Solve 25x^2-30=0
round the answer to the nearest hundredth
x=-1.10 and x=1.10
x=-26.15 and x=1.15
x=0
x=-0.83 and x=0.83

x = - 1.10 and x = 1.10

Step-by-step explanation:

Given

25x² - 30 = 0 ( add 30 to both sides )

25x² = 30 ( divide both sides by 25 )

x² = ( take the square root of both sides )

x = ±

x = - 1.10 and x = 1.10 ( to the nearest hundredth )

A.

Step-by-step explanation:

I took the test

10 trains

Step-by-step explanation:

The proportion of full trains to trains is 6 to 9, 6/9

We can set 6/9 equal to x/15, because we want to know how many full trains there would be

6/9=x/15

Cross multiply

9x=90

Divide by 9 on both sides,

x=10

So of the next 15 trains, 10 should be full

Hope this helps!