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ASHA 777 [7]
3 years ago
12

Which of the following are identities?

Mathematics
2 answers:
USPshnik [31]3 years ago
4 0

Answer:

I believe that the answer is 1

Step-by-step explanation:

So an identity is an equation that both sides are equal.  So in the first answer 3(5 +2x)=15+6x  equals each other because after distributing the 3 into the (5+2X) it equals 15+6x

Bas_tet [7]3 years ago
3 0

Answer:

A

Step-by-step explanation:

3(5 + 2x) = 15 + 6x

15 + 6x = 15 + 6x

6x - 6x = 15 - 15

0 = 0

No solution, no identity.

y = x + 3

No identity.

Identity : a² - b² = (a + b) (a - b)

The only identity is option 3.

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write the ratio for the following description. kaleel made three times as many baskets as john during basketball practice.
Elena L [17]

Ratio is 3:1


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5 0
3 years ago
Find the vertex form of: y=2x^2-5x+13
Ket [755]
The vertex form of a quadratic function is:

 f(x) = a(x - h)² + k

The coordinate (h, k) represents a parabola's vertex.

In order to convert a quadratic function in standard form to the vertex form, we can complete the square.

y = 2x² - 5x + 13

Move the constant, 13, to the other side of the equation by subtracting it from both sides of the equation.

y - 13 = 2x² - 5x

Factor out 2 on the right side of the equation.

y - 13 = 2(x² - 2.5x)

Add (b/2)² to both sides of the equation, but remember that since we factored 2 out on the right side of the equation we have to multiply (b/2)² by 2 again on the left side.

y - 13 + 2(2.5/2)² = 2(x² - 2.5x + (2.5/2)²)

y - 13 + 3.125 = 2(x² - 2.5x + 1.5625)

Add the constants on the left and factor the expression on the right to a perfect square.

y - 9.875 = 2(x - 1.25)²

Now, we need y to be by itself again so add 9.875 back to both sides of the equation to move it back to the right side.

y = 2(x - 1.25)² + 9.875

Vertex: (1.25, 9.875)

Solution: y = 2(x - 1.25)² + 9.875

Or if you prefer fractions

y = 2(x - 5/4)² + 79/8
7 0
3 years ago
I really need help on this question.!
IrinaVladis [17]

Answer:

b = 135 \\ a + c = 45(ie \: 180 - 135)  \\ a =  \frac{45}{2}  \\ a = 22.5

4 0
2 years ago
Choose like terms:<br><br> 3x, y, 2x
Tresset [83]
3x and 2x are alike terms, as they have the same variable
4 0
3 years ago
Help please is it b?
iogann1982 [59]
I just took that quiz on k12. The answer is no solution. Hope I helped!
6 0
3 years ago
Read 2 more answers
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