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SIZIF [17.4K]
3 years ago
15

Who could help me with this please and thank you

Mathematics
1 answer:
kkurt [141]3 years ago
4 0

Answer:

Step-by-step explanation:

let the number be x

so according to the question ur equation is

4x=5<x^2

4x-5=x^2

4-5=x^2/x

-1=x

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48 students are girls they make up 60% of the class how many students total
qwelly [4]
For this you would do
48 \div .60
Because 60% is the same as 0.60. And solving a problem like this is the opposite of finding a percent of a number. When you solve this you get 80. So there are 80 students in total.
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3 years ago
Ten times the square of a non-zero number is equal to fifty times the number. what is the number?
lys-0071 [83]
10x^2 = 50x.....subtract 50x from both sides
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10x(x - 5) = 0

10x = 0
x = 0 <== this one is eliminated because x cannot be zero

x - 5 = 0
x = 5 <== ur answer
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3 years ago
Figure this out please Asap.
weeeeeb [17]

If the polygons are similar then the sides are in proportion.

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Therefore we have the equations:

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\dfrac{y+1}{21}=\dfrac{4}{3}\qquad\text{cross multiply}\\\\3(y+1)=(21)(4)\\\\3y+3=84\qquad\text{subtract 3 from both sides}\\\\3y=81\qquad\text{divide both sides by 3}\\\\\boxed{y=27}

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3 years ago
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