Please can someone solve x and I need it as an improper fraction please ​

7x=21/5

X=3/5

hope it helps

x=26/7

Step-by-step explanation:

Add 5/7 to both sides. Multiply 3 and the denominator being 7 to get 21. Add the numerator of 5 to 21 to get 26. The denominator stays the same and the numerator becomes 26.

the answer will be

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.