All categories

1 year ago

Which ratios form a proportion

Mathematics

1 answer:

Lelu [443]1 year ago

3 0

Answer:

Step-by-step explanation:

To form a proportion, you need two equal ratios.

Divide the numerator by the denominator of all fractions.

Any two fractions that are equal are a proportion.

4/9 = 0.4444...

9/4 = 2.25

Fractions are not equal. Not a proportion.

4/10 = 0.4

10/25 = 0.4

Fractions are equal. Proportion

4/11 = 0.363636...

6/13 = 0.46153846...

Fractions are not equal. Not a proportion.

I can't read the fractions, but do the same I did above.

Divide each numerator by the denominator and compare the decimals. If they are equal its a proportion. If theya re not equal, it is not a proportion.

You might be interested in

Convert the polar coordinates (-3, -60°) to Cartesian coordinates.

notsponge [240]

Answer:

(1.5,-2.6)

Step-by-step explanation:

Given the polar coordinates (-3,60°).

Let our Cartesian coordinates be (x,y)

#We know that when converting the rectangular coordinates (x,y) to polar (r,θ), then:

$r=\sqrt{x^2+y^2}\\\\\therefore r^2=x^2+y^2\\\\\theta=tan^{-1}(y/x)\\\therefore tan \theta=y/x$

#Using the illustration above, we can express our polar coordinates as:

$-3=\sqrt{x^2+y^2}\\\\-60\textdegree=tan^{-1}(y/x}$

#Solve simultaneously to solve for x and y:

$(-3)^2=x^2+y^2\ \ \ \ \ \ \ \ \ \ i\\\\tan(-0\texdegree)=y/x\ \ \ \ \ \ \ \ ...ii\\\\y=x\ tan(-60\textdegree)\ \ \ \ \ \ \ ...iii\\\\\#substitute\ y \ in\ i\\\\(-3)^2=x^2+(x \ tan (-60\textdegree))^2\\\\9=x^2+3x^2\\\\x=\sqrt{9/4}=1.5\\\\y=1.5\ tan(-60\textdegree)=-2.5981\approx-2.6$

Hence, the Cartesian coordinates are (1.5,-2.6)

6 0

2 years ago

A triangle has side lengths of ,m,3m,and 3m+3. what is the perimeter of the triangle

Galina-37 [17]

Answer:

7m +3

Step-by-step explanation:

To find the perimeter of a triangle, we add up all the sides

m + 3m + 3m+3

Combine like terms

7m +3

5 0

3 years ago

On Wednesday, Danielle skated 2/3 of the way around the track in 2 minutes. Her younger brother skated 3/4 of Danielle's distanc

katen-ka-za [31]

75 percent of 2/3

Is 0.5 of the way

4 0

2 years ago

Pls help i will reward crown to the first person who is right!!!!

EleoNora [17]

Answer:

x=84

Step-by-step explanation:

thi is the answer of the questions

6 0

2 years ago

Solve the system of equations by substitution. 3/8x + 1/3y = 17/24

VashaNatasha [74]

Answer:

this question is not complete. need another equation

Step-by-step explanation:

give another equation then I can solve

$\frac{3}{8} x = \frac{17}{24} - \frac{1}{3} y \\ x = \frac{17}{9} - \frac{8}{9} y$

7 0

2 years ago