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Monica [59]
4 years ago
5

What formula can you use to find the nth triangular number

Mathematics
1 answer:
Ray Of Light [21]4 years ago
6 0

Answer:

xn = n·(n + 1)/2

Step-by-step explanation:

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Jonathan is designing a rectangular path for his garden using paving stones. The paving stones are square and 50cm wide. If the
koban [17]

Answer: 32 paving stones

Step-by-step explanation:

Hi, to answer this question, first we have to convert the measures of the paving stones into meters.

Since: 1m = 100 cm

50 cm /100 = 0.5m

Now, we have to calculate the area of each paving stone:

Area of a square: s^2 = 0.5^2 = 0.25m2

Next, the area of the path.

Area of a rectangle = width x length = 1 x 8 = 8 m2

Finally, we have to divide the area of the path by the area of each paving stone:

8/0.25 = 32 paving stones

Feel free to ask for more if needed or if you did not understand something.

8 0
3 years ago
Read 2 more answers
True or false a rectangle is a parallelogram with a right interior angle?
oee [108]
I definitely would say True. 
7 0
3 years ago
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What are the sizes of x , y and z
Fiesta28 [93]

Answer:

x=70°

y=30°

z=20°

Step-by-step explanation:

You first need to find y, which would be 30 because the sum of the first two angles is 150, and a triangle has 180 degrees, so 180-150=30.

By finding y, we can now find a, because if you take the entire triangle, y+z must equal 50. So, z=20 because 30+z=50.

And finally, we can find x to be 70 since the sum of the two other angles is 110 and 180-110=70.

5 0
3 years ago
One of the giraffes, Bernard, is sick. Last week he weighed 2,490 pounds. This week he weighs 2,312 pounds. If w represents the
victus00 [196]

Answer:

w+2,312=2,490

w=178\ pounds

Step-by-step explanation:

Let

w ----> the amount of weight lost in pounds

we know that

The amount of weight Bernard lost plus the weight of this week must be equal to the weight of the last week

so

The linear equation that represent this situation is

w+2,312=2,490

solve for w

subtract 2,312 both sides

w=2,490- 2,312=178\ pounds

4 0
3 years ago
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The sum of (3 - 5i) + (-2 + 8i) is
andreyandreev [35.5K]

Answer:

<em><u>Answer is below</u></em>

Step-by-step explanation:

<u><em>3−5i−2+8i</em></u>

<u><em>=1+3i</em></u>

8 0
3 years ago
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