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Nastasia [14]
3 years ago
13

Someone help and plz make sure it’s right :)

Mathematics
2 answers:
KiRa [710]3 years ago
8 0

Answer:

-8

Step-by-step explanation:

-8+58=50

50+53+77=180

triangles angles should equal 180

Airida [17]3 years ago
6 0

Answer:

A triangle‘s angles should add up to 180 and the given angles sum up to 130 so x + 58 = 50 so x = -8

Hope this helped and brainliest please

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Katyanochek1 [597]
With rational coefficients (a, b and c), if one zero is rational, that means the discriminant is rational.  We can conclude that the other is also rational.
4 0
3 years ago
I need help please<br><br> I will give points and brainlest
Nastasia [14]

Answer:

  a. 2 7/9 miles

  b. 21.6 minutes

  c. 8 1/3 miles

Step-by-step explanation:

The rate at which Catlin runs can be determined from the graph by finding the coordinates of a grid point that lies on the line. The line goes through the origin, so the relationship between time and distance is proportional.

We see that the point (miles, minutes) = (1 2/3, 12) lies on the graph, so the contant of proportionality is ...

  k = y/x = 12/(5/3) = 36/5 = 7.2 . . . . minutes/mile

__

<h3>a.</h3>

The proportion can be written ...

  distance/(20 minutes) = (1 mile)/(7.2 minutes)

  distance = (20/7.2) miles = 2 7/9 miles

Catlin will run 2 7/9 miles in 20 minutes

__

<h3>b.</h3>

The proportion can be written ...

  time/(3 miles) = (7.2 minutes)/(1 mile)

  time = (3)(7.2 minutes) = 21.6 minutes

Catlin was running 21.6 minutes

__

<h3>c.</h3>

In 1 hour, Catlin will run 3 times as far as in 20 minutes. Using the result from part A, we find ...

  3(2 7/9 miles) = 8 1/3 miles 8 1/3 miles

Catlin will run 8 1/3 miles in one hour.

_____

<em>Additional comment</em>

Once we have a relationship between minutes and miles, we can write proportions with either of those numbers in the numerator or denominator. We find it convenient to put the unknown value in the numerator of a proportion, which is why the ratios are written differently in the different parts of the problem.

3 0
2 years ago
(12 + 31). Find the midpoint m of 21 (8 + 5i) and 22 Express your answer in rectangular form.​
In-s [12.5K]
I think the answer is 12
7 0
3 years ago
Urgent!
Varvara68 [4.7K]

Answer:

See explanation

Step-by-step explanation:

From the graph,

  • After 1 hour passed, 2 inches of show fell
  • After 5 hours passed, 10 inches of snow fell
  • And so on

This means, that points (1,2), (5,10) lie on the graph. This graph passes through the origin, so its equation is

y=kx,

where k is the slope

Find k:

2=k\cdot 1\\ \\k=2,

so the equation is y=2x and the slope is k = 2.

The slope means how many inches of snow fell in 1 hour.

In 1 hour, 2 inches of snow fell.

8 0
3 years ago
What is 5.9% of 7000? Round to the nearest hundredth (if necessary).
Vedmedyk [2.9K]

Answer:

413

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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