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pishuonlain [190]

3 years ago

9

7.6 is 40% of what number

2 answers:

Alinara [238K]3 years ago

8 0

The answer is 19 :DDD

marusya05 [52]3 years ago

6 0

Turn things like this into an equation:
0.40x=7.6
Divide 0.40 on both sides
x=19 is the answer

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6x squared plus 12x plus 13 equals 2x squared plus 4

Andrews [41]

$12x^2+12x+3=2x^2+4\\\\12x^2-2x^2+12x+3-4=0\\\\10x^2+12x-1=0\\\\a=10;\ b=12;\ c=-1\\\\\Delta=12^2-4\cdot10\cdot(-1)=144+40=184\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{184}=\sqrt{4\cdot46}=2\sqrt{46}\\\\x_1=\frac{-12-2\sqrt{46}}{2\cdot10}=\frac{-6-\sqrt{46}}{10};\ x_2=\frac{-12+2\sqrt{46}}{2\cdot10}=\frac{-6+\sqrt{46}}{10}$

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3 years ago

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Step-by-step explanation:

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P Is inversely proportional to v<br><br> When p=5, v=8 <br><br> Find a formula for p in terms of v

Tju [1.3M]

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p = $\frac{40}{v}$

Step-by-step explanation:

Since p is inversely proportional to v then the equation relating them is

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to find k use the condition when p = 5, v = 8

k = pv = 5 × 8 = 40, hence

p = $\frac{40}{v}$

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A pattern has five blue triangles to every 80 yellow triangles what is the ratio of blue triangles to all triangles

MrMuchimi

The answer is set up like this: 5:80, it can be simplified to 1: 16. In simplest form there is 1 blue triangle for every 16 yellow triangles.

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