
= 44 years
Hence, Sweety’s age and Sweety’s mother’s age is 16 years and 44 years respectively.
Answer:
x2 - 4x - 21
Step-by-step explanation:
Yes it is because 18÷6 is 3 and 6×3=18
The x value of the vertex in
ax^2+bx+c is -b/2a
y value is just sub for x
3x^2-6x+5
x value of vertex is -(-6)/(2*3)=6/6=1
sub back
y=3(1)^2-6(1)+5
y=3(1)-6+5
y=3-1
y=2
vertex is (1,2)
