All categories

3 years ago

30 POINTS Solve by the linear combination method.

2 answers:

8 0

4x – 5y = –18 (1st)
3x + 2y = –2 (2nd)

Multiply 1st equation by 2 and 2nd equation by 5

4x – 5y = –18 (1st) (mul. 2)
3x + 2y = –2 (2nd) (mul. 5)

8x - 10y = - 36
15x + 10y = - 10
-----------------------add
23x = - 46
x = -2

3x + 2y = –2
3(-2) + 2y = –2
-6 + 2y = -2
2y = 4
y = 2

(-2,2)

answer

(–2, 2)

Katen [24]3 years ago

6 0

Answer:

Step-by-step explanation:

Solve by the linear combination method.

4x – 5y = –18

3x + 2y = –2

i selected the incorrect answer and the correct answer is bellow.

Selected Answer:

Incorrect

(–2, 7)

Correct Answer:

Correct

(–2, 2)

You might be interested in

Put in standard form; identify degree and leading coefficient of polynomial: -4x + 3x2 - 2 + 4x3

Fofino [41]

Answer:

-4 (x-4)

Step-by-step explanation:

simplify the expression

-4x + 16

4 0

3 years ago

Solve each equation for 37 points

NARA [144]

The answer to A is the pic below

6 0

3 years ago

Read 2 more answers

Valuate the line integral, where c is the given curve. ∫c zdx + xdy + ydz

Semenov [28]

$\displaystyle\int_{\mathcal C}z\,\mathrm dx+x\,\mathrm dy+y\,\mathrm dz=\int_{\mathcal C}\langle z,x,y\rangle\cdot\mathrm d\langle x,y,z\rangle$
$\displaystyle=\int_{t=0}^{t=1}\langle t^2,t^2,t^3\rangle\cdot\mathrm d\langle t^2,t^3,t^2\rangle$
$=\displaystyle\int_0^1\langle t^2,t^2,t^3\rangle\cdot\langle2t,3t^2,2t\rangle\,\mathrm dt$
$=\displaystyle\int_0^15t^4+2t^3\,\mathrm dt=\frac32$

3 0

4 years ago

Question 9

timurjin [86]

Answer:

The required number is 70.

Step-by-step explanation:

let the no. be 10y + x where x is unit digit and y is ten's digit.

given , sum of the digit is 7

x + y = 7 ...(1)

also , reversing the no. we get 10x + y ,where x is ten's digit and y is unit digit.

given reversed digit decreases the number by 63 .

so, 10y + x - ( 10x + y ) = 63

9y -9x = 63

( dividing both side by 9 )

y - x = 7 ....(2)

adding 1 and 2 [ refer attachment ]

so the required original number is

10y + x = 10×7+0 = 70

8 0

2 years ago

Can y’all help me with this worksheet please

Pavel [41]

Answer:

Step-by-step explanation:

-10 + 4 i

4 0

3 years ago