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Yuliya22 [10]
3 years ago
11

50 points need help

Mathematics
2 answers:
jolli1 [7]3 years ago
7 0

Answer:

x = 111

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

here n = 7

sum = 180° × 5 = 900°

Sum the given angles in the polygon and equate to 900

125 + 126 + 158 + 120 + x + 139 + 121 = 900

789 + x = 900 ( subtract 789 from both sides )

x = 111

sladkih [1.3K]3 years ago
4 0

Hi, hope this helps :)

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Lynette can wash 95 cars in 5 days how many cars can she wash in 11 days​
STatiana [176]

Find how many cars she can wash in one day:

95 cars / 5 days = 19 cars per day.

Now multiply by 11 days:

19 cars per day x 11 days = 209 total cars.

7 0
3 years ago
Write a story problem for the ratio 4:5.
Cerrena [4.2K]

Answer:

I went to the store and bought 4 oranges for every 5 grapefruits.

Step-by-step explanation:

Hope it is good enough and have a great day! :)

8 0
3 years ago
1. Using the formula for the probability of one event or another event, calculate the probability of drawing a card from a stand
ddd [48]
A standard deck has 52 cards.
A standard deck has 4 jacks.
A standard deck has 13 clubs.

From this, we can derive the following:
The probability of drawing a jack is 4/52 or 1/13
The probability of drawing a club is 13/52 or 1/4

But since the problem asks for drawing jack or club, therefore we should add the 2 probabilities, making 17/52. This is not the final answer yet. We know that there is a jack of clubs, therefore we need to subtract 1 from the probabilities since jack of clubs were considered in the 2 categories of probability.

With that being said, the probability of drawing a club or a jack is 16/52 or 4/13

Bonus Question:

The first thing you need to do here is find the probability of each scenario. First let's do what is given, the probability of drawing 2 aces. Since there are 4 aces in a deck of 52, we can easily say that the probability of drawing an ace is 4/52. However for our second draw, the probability of drawing a different ace is 3/51. This is so since we already drew a card that is an ace, hence we need to subtract one from the total aces (4-1) and from the total cards in the deck (52-1). In getting the probability of drawing two aces, we need to multiply the said probabilities: 4/52 and 3/51, resulting to 1/221.

For the second scenario, the drawing of 2 red cards, we just use the same concept but in this, we are already considering the 2 red cards in the first scenario, therefore the chance of drawing a red on our first draw is 24/52. For our second, we just need to subtract one card, therefore 23/51. Multiply these two and we will get 46/221.

Now, the problem asks for the chance of drawing either 2 reds or 2 aces, therefore we add the probabilities of the 2 scenarios:
46/222 + 1/221 = 47/221

Summary:
First Scenario:
4/52 + 3/51 = 1/221
Second Scenario:
24/52 + 23/51 = 46/221
Chances of drawing 2 red cards or 2 aces:
1/221 + 46/221 = 47/221
7 0
3 years ago
What is a formula to calculate the area of cross section when the figure is in circular shape​
Naddik [55]

Answer:

Area for cross-section is 615.7521601cm

Step-by-step explanation:

area of a circle = πr²

π × radius²

In this question, the radius is 14, so you need to square it giving 196.

Then multiply by π = 615.7521601cm (round if necessary)

7 0
2 years ago
What is y= X/2 + 9; x= -12
Lelu [443]
-12/2=-6
y=-6+9
-6+9=3
y=3
4 0
3 years ago
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