All categories

3 years ago

N + 16 = 9 Please help me need explanation

Mathematics

2 answers:

e-lub [12.9K]3 years ago

6 0

Answer: n = -7

Step-by-step explanation: Move all terms not containing n to the right side of the equation.

Hope this helps you out! ☺

vlabodo [156]3 years ago

5 0

Answer:

n = -7

Step-by-step explanation:

You do cancels and removal out by inverse operation to find the answer.

Step 1: Write out the equation.

n+16=9

Step 2: Subtract both sides by 16 to cancel out the positive 16.

n +<u>16 (-16)</u> = 9 -16

Step 3: After +16-16, 9-16, you shall not have any more operations like (+, -, *, or / )

n = -7

You might be interested in

during a softball game kay hit a fly ball the function f(x) = -16t^2 + 64t + 4 describes the height of the softball in feet. mak

STatiana [176]

<h2>Hello!</h2>

The graph is attached.

To graph a parabola we need to know the following:

- If the parabola is open upwards or downwards

- They axis intercepts (if they exist)

- The vertex position (point)

We are given the function:

$f(t)=-16t^{2}+64t+4$

Where,

$a=-16\\b=64\\c=4$

For this case, the coefficient of the quadratic term (a) is negative, it means that the parabola opens downwards.

Finding the axis interception points:

Making the function equal to 0, we can find the x-axis (t) intercepts, but since the equation is a function of the time, we will only consider the positive values, so:

$f(t)=-16t^{2}+64t+4\\0=-16t^{2}+64t+4\\-16t^{2}+64t+4=0$

Using the quadratic equation:

$\frac{-b+-\sqrt{b^{2}-4ac } }{2a}=\frac{-64+-\sqrt{64^{2}-4*-16*4} }{2*-16}\\\\\frac{-64+-\sqrt{64^{2}-4*-16*4} }{2*-16}=\frac{-64+-\sqrt{4096+256} }{-32}\\\\\frac{-64+-\sqrt{4096+256} }{-32}=\frac{-64+-(65.96) }{-32}\\\\t1=\frac{-64+(65.96) }{-32}=-0.06\\\\t2=\frac{-64-(65.96) }{-32}=4.0615$

So, at t=4.0615 the height of the softball will be 0.

Since we will work only with positive values of "x", since we are working with a function of time:

Let's start from "t" equals to 0 to "t" equals to 4.0615.

So, evaluating we have:

$f(0)=-16(0)^{2}+64(0)+4=4\\\\f(1)=-16(1)^{2}+64(1)+4=52\\\\f(2)=-16(2)^{2}+64(2)+4=68\\\\f(3)=-16(3)^{2}+64(3)+4=52\\\\f(4.061)=-16(4.0615)^{2}+64(4.0615)+4=0.0034=0$

Finally, we can conclude that:

- The softball reach its maximum height at t equals to 2. (68 feet)

- The softball hits the ground at t equals to 4.0615 (0 feet)

- At t equals to 0, the height of the softball is equal to 4 feet.

See the attached image for the graphic.

Have a nice day!

3 0

3 years ago

A diver begins at 140 feet below sea level. She descends at a steady rate of 7 feet per minute for 4.5 minutes. Then, she ascend

PSYCHO15rus [73]

3576 rheuioryu terotueiopltuils;j fjidsa;l foiurw0qps buqoeupw7 0 [auuq3809pb r4

8 0

3 years ago

Please help me with this!!

Troyanec [42]

Answer:

As the height increases, the temperature decreases.

It is decreasing 5°C per kilometer.

At the height 8 km the temperature is 0°.

5 0

3 years ago

A group of farmers bought 28 tractors and trucks. There were 1.8 times more tractors than trucks. How many tractors and how many

Oxana [17]

There are 10 trucks and 18 tractors
I found that out by multiplying 10 and 1.8 which gave me 18
when u add 10 and 18 u get 28

5 0

3 years ago

Read 2 more answers

Complete the function remove_all(L, x) so that, given a list L and a target value x, it returns a copy of the list that excludes

tia_tia [17]

Answer:

Code is given below along with explanation and output.

Step-by-step explanation:

we can use the method of list comprehension to achieve the given task.

In a list comprehension, we create a sub-list of elements which satisfy specific conditions. the condition i !=x makes sure that x would be excluded in the modified list.

def remove_all(L, x):

return [i for i in L if i != x]

L = [1, 2, 3, 4, 5, 6, 4, 3, 2, 4 ]

print('Before =',L)

L = remove_all(L, 4)

print('After =',L)

Output:

Before = [1, 2, 3, 4, 5, 6, 4, 3, 2, 4]

After = [1, 2, 3, 5, 6, 3, 2]

As you can see we have successfully removed the multiple occurrence of x=4 while preserving the order of the list.

4 0

3 years ago