What is the solution of this equation -1/2n^2+18=0

(-6,0),(6,0) aka n=-6,6

Step-by-step explanation:

plugged it into desmos and got (-6,0),(6,0)

aka n=-6,6 but we need to find the right one so we plug each one in.

-1/2(-6)^2+18=0                          PEMDAS

-1/2(36)+18=0

-18+18=0

0=0                                            True

-1/2(6)^2+18=0

-1/2(36)+18=0

-18+18=0

0=0                                            True

they both work man idk what to tell ya. if it cant be both i would try 6 first.

btw desmos is a really awesome graphing calculator online. its great to be able to visualize equations.

2500

step-by-step explanation:

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.