Mary has some trading cards. julie has 3 times as many trading cards as mary. they have 36 trading cards in all. which of these equations represents their trading card collection? a) 3x=36 b)x+3=36. c)x+3x=36 d)3x+36=x

C. X+3x=36

Step-by-step explanation:

1. If you add the x's to get: 4x=36

2. Do division to get 9.

3. if you plug in 9 in the original,and multiply: 9+27=36

4. There's your answer and i ran out of steps.

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.

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.