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2 years ago

PLS HELP ASAP x^2 - 4x-1=0 Solve using formula

Mathematics

2 answers:

Karo-lina-s [1.5K]2 years ago

8 0

2x ( x - 2x) = 1

2x= 1

x = 0.5

x-2x = 1

-x = 1

x = -1

-BARSIC- [3]2 years ago

4 0

X1=2-Square root 5 x2=2+ Square root 5

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At East Middle School, there are 585858 left-handed students and 609609609 right-handed students. The numbers of left- and right

lisabon 2012 [21]

Answer: C. Left-handed: 48 Right-handed: 504

E. Left-handed: 30 Right-handed: 315

Step-by-step explanation:

Here is the completed question:

At East Middle School, there are 58 left-handed students and 609 right-handed students. The numbers of left- and right-handed students at West Junior High are proportional to the numbers at East Middle School. Which of the following could be the numbers of left-handed and right-handed students at West Junior High?

A. Left-handed: 42 Right-handed: 483

B. Left-handed: 28 Right-handed: 378

C. Left-handed: 48 Right-handed: 504

D. Left-handed: 56 Right-handed: 560

E. Left-handed: 30 Right-handed: 315

Since it's direct proportion, we have to calculate the constant of proportionality which will simply be:

= 609 / 58 = 10.5

A. Left-handed: 42 Right-handed: 483

Constant = 483/42 = 11.5

Incorrect

B. Left-handed: 28 Right-handed: 378

Constant = 378/28 = 13.5

Incorrect

C. Left-handed: 48 Right-handed: 504

Constant = 504/48 = 10.5

Correct

D. Left-handed: 56 Right-handed: 560

Constant = 560/56 = 10

Incorrect

E. Left-handed: 30 Right-handed: 315

Constant = 315/30 = 10.5

Correct

Therefore, the correct options are C and E.

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2 years ago

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Answer:

64 squnits

Step-by-step explanation:

trapezium is (base+top)/2 times height

(6+10)/2=8

8x8=64

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IMPORTANT PLZ HELP!!!!

kolbaska11 [484]

Answer:

Step-by-step explanation:

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Ivanshal [37]

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3 years ago

How to solve -x+4=-2x-6

Feliz [49]

Regroup terms

Add 2x to both sides

Simplify 4 - x + 2x to 4 + x

subtract 4 from both sides

subtract -6 - 4.

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