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3 years ago

I need dis answer to st

Mathematics

1 answer:

mojhsa [17]3 years ago

7 0

Answer:

The given system of equations has infinitely many solutions.

Step-by-step explanation:

Given equations are:

4x-2y = 28

2x-y = 14

From equation 2:

$2x-14 = y$

Putting in equation 1:

$4x-2(2x-14) = 28\\4x-4x+28 = 28\\28 = 28$

When this happens in the solution of a system i.e. same constant on both sides of equation, the system of equations has infinitely many solutions.

Hence,

The given system of equations has infinitely many solutions.

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This is converting to polar form, I need help and the answer too.

Mila [183]

Answer:

2 cis (7/6 pi)

Step-by-step explanation:

r = sqrt( a^2 + b^2)

r = sqrt (-sqrt(3) )^2 + (-1)^2)

= sqrt(3 +1)

= sqrt(4)

= 2

theta = arctan (b/a)

theta = arctan (-1/-sqrt(3))

theta = 30

but this is in the third quardrant -a and -b

so add 180

theta = 210 degrees

convert this to radians

210 * pi/180 = 210/180 * pi = 21/18 * pi = 7/6 * pi

r cis (theta)

2 cis (7/6 pi)

7 0

2 years ago

How to solve y in -(y+9)=10

Allisa [31]

Answer:

Step-by-step explanation:

- (y+9) = 10

Multiply through by -1 gives us

y+9 = -10

Subtract 9 from both sides

y = -19

That's your answer.

If you work it through it satisfies the equation.

That is:

- (-19 +9) = 10

-(-10) = 10

10 = 10

Boo ya!

5 0

3 years ago

Change the fraction to a decimal: 5/6 = _____

amm1812

Answer:

0.833

Step-by-step explanation:

4 0

2 years ago

two business partners, Ellen and Bob, invested money in their business at a ratio of 3 to 7. Bob invested the greater amount. th

Shtirlitz [24]

Answer:

Ellen invested $60 and Bob invested $140

Step-by-step explanation:

let the two amounts invested by 3x and 7x

(notice 3x : 7x = 3 : 7 )

then 3x + 7x = 200

10x = 200

x = 20

then 3x = 3(20) = 60

and 7x = 7(20) = 140

60+140=200

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3 years ago

Using the Laws of exponents, simplify the following problem.

den301095 [7]

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(4^4)/(4^-22)
4^(4-(-22))
4^26

Follow my Account.

7 0

3 years ago