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Sliva [168]
3 years ago
9

Two numbers are in a ratio of 5:4. Their sum is 720. Find the bigger number.

Mathematics
1 answer:
alexgriva [62]3 years ago
8 0
So the numbers are x and y
x:y=5:4
x/y=5/4
this means that x is worth 5 units and y is worth 4 units so
x:y=5:4, therefore it can be represented by
x:y=5z:4z
we know that they add to 720
720=5z+4z
add like terms
720=9z
divide by 9
80=z
multiply by 4
320

80=z
mutipply by 5
400

the numbers are 400 and 320
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jolli1 [7]

Answer:

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Step-by-step explanation:

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3 years ago
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6 0
3 years ago
Which is the completely factored form of the following equation?<br><br> 4a4b2−21a2b+5=0
r-ruslan [8.4K]

The completely factored equation is (a²b - 5)(4a²b - 1)

<h3>How to factor equation?</h3>

4a⁴b² - 21a²b + 5 = 0

let's expand the equation

Therefore,

4a⁴b² - 21a²b + 5 = 0

4a⁴b² - 20a²b  - a²b + 5 = 0

Rearrange the equation

4a⁴b² - a²b  - 20a²b + 5 = 0

Let's factorise the equation

4a⁴b² - a²b  - 20a²b + 5 = 0

a²b(4a²b - 1) - 5(4a²b - 1) = 0

Therefore, the completely factored equation is as follows:

a²b(4a²b - 1) - 5(4a²b - 1) = 0

(a²b - 5)(4a²b - 1)

learn more on equation here: brainly.com/question/8842252

#SPJ1

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2 years ago
I need help please.........
kogti [31]
This is what I got I hope it can help you

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3 years ago
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