Solve the following system of equations. 4x+5y=10 8x+5y=30

1. x

=

5

2

−

5

y

4

x=5/2-5y/4

2. x

=

15

4

−

5

y

8

x=15/4-5y/8

Step-by-step explanation:

Step-by-step explanation:

Given the system of equations , you can use the Elimination Method to solve it.

Multiply the first equation by -1, add both equations and then solve for the variable "x":

And finally, substitute the value of the variable "x" into any original equation and solve for the variable "y". Then:

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.