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3 years ago

Please help ASAP. The question is down below. Thanks

Mathematics

1 answer:

beks73 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

there is three sections to be fenced using 78 m of fence so it would be letter B.

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I guessed Andy was 32 years old, but he's actually 38 years old. What is my percent of error?

Margaret [11]

Answer:

32 of 38 is 84.210% that's your answer

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3 years ago

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Given P = 2 (l + b) when l = 15 and P = 50, find b

Firdavs [7]

Answer:

b = 10

Step-by-step explanation:

P = 2 (l + b)

l = 15

P = 50

Substitute

50 = 2 (15 + b)

multiply

50 = 30 + 2b

subtract

20 = 2b

divide

b = 10

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3 years ago

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Geometry question, need help.

Margaret [11]

It would be choice A

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3 years ago

Solve the following quadratic by completing the square. y = x^2 - 6x+7

kozerog [31]

Answer:

$x= 3+\sqrt{2}, \quad x= 3 -\sqrt{2}$

Step-by-step explanation:

Given quadratic equation:

$y = x^2 - 6x+7$

To complete the square, begin by adding and subtracting the square of half the coefficient of the term in x:

$\implies y = x^2 - 6x+\left(\dfrac{-6}{2}\right)^2-\left(\dfrac{-6}{2}\right)^2+7$

$\implies y = x^2 - 6x+\left(-3\right)^2-\left(-3\right)^2+7$

$\implies y = x^2 - 6x+9-9+7$

Factor the perfect square trinomial:

$\implies y=(x-3)^2-9+7$

$\implies y=(x-3)^2-2$

To solve the quadratic, set it to zero and solve for x:

$\implies (x-3)^2-2=0$

$\implies (x-3)^2-2+2=0+2$

$\implies (x-3)^2=2$

$\implies \sqrt{(x-3)^2}=\sqrt{2}$

$\implies x-3= \pm\sqrt{2}$

$\implies x-3+3= 3\pm\sqrt{2}$

$\implies x= 3\pm\sqrt{2}$

Therefore, the solution to the given quadratic equation is:

$x= 3+\sqrt{2}, \quad x= 3 -\sqrt{2}$

6 0

1 year ago

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Choose the correct zeros for the following quadratic function.

bezimeni [28]

Replace f(x) with 0. Then solve for x

f(x) = x^2 + 5x - 14
0 = x^2 + 5x - 14
x^2 + 5x - 14 = 0
(x+7)(x-2) = 0 ... factor (think of two numbers that multiply to -14 and add to 5)
x+7 = 0 or x-2 = 0
x = -7 or x = 2

The two zeros, roots, or x intercepts are x = -7 or x = 2

Answer: Choice C) {2, -7}

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3 years ago

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