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3 years ago

6

The perimeter of a square is directly proportional to the length of one of its sides. The perimeter is 28 when the length of a s

ide is 7.
What is the constant of proportionality?

1 answer:

telo118 [61]3 years ago

4 0

Step-by-step explanation:

check the pic

answer is 4

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RoseWind [281]

Answer:

the point slope is: y-9= -14(x+2)

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Dmitry_Shevchenko [17]

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Step-by-step explanation:

TO find the answer, use multiplication.

When one part of a fraction multiplies, you multiply the other number with it. 22x3 is 66, so divide 60 by 3. You get 20. n=20. Hope it helps.

You can use ratio. 60:66 is n:22. 22 goes into 66 3 times, and 20 goes into 60 3 times too, so 20:22 is equivalent to 60:66

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Use the quadratic formula to si<br> 3x2 + 8x – 4= 0

omeli [17]

Answer:

$\large\boxed{x=\dfrac{-4-2\sqrt7}{3}\ or\ x=\dfrac{-4+2\sqrt7}{3}}$

Step-by-step explanation:

$\text{The quadratic formula for a quadratic equation}\ ax^2+bx+c=0\\\\\text{determinant:}\ \Delta=b^2-4ac\\\\\text{If}\ \Delta0,\ \text{then the equation has two different solutions}\ x=\dfrac{-b\pm\sqrt\Delta}{2a}.$

$\text{We have:}\\\\3x^2+8x-4=0\\\\a=3,\ b=8,\ c=-4\\\\\Delta=8^2-4(3)(-4)=64+48=112>0\\\sqrt\Delta=\sqrt{112}=\sqrt{(16)(7)}=\sqrt{16}\cdot\sqrt7=4\sqrt7\\\\x=\dfrac{-8\pm4\sqrt7}{2(3)}=\dfrac{-8\pm4\sqrt7}{6}=\dfrac{2(-4\pm2\sqrt7)}{6}=\dfrac{-4\pm2\sqrt7}{3}$

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3 years ago

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Goryan [66]

Answer:

Step-by-step explanation:

f(10) = 6(10)^2 - 4(10) + 25 = 6(100) - 40 + 25

600 - 40 + 25 = 520 + 25 = 545

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3 years ago