Home > Algebra > Equations with Ratios and Proportions

How do you use cross products to solve #a/4=3.5/2#?

Answer 1

Avery Alexander

#a=7#

#a/4=3.5/2#

#a={4\times3.5}/2#

#a={14}/2#

#a=7#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Eva Adamson

To solve ( \frac{a}{4} = \frac{3.5}{2} ) using cross products, you would first multiply both sides of the equation by 4 to isolate ( a ). Then, you would multiply both sides by 2 to solve for ( a ). The steps are as follows:

( \frac{a}{4} = \frac{3.5}{2} )

Multiply both sides by 4:

( 4 \times \frac{a}{4} = 4 \times \frac{3.5}{2} )

( a = 4 \times \frac{3.5}{2} )

( a = 2 \times 3.5 )

( a = 7 )

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.