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3 years ago

Please help me with this

Mathematics

1 answer:

rodikova [14]3 years ago

3 0

To begin to find the answer, start by setting up this equation:
$n + 5 = 2n - 6$
After solving for the variable n, we find the answer n = 11. Plugging the value into the term that represents the length of the line FG, we find:
$2(11) - 6 = 16$
Final Answer: FG = 16

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The distance around a circle<br> is 56.55 meters long. What<br> diameter of the circle?

VARVARA [1.3K]

Answer:

113.1

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

Use an equation to find the value of k so that the line passing through (−4,k) and (6,−7) has a slope of −1/5.

Virty [35]

Answer:

k = -5

Step-by-step explanation:

Hi there!

$m=\displaystyle \frac{y_2-y_1}{x_2-x_1}$ where the two points are $(x_1,y_1)$ and $(x_2,y_2)$

Plug in the given information:

$\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{6-(-4)} \\\\\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{6+4} \\\\\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{10} \\\\\displaystyle -\frac{2}{10}= \displaystyle- \frac{-7-k}{10} \\\\-2=-7-k\\k=-5$

I hope this helps!

3 0

3 years ago

Read 2 more answers

Evaluate cot 290º. Round your answer to the nearest hundredth. Explain each step

Paladinen [302]

Looking at the unit circle:
tanӨ = tan(Ө <span>± 180k)
If we add/subtract 180° from our angle, it simply ends up on the other side of the unit circle. Since tan</span>Ө is represented as slope, the values of the two are the same.

cotӨ is defined as the reciprocal of tanӨ (1/tanӨ)
If tanӨ = tan(Ө ± 180k), then we could also say that
1/tanӨ = 1/tan(Ө ± 180k) which then becomes cotӨ = cot(Ө ± 180k)

Let's apply this to cot(290°).
Subtract 180° to find that cot(290°) = cot(110°)

cot(110°) = -cot(70°) because the angle has been reflected across the y axis, making its slope opposite.

-cot(70°) = -1/tan(70°) because of that reciprocal property from earlier
tan(70°) ≈ 2.75
-1/tan(70°) ≈ -0.36 = cot(290°)

(of course, most calculators can handle tan(110°), but if you're using a trig chart it might not be on there. include whichever steps are necessary)

5 0

3 years ago

Your friend incorrectly says the solution to the equation 11.2y - 7.4y=141.36 is y=7.6 what error did your friend make? A) Divid

krek1111 [17]

The correct answer is: D) Subtracted like terms incorrectly

Step-by-step explanation:

Given

$11.2y - 7.4y=141.36$

The terms 11.2y-7.4y need to be subtracted. But option b is to add them. We will add them and then solve the equation to see if its right.

So adding 11.2y-7.4y

$18.6y=141.36$

Dividing both sides by 18.6

$\frac{18.6y}{18.6}=\frac{141.36}{18.6}\\y=7.6$

so by adding the terms instead of subtracting we get y=7.6.

this means that the error was adding 7.4y-11.2y instead of subtracting

The correct method will be:

$11.2y - 7.4y=141.36\\3.8y=141.36$

Dividing both sides by 3.8

$\frac{3.8y}{3.8}=\frac{141.36}{3.8}\\y=37.2$

Hence,

The correct answer is: D) Subtracted like terms incorrectly

Keywords: Linear equation, Expression

Learn more about linear expressions at:

#LearnwithBrainly

8 0

3 years ago

Find the value of x.

vovangra [49]

Answer:

1. 2=x+41

‐x=41‐2

x=‐39

2. 2=4+7×

‐7×=4‐2

7×=2

3. 2=10×+8

‐10×=8‐2

‐5×=3

5×=‐3

4.2=×+141

‐x+2=141

‐x=139

5 0

3 years ago