choose all equations that are true. a 63 × 10^3 = 63,000 b 63 × 10,000 = 630,000 c 63 × 10^2 = 630 d 63 × 1,000 = 6,300 e 63 × 10^5 = 6,300,000

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

[2, 2.5)

(2.5, 3]

step-by-step explanation:

i think its these two not sure [2, 2.5)

(2.5, 3]

i am not sure :

step-by-step explanation:

2x + 8

step-by-step explanation: