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are 30/12 and 40/16 equivilent?

if a/b=c/d then a/b times d/c=1
basically if ad=bc then they are equivilent

30/12 ad 40/16 equvilient?
30/12 times 16/40=1?
480/480=1?
1=1?
yes
they are equivilent

6 0

2 years ago

Katrina is going to order sweatshirts for her girls mentoring group. The sweatshirts will have the group logo printed on the fro

Kaylis [27]

Answer:

Step-by-step explanation:

Because 21.50 x 20 =430

and 18 x 20 = 360

then you add 70 to 360 and you get 430

so Katrina would have to order 20 shirts from each company in order for the cost to be the same.

5 0

2 years ago

5x^2-25x=125 solve by completeing the square

IRINA_888 [86]

Answer:

x = 10, -15

Step-by-step explanation:

We can start right away by dividing both sides of our equation by 5 to get the reduced form $x^2-5x=25$ .

To "complete the square," or turn the left side of the equation into something we can factor into a perfect square, it helps to remember that for any binomial x - a:

$(x-a)^2=x^2-2ax+a^2$