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Rom4ik [11]
3 years ago
10

Algebra 1 system of equations -10x − 7y = -12x = 4

Mathematics
2 answers:
leonid [27]3 years ago
7 0

=  >  \:  - 10x - 7y =  - 12 \\  =  >  \:  - 10(4) - 7y =  - 12 \\  =  >  \:  - 40 - 7y =  - 12 \\  =  >  \:  - 7y =  - 12 + 40 \\  =  >  \:  - 7y = 28 \\  =  > y =   -  \frac{28}{7}  \\  =  >  \: y =  - 4
Hope this helps!
ira [324]3 years ago
5 0

I'm not sure about this but this is what I got

X= -2/11, 7/22

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Johanna has to solve the system of equations using substitution. She isolates x in the second equation. Which should be her next
olganol [36]

Answer: A) 3(10 - 5y) + 6y =12

Step-by-step explanation:

As per the question , the given system of linear equation :

3x+6y=12---(i)\\\\ x+5y=10---(ii)

Here , To solve the system of equations using substitution , Johanna isolates x in the second equation and writes

x=10-5y

As per the substitution method , the next step is to substitute the isolated value of 'x' in first equation , thus the next step will become

3(10-5y)+6y=12

Hence, the correct option is A) 3(10 - 5y) + 6y =12

6 0
3 years ago
I GIVE BRAINLILSET
Murljashka [212]

Answer:

60

Step-by-step explanation:

25÷5=5

5×12=60

have a great day! :)

4 0
3 years ago
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What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
melamori03 [73]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Factor completly 4x^2 +8x -5
DaniilM [7]

∑ Hey, jillianwagler ⊃

Answer:

\left(2x-1\right)\left(2x+5\right)

Step-by-step explanation:

<u><em>║Given info║:</em></u>

<em>Factor completely: </em>4x^2 +8x -5

<u><em>Solution~:</em></u>

<em>Breaking the expression~:  </em>\left(4x^2-2x\right)+\left(10x-5\right)

<em>Factor out 2x from 4x² -2x : 2x(2x-1)</em>

<em>Factor out 5 from 10x - 5 : 5(2x - 1)</em>

<em>Put together: </em>=2x\left(2x-1\right)+5\left(2x-1\right)

Factor out 2x - 1: =\left(2x-1\right)\left(2x+5\right)

<u><em>xcookiex12</em></u>

<em>8/19/2022</em>

4 0
2 years ago
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th
Anni [7]

Answer: The rocket will reach its max after 4 seconds

Step-by-step explanation:

Hi, to find the maximum height, we have to set the first derivative of the equation equal to zero.

y=-16x^2+128x+136

0 = (2)-16x +128  

0= -32x+128

Solving for x:

32x = 128

x = 128/32

x = 4 seconds

The rocket will reach its max after 4 seconds

Feel free to ask for more if needed or if you did not understand something.

7 0
3 years ago
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