Triangles abc and def are similar. what is the length of side ef

The length of the side EF is 3cm.

Step-by-step explanation:

As both triangles are similar, their corresponding sides are in proportion.

This means that:

This proportion is called the scale factor.

Knowing this, we can find the value of x

So, the lenght of side EF is 3cm.

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!