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Sauron [17]
3 years ago
14

Which answer choice is equivalent to the expression below?

Mathematics
2 answers:
Sloan [31]3 years ago
5 0

Answer: A. -17-9n

Step-by-step explanation:

ololo11 [35]3 years ago
3 0

Answer:

Final answer is choice a). -17-9n

Step-by-step explanation:

Given expression is

-7\left(2+n\right)+\frac{1}{3}\left(-9-6n\right)

=-14-7n+\frac{1}{3}\left(-9-6n\right)

=-14-7n-3-2n

=

=-14-3-7n-2n

=-17-9n

Hence final answer is choice a). -17-9n


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A tunnel is constructed with a semielliptical arch. The width of the tunnel is 80 feet, and the maximum height at the center of
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Answer:

Step-by-step explanation:

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For given problem:

b=20

b^2=400

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a^2=900

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7 0
3 years ago
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Step-by-step explanation:

1. Create your own example and explain how to solve Quadratic Equation using Quadratic Formula.

The quadratic formula is used to solve quadratic equations. It is shown as   x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

A quadratic equation is generally shown in the form of ax^{2} +bx + c = 0

For example, if you saw the equation  7x^{2} + 3x + 20 = 0

7 would be a, 3 would be b, and 20 would be c.

To solve the equation above, you would fill in the quadratic formula as such, x=\dfrac{-3\pm\sqrt{(3)^2-4(7)(20)}}{2(7)}

Then you could solve for x.

2. What part in the Quadratic Formula is the discriminant?

The discriminant is the equation under the square root on the quadratic formula, b^{2} - 4ac

It is tells us whether there are two solutions, one solutions, or no solutions.

3.  How do you know the number of solutions based on the value of the discriminant?

To know the number of solutions based off of the value of the discriminant, you need to plug in your values. Using the example quadratic equation, 7x^{2} + 3x + 20 = 0

We will plug the values into the discriminant.

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Now, if the discriminant is positive it has two real solutions. If the discriminant is zero the equation has no real-number solutions. And finally, if the discriminant is negative, the equation has one real solution. Because our discriminant is -551, the example equation has one real solution.

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8 0
3 years ago
A population of 200 animals has a growth rate of 1.03% each year. at this growth rate, the function f(x)=200(1.03)^x gives the p
Y_Kistochka [10]
For this case, the first thing we should do is use the following equation:
 f (x) = 200 (1.03) ^ x
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The answers r online for that
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2 years ago
Solve for x. 9≤17−4x Enter your answer, as an inequality, in the box.
Stella [2.4K]
9 ≤ 17 - 4x

9 - 17 ≤ 17 - 17 - 4x

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x≤ 2

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