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lubasha [3.4K]
3 years ago
11

Solve the system of equations below algebraically 2x-3y=8 4x+2y= 10

Mathematics
1 answer:
Deffense [45]3 years ago
7 0

2x - 3y = 8 \\ 4x + 2y = 10 \\  \\  - 4x + 6y =  - 16 \\  \:  \: 4x + 2y = 10 \\  \\ 8y =  - 6 \\ y =   \frac{ - 6}{8}  =  \frac{ - 3}{4}  \\  \\ 4x - 2( \frac{ - 3}{4} ) = 10 \\ 4x +  \frac{3}{2}  = 10 \\ 4x =  \frac{17}{2} \\ x =  \frac{17}8
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Help please, I'm stuck on this :/
nlexa [21]

Do you have a calculator? you can solve it by substituting x.

y=16x^2

0: y = 16(0)^2 = 16(0) = 0

(x = 0 , y = 0)

0.5: y = 16(0.5)^2 = 16(0.25) = 4

(x = 0.5 , y = 4)

1: y = 16(1)^2 = 16(1) = 16

(x = 1 , y = 16)

1.5: y = 16(1.5)^2 = 16(2.25) = 36

(x = 1.5 , y = 36)

2: y = 16(2)^2 = 16(4) = 64

(x = 2 , y = 64)

2.5: y = 16(2.5)^2 = 16(6.25) = 100

(x = 2.5 , y = 100)

3 : y = 16(3)^2 = 16(9) = 144

(x = 3 , y = 144)

4: y = 16(4)^2 = 16(16) = 256

(x = 4 , y = 256)

if you multiply a negative number by itself, it will become positive. So, -4, -3, -2.5, -2, -1.5, -1, -0.5 will be the same as the positive 4, 3, 2.5, 2, 1.5, 1, 0.5.

I'm not sure about the pattern, but if you graph it, it'll be symmetrical across the y-axis.

8 0
3 years ago
The answer to a subtraction problem​
Ronch [10]

Answer:

The answer in a subtraction problem is called the difference.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
1,985 + 12,000 + what ? = 14,471 .
Scrat [10]

Answer:

486

Step-by-step explanation:

1,985 + 12,000 + x = 14,471

x = 14471 - 12000 - 1985

x = 486

6 0
3 years ago
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For which value of x is the equation 3(3 + x) = 15 + x true?<br> A) 1 <br> B) 2 <br> C) 3 <br> D) 4
natulia [17]

Answer:

C

Step-by-step explanation:

3(3 + x) = 15 + x

Open bracket

9 + 3x = 15 + x

Collecting like terms

3x - x = 15 - 9

2x = 6

Dividing by 2

x = 6/2

x = 3

3 0
3 years ago
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What is the axis of symmetry of the function f(x)= -(x+9)(x-21)
Vinil7 [7]

Answer:

The axis of symmetry is x = 6

Step-by-step explanation:

To find this, first find the two x-intercept values and then take the average. This will always be the line of symmetry.

x + 9 = 0

x = -9

x - 21 = 0

x = 21

Now take the average of these two numbers.

(-9 + 21)/2

12/2

6

6 0
2 years ago
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