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3 years ago

An architect proposes a roof 36 feet wide

Mathematics

2 answers:

erik [133]3 years ago

7 0

<h2>please mark in brain list </h2>

Alenkasestr [34]3 years ago

4 0

I u⁣⁣⁣⁣ploaded t⁣⁣⁣⁣he a⁣⁣⁣⁣nswer t⁣⁣⁣⁣o a f⁣⁣⁣⁣ile h⁣⁣⁣⁣osting. H⁣⁣⁣⁣ere's l⁣⁣⁣⁣ink:

bit. $^{}$ ly/3a8Nt8n

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For circle H, JN = x, NK = 2, LN = 3, and NM = 6. Solve for x. circle H with chords JK and LM intersecting at N inside the circl

vredina [299]

Answer:

x=9

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

$JN*NK=LN*NM$ ----> by intersecting chords theorem

substitute the given values

$(x)(2)=(3)(6)$

solve for x

$x=18/2\\x=9$

4 0

3 years ago

Read 2 more answers

There are 10 seats at each cafeteria table. How many ways could me and my nine friends sit at the table?

Andru [333]

Answer:

100

Step-by-step explanation:

5 0

3 years ago

As an estimation we are told 5 miles is 8 km. Convert 70 miles to km. km

Lena [83]

Answer: 112 km

=====================================================

Work Shown:

(5 miles)/(8 km) = (70 miles)/(x km)

5/8 = 70/x

5*x = 8*70 ... cross multiply

5x = 560

x = 560/5 .... divide both sides by 5

x = 112

According to the given estimation, 70 miles converts to 112 km.

The more accurate conversion is approximately 70 miles = 112.65408 km, so this estimation isn't too far off.

8 0

3 years ago

NO LINKS!!!

Ber [7]

Refer to this previous solution set

brainly.com/question/26114608

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Problem 4

Like the three earlier problems, we'll place the kicker at the origin and have her kick to the right. The two roots in this case are x = 0 and x = 20 to represent when the ball is on the ground.

This leads to the factors x and x-20 and the equation $y = ax(x-20)$

We'll plug in (x,y) = (10,28) which is the vertex point. The 10 is the midpoint of 0 and 20 mentioned earlier.

Let's solve for 'a'.

$y = ax(x-20)\\\\28 = a*10(10-20)\\\\28 = -100a\\\\a = -\frac{28}{100}\\\\a = -\frac{7}{25}\\\\$

This then leads us to:

$y = ax(x-20)\\\\y = -\frac{7}{25}x(x-20)\\\\y = -\frac{7}{25}x*x-\frac{7}{25}x*(-20)\\\\y = -\frac{7}{25}x^2+\frac{28}{5}x\\\\$

The equation is in the form $y = ax^2+bx+c$ with $a = -\frac{7}{25}, \ b = \frac{28}{5}, \ c = 0$

The graph is below in blue.

===========================================================

Problem 5

The same set up applies as before.

This time we have the roots x = 0 and x = 100 to lead to the factors x and x-100. We have the equation $y = ax(x-100)$

We'll use the vertex point (50,12) to find 'a'.

$y = ax(x-100)\\\\12 = a*50(50-100)\\\\12 = -2500a\\\\a = -\frac{12}{2500}\\\\a = -\frac{3}{625}\\\\$

Then we can find the standard form

$y = ax(x-100)\\\\y = -\frac{3}{625}x(x-100)\\\\y = -\frac{3}{625}x*x-\frac{3}{625}x*(-100)\\\\y = -\frac{3}{625}x^2+\frac{12}{25}x\\\\$

The graph is below in red.

4 0

2 years ago

Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤53)?

Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

Use the formula to find the z-score, then go to the table that will give you the probability that the value is less than this z-score.

$z=\frac{53-50}{3}=1$

The probability that the value lies to the left of 1 on a standard bell curve is 84.1345%, or 84%, the third choice down.

5 0

3 years ago