Question

math help
15/24 = 25/x What is x? *

Answer 1

@AZ

Answer 2

cross multiply

so for example

a/b = c/d

would become

ad = bc

Answer 3

15/24 = 25/x

15 * x = 24 * 25

can you solve for x now?

Answer 4

15*x=600

Answer 5

then divide both sides by 15 and get x=40

Answer 6

@AZ am I right

Answer 7

@jhonyy9

Answer 8

\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
@AZ am I right
\(\color{#0cbb34}{\text{End of Quote}}\)

That's correct! Good job

Answer 9

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
\(\color{#0cbb34}{\text{Originally Posted by}}\) @lilcutie2
@AZ am I right
\(\color{#0cbb34}{\text{End of Quote}}\)

That's correct! Good job
\(\color{#0cbb34}{\text{End of Quote}}\)
how do we know if something is a proportion

Answer 10

when you have two ratios or fractions equal to each other

Answer 11

so if I say

to make 1 cake, I need 3 eggs

to make 3 cakes, how many eggs??

so the first fraction is 1 / 3
the second one is 3 / x

so we can set them equal to make a proportion

1/3 = 3/x

and we solve for x

Answer 12

Is 28/46 = 42/69 a proportion? *

yes
No
I think no but I'm not sure

Answer 13

oh like that

Answer 14

so to make sure, you cross multiply just like we did earlier

Answer 15

\(\dfrac{a}{b} = \dfrac{c}{d}\)

\( ad = bc\)

Answer 16

so 28*42 and 46*69

Answer 17

no no

the numerator of the first fraction and the denominator of the other fraction

Answer 18

and if the two numbers are equal, then it's a proportion

Answer 19

s0 28*69 and 42*46

Answer 20

they are a proportion

Answer 21

Yup!