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Ne4ueva [31]
3 years ago
5

Select Proportional or Not Proportional to correctly classify each pair of ratios. Proportional Not Proportional 12/30 and 18/45

Mathematics
2 answers:
Zinaida [17]3 years ago
4 0
12/30 = 18/45....cross multiply
(30)(18) = (12)(45)
540 = 540...proportional

another way to tell is to see if they are equivalent...because proportions are nothing but equivalent fractions.
12/30 = 2/5
18/45 = 2/5
so yes, they are proportional
Ksenya-84 [330]3 years ago
3 0

12/30 = 18/45, so first you're going to cross multiply and you'll get (30)(18) = (12)(45). Then you can see that 540 = 540 same number so they're proportional...

BTW THIS WAY IS A LOT EASIER.

12/30 = 2/5

18/45 = 2/5

So yes, in summary, they're proportional to each other. Hope this helps, have a BLESSED and wonderful day! :-)

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Passes through (3, 4) and (5, -4) how do I solve​
nikitadnepr [17]

Answer:

y = - 4x + 16

Step-by-step explanation:

Assuming you require the equation of the line passing through the points.

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (3, 4) and (x₂, y₂ ) = (5, - 4)

m = \frac{-4-4}{5-3} = \frac{-8}{2} = - 4, thus

y = - 4x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (3, 4), then

4 = - 12 + c ⇒ c = 4 + 12 = 16

y = - 4x + 16 ← equation of line

8 0
3 years ago
Order the rate of change from least to greatest ILL MARK BRANLIEST ANSWER
viktelen [127]

Answer:

numbers??????????

Step-by-step explanation:


4 0
3 years ago
PLEASE ANSWER OFFERING BRAINLEST
Inessa [10]
B-9inches hope that helps
3 0
2 years ago
35 points!! Only comment if you really know the answer please.
hodyreva [135]
Y = 3x - 1 ---- (1)
x - y = -9  ---- (2)

From Equation 2:
x - y = - 9
x + 9 = y 
y = x + 9 --- (2a)

(1) - (2a):
0 = 3x - x - 1 - 9
0 = 2x - 10
2x - 10 = 0
2x = 10
x = 5 ---- sub into (1)

y = 3(5) - 1 
y = 15 - 1
y = 14 

5 0
3 years ago
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Marina86 [1]
54 square inches
Basically you just multiply
6 0
3 years ago
Read 2 more answers
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