Is the ratio 4.2:1.5 proportional to the ratio 12.6:4.5? Explain.PLEASE HELP I SUCK AT MATH!!!!

Answers

Answer 1

Answer:
Yes, the two ratios are proportional to each other. The multiplier from the first ratio to the second ratio is 3. For example, 4.2 x 3 = 12.6 and 1.5 x 3 = 4.5. Basically, to figure out if two ratios are proportional to each other, just divide the smaller number into the bigger number for both corresponding numbers. If they're the same ---> Proportional. If they're not the same ---> Not Proportional

Answer 2

Answer: yes it is proportional because the ratios are related in the physics.

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Which is the equation of a parabola with vertex (0,0), that opens to the right and has a focal width of 8?

Answers

Answer:

Equation of parabola:

$y^2=8x$

Step-by-step explanation:

A parabola with vertex (0,0), that opens to the right.

The general equation of parabola open right whose vertex (0,0)

$y^2=4px$

Focal width : Two points opposite to the the focus on parabola.

Distance between these two points is called focal width i,e 4p

Focal width = 8

So, 4p=8

p=2

Focus: (2,0)

Equation of parabola:

$y^2=8x$

Answer:

Vertex: V=(0,0)=(h,k)→h=0, k=0

Opens downward:

(x-h)^2=4p(y-k)

Width focal: p=-6<0 (donwnward)

Replacing h=0, k=0 and p=-6 in the equation above:

(x-0)^2=4(-6)(y-0)

x^2=-24y

Answer: The equation of the parabola is x^2=-24y

Step-by-step explanation:

I need to answer these for test corrections and it is due tomorrow can anyone help?

Answers

I am not sure about 18 and 19 but here is 17:#17: Periander was the second tyrant of Corinth and the son of Cypselus, the founder of the Cypselid dynasty. Cypselus' wife was named Cratea.

The prime number 19 is the average of which two different prime numbers?

Answers

Hi There!

The answer would be 19 divided by 1, because 19 is a prime number so it has the factors of 19 and 1, so 19 divided by 1 is 1.

Hope This Helps!

It's just 19 ÷ 1 because if you only did 19 ÷ 19 it would just equal 1. Any number divided by itself will always equal 1. Hope this makes sense a little bit

How do you write 30,000 as a whole number