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Korolek [52]
3 years ago
13

Find the common difference for the arithmetic sequence. 1.7, 2.7, 3.7 4.7.....

Mathematics
1 answer:
Anni [7]3 years ago
5 0

Answer:

Step-by-step explanation:

You do not need to where the formula comes from but, just for fun, here’s a hint

To add up the numbers 1 to 10

Write out the numbers

1 2 3 4 5 6 7 8 9 10

Write them backwards

10 9 8 7 6 5 4 3 2 1

Add up both lists

11  11  11  11  11  11  11  11  11 11

This is 10 × 11 = 110

But this is twice the sum as two lots were added together

So the sum of the numbers 1 to 10 is 110 ÷ 2 = 55

 

ArSeqSum Notes fig4, downloadable IGCSE & GCSE Maths revision notes

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Please help i am super confused on what to do :)
Ludmilka [50]

Answer:

About 9.1 yards tall.

Step-by-step explanation:

So, we can draw the right triangle shown below:

We want to find h.

Since we know the angle and the side adjacent to the angle and we wan to find the opposite side, we will use the tangent ratio:

\displaystyle \tan(x^\circ)=\frac{\text{Opposite}}{\text{Adjacent}}

So:

\displaystyle \tan(20)=\frac{h}{25}

Therefore:

\displaystyle h=25\tan(20)

Use a calculator. Ensure your calculator is in the correct mode (degrees mode):

h\approx 9.1\text{ yards}

The goal post is around 9.1 yards tall.

7 0
3 years ago
Evaluate the following expression when x=3.<br><br> 2x+7
xxMikexx [17]

Answer:13

Step-by-step explanation:

2 times 3 is 6 so then we add 7 to get 13

6 0
3 years ago
The distance between points
nasty-shy [4]
Answer: B. False
Distance between points is square root of (x1 - x2) + (y1 - y2).

Hope it helped!
8 0
3 years ago
A rectangle is shown.<br><br> What is the area of the rectangle?
mixas84 [53]

Answer:

360

Step-by-step explanation:

15+15

12x15

4 0
3 years ago
Read 2 more answers
What is the least perimeter of a rectangle with an area of 32 square feet
DiKsa [7]
<span> The least perimeter occurs when rectangle is square. 

So you can start by taking square root of area; </span>√32

So each side is √32 and there are 4 sides

Hence least perimeter is 4√32 = 16√2 ≈ 22.627.
3 0
3 years ago
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