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WITCHER [35]
3 years ago
10

Please help me ASAP!!

Mathematics
1 answer:
Sati [7]3 years ago
3 0

The answer is D, i.e. the system was solved via elimination


If you multiply the first equation by 5, the system becomes


\left \{ {{-5x-10y=35} \atop {5x-6y=-3}} \right.


If you sum the two equations, you get


-16y = 32


And so if you substitute the second equation of system A with this new equation, you'll get system B.

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Are the equations 9x=5x+4 and 14x=4 equivilant?​
Paha777 [63]

Answer:

No

Step-by-step explanation:

First solve both equations:

1) 9x = 5x + 4

Simplifying

9x = 5x + 4

Reorder the terms:

9x = 4 + 5x

Solving

9x = 4 + 5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5x' to each side of the equation.

9x + -5x = 4 + 5x + -5x

Combine like terms: 9x + -5x = 4x

4x = 4 + 5x + -5x

Combine like terms: 5x + -5x = 0

4x = 4 + 0

4x = 4

Divide each side by '4'.

x = 1

Simplifying

x = 1

2) 14x = 4

14x = 4 (divide both sides by 14 to get x)

14x/14 = 4/14

x = 0.285714285714

As you can see, the value of x in the second equations is less than one, therefore making these algebraic equations not equivalent.

4 0
2 years ago
Read 2 more answers
26 × (– 48) + (– 48) × (–36).
Rina8888 [55]

Answer:

480

Step-by-step explanation:

(26*-48)+(-48*-36)

-1248 + 1728

480

6 0
1 year ago
If angle 3 is congruent to angle 4, then find the measure of angle 3 to the ratio of the measure of angle 4.
djyliett [7]

Answer:

bhdwkvdveqvhjvhjawvhjcddvscg

wvvdgvewagvdgwvgdvwgevdegw

Step-by-step explanation:

8 0
4 years ago
If
Dovator [93]

12^2=144

144 is divided by b which also is an odd interger, there only 2 numbers : 1 and 3

if b=3, a^2=48, then there will be no a available

if b=1 , a^2=144, then a is 12 and 12 can not be divided by 9

The answer is D

3 0
4 years ago
a figure has the coordinates (0,0) (0,15) and (8,0). If the figure is rotated about the y- axis, what is the volume of the shape
AfilCa [17]

Answer:

120

Step-by-step explanation:

15 x 16/2

You double 8 because your rotating around the y-axis

3 0
3 years ago
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