Need now
which of the following expressions is not in its simplest form?
m + 3 n + 6 mn - 4
9 m + 7 n - 6 mn + 4
7 m - 9 n - 6 mn + 4
9 m + 7 n - 6 mn + 4 m

9 m + 7 n - 6 mn + 4 m

Step-by-step explanation:

m + 3 n + 6 mn - 4 for this expression , it is already in its simplified form as we can not add any term together because they are not have the same variables.

9 m + 7 n - 6 mn + 4 this also is already simplified

7 m - 9 n - 6 mn + 4 the same thing with this

9 m + 7 n - 6 mn + 4 m this particular can still be further simplified because we have 9m and 4m having the same variable and we can therefore add them together , the simplified form of the expression will be

13m + 7n - 6mn

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

y + 11 = (1/4)(x + 16)

step-by-step explanation: