3 years ago

-9y + 4x - 20 = 0 -7y + 16 - 80

Mathematics

2 answers:

ioda3 years ago

8 0

Answer:

Step-by-step explanation:

Gnesinka [82]3 years ago

4 0

Answer: y = 2 x + 22

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Jasmine cell phone company charges her $35 a month for phone service plus $.50 for each text message how many text messages does

aksik [14]

She would be able to send 34 messages

7 0

3 years ago

What is the result of adding these two equations? 6 x + 2 y = − 2 3 x − 2 y = − 5 6x+2y 3x−2y =−2 =−5

stellarik [79]

Answer:

The result gives the equation: 9x = -7

solution: (-7/9, 4/3)

Step-by-step explanation:

6 x + 2y = − 2

and

3 x − 2y = − 5

add together

6x + 3x + 2y - 2y = -2 + -5

9x + 0 = -7

9x = -7

then x = -7/9

and y = -3x - 1:

y = -3*(-7/9) - 1

y = 7/3 - 1 = 4/3

solution: (-7/9, 4/3)

-----------------------------------------

6x+2y= -2 and 3x−2y =−5

6x + 3x + 2y - 2y = -2 + -5

7 0

3 years ago

let a,b,c,d be four integers (not necessarily distinct) in the set {1,2,3,4,5}. the no. of polynomials x^4+ax^3+bx^2+cx+d which

Eddi Din [679]

By either long or synthetic division, it's easy to show that

$\dfrac{x^4+ax^3+bx^2+cx+d}{x+1}=x^3+(a-1)x^2+(-a+b+1)x+(a-b+c-1)-\dfrac{a-b+c-d-1}{x+1}$

The quartic will be exactly divisible by $x+1$ when the numerator of the remainder term vanishes, or for those values of $a,b,c,d$ such that

$a-b+c-d-1=0$

I'm not sure how to count the number of solutions (software tells me it should be 80), but hopefully this is a helpful push in the right direction.

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3 years ago

B(n)=-1(2)n-1 what's the 5th term in the sequence

Katena32 [7]

B5 = -1 x (2 ^ 5 - 1)
B5 = -1 x (2 ^ 4)
B5 = -1 x 16
B5 = -16

8 0

3 years ago

Tell whether the ordered pair (- 3, 0) is a solution of the given system. - 2x + 2y >= 4an y >= 2x - 6

alukav5142 [94]

Answer:

The ordered pair is a solution.

Step-by-step explanation:

Plug x = -3 and y = 0 into the 2 inequalities and see if they fit:

-2x + 2y >= 4

-2(-3) + 2(0) = 6 which is > 4 so this one fits.

y>= 2x - 6

0 >= 2*-3) - 6 = -12 which also fits.

8 0

3 years ago

Read 2 more answers