Question

(1)In 2x/3
= 18 ,the value of x is.

(A) 10. (B). 20. (C). 27 (D). 7
(2)The area of a rectangular whose length and bread are 3x ,5y respectively.

(A) 8xy. (B). 2xy(C)15xy(D) xy
(3)The value of 3x+4when x = 2 is .

(A) 10. (B). 20. (C). 15. (D). 25
(4)3^-4×3^-5=​

Answer 1

Answer:

1)c.27

2)a.9xy

3)a.10

4)no options.

Answer 2

Answer:

27, 15xy, 10

Step-by-step explanation:

(i) 2x/3 = 18 than x=?

$\frac{2x}{3} = 18 \\ 2x = 18 \times 3 \\ 2x = 54 \\ x = \frac{54}{2} = 27 \\ option \: no \: c$

$(ii) \: area \: of \: rectangle \: whose \: length \: and \: bredth \: \\ 3x \: \: 5y \\ 3x \times 5y = 15xy \: \: \: option \: no \: c$

$3x + 4 find \: the \: value \: if \: x = 2 \\ 3 \times 2 + 4 \\ 6 + 4 = 10 \: option \: no \: 1$