4 गेंद या कलमो का मूल्य ₹ 12 हो तो 6 गेंद और 6 कलमो का मूल्य बताइए​

Is the open sentence 5x-2=3x+2 true when x=2? justify your answer.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.