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3 years ago

Select the three expressions that are equivalent to 4/9

Mathematics

1 answer:

Deffense [45]3 years ago

6 0

Answer:

8/18 or 12/27 or 16/36

Step-by-step explanation:

just add 4 on top and 9 on bottom and u should get all

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- 2a = - 20<br> What is the most simplest answer?

Evgesh-ka [11]

- 2a = - 20 | x (-)

2a = 20

a = 20 : 2

a = 10

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3 years ago

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If 1 kg = 2.2 pounds, convert 77 kg into pounds

weqwewe [10]

Answer:

169.4 lbs

Step-by-step explanation:

77 * 2.2 = 169.4

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3 years ago

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Car leases generally allow only a certain number of miles to be driven. Myung’s lease included a charge of 25 cents per mile for

KengaRu [80]

Answer:

197

Step-by-step explanation:

Divide 1640 by 25

1640/25=65

Then multiply 65 and 3

65x3=197

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3 years ago

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Please help me!!! will mark brainliest if you do

Vesnalui [34]

9514 1404 393

Answer:

17. 5

18. 17

Step-by-step explanation:

The distance formula is used for the purpose.

d = √((x2 -x1)² +(y2 -y1)²)

17. d = √((3-6)² +(1-5)²) = √((-3)² +(-4)²) = √(9+16) = √25 = 5

The distance between the points is 5 units.

18. d = √((-1-7)² +(12-(-3))²) = √(64 +225) = √289 = 17

The distance between the points is 17 units.

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3 years ago

What is the solution set of x2 + 5x + 1 = 0?

DerKrebs [107]

Answer:

$\huge\boxed{\left\{-\dfrac{5+\sqrt{21}}{2};\ \dfrac{-5+\sqrt{21}}{2}\right\}}$

Step-by-step explanation:

$x^2+5x+1=0\\\\\text{Use the quadratic formula:}\\\\\text{For}\ ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\\text{if}\ \Delta < 0,\ \text{then the equation has no real solution}\\\text{if}\ \Delta=0,\ \text{then the equation has one real solution}\ x=\dfrac{-b}{2a}\\\text{if}\ \Delta>0,\ \text{then the equation has two real solution}\ x=\dfrac{-b\pm\sqrt{\Delta}}{2a}$

$\text{We have}\\\\a=1,\ b=5,\ c=1\\\\\Delta=5^2-4(1)(1)=25-4=21>0\\\\x=\dfrac{-5\pm\sqrt{21}}{2(1)}=\dfrac{-5\pm\sqrt{21}}{2}$

3 0

3 years ago