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dangina [55]
3 years ago
7

Is the ratio 4.2:1.5 proportional to the ratio12.6:4.5? Explain.

Mathematics
2 answers:
fenix001 [56]3 years ago
7 0

Answer:

Yes, the ratio is proportional

Step-by-step explanation:

given 4.2 : 1.5 =? 12.6 : 4.5 is it proportional

it must follow the means extremes property

\frac{a}{b} = \frac{c}{d}

a*d = b*c, so let's plug in the values

\frac{4.2}{1.5} =? \frac{12.4}{4.5}

(4.2)*(4.5) =? (1.5)*(12.6)

18.9 = 18.9 which is true; therefore the ratio is proportional

mote1985 [20]3 years ago
6 0

Answer:

No

Step-by-step explanation:

All the numbers have to be multiplied by the same amount for it to be proportional

A proportional amount to 4:2:1:5 would be 12:6:3:15

They have all been multiplied by the same number 3

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3^x ( x^2 -3) i don't know how to solve this problem
geniusboy [140]
3ˣ (x² - 3)

Basically, just multiply everything together.

Step 1 : 3x × x² = 3x³ because when multiplying exponents, all you're really doing is adding them on top. So, x + 2x = 3x! But, they are exponents, so you get 3x³.

Step 2 : 3x ˣ × (-3) = -9ˣ

Now, our new question is : 3x³ - 9x

You wouldn't simplify this because x³ is NOT the same as x.

~Hope I helped!~
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2 years ago
a sporting good store received an order of 90 baseball caps, of which 18 were green. if 1 of the 90 caps is selected at random,
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3 years ago
Elisa had some candy to give to her four children. She first took ten pieces for herself and then evenly divided the rest among
zimovet [89]
She had 18 to start with because when you multiply 4 by 2 it’s 8, so then you add 8 to 10 which is 18.
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3 years ago
A circle has a diameter of 10 cm. What is the best approximation of its area? Use 3.14 for pi.....you need radius not diameter i
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Answer:

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Step-by-step explanation:

8 0
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I need to know the answer to this question above.
marusya05 [52]

Answer:

The coordinates of the end point B are (14 , 8)

Step-by-step explanation:

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3 years ago
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