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garri49 [273]
3 years ago
10

The first term of an arithmetic sequence is -5, and the tenth term is 13. find the common difference

Mathematics
2 answers:
Zigmanuir [339]3 years ago
8 0

Answer:

2

Step-by-step explanation:

Equivalent question: Find the slope of line going through points (1,-5) and (10,13).

Line points up vertically and subtract. Then put 2nd difference on top of first difference.

(1,-5)

(10,13)

---------'subtracting

-9, -18

So the slope of the line gong through point's (1,-5) and (10,13) is -18/-9=2.

The common difference of an arithmetic sequence whose first term is -5 and whose tenth term is 13 is 2.

Vilka [71]3 years ago
4 0

Answer:

2

Step-by-step explanation:

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Ede4ka [16]
The formula for the area of a triangle is the base times the height, divided by 2. Or in simple forms, bh/2
7 0
3 years ago
The diameter of a circle is 22 miles. What is the circle's area? Use 3.14 for pi.. Single choice.
Sonbull [250]

Answer:

379.94 mi²

Step-by-step explanation:

The area of a circle can be figured out with this formula: πr² (3.14 is π here, as it says in the directions).

We know the diameter is 22 miles. Divide that by 2 to get a radius of 11 miles.

The equation now becomes

3.14(11²)

11 squared is 121.

3.14(121)

I recommend splitting the 121 into 100, 20, and 1.

(3.14 * 100) + (3.14 * 20) + (3.14 * 1)

Multiply 3.14 by 100, 20, and 1.

314 + 62.8 + 3.14

Add 314 and 62.8.

376.8 + 3.14

Add 376.8 and 3.14

379.94 mi² is the area of a circle with a 22-mile diameter.

6 0
2 years ago
Use the information given to identify the a9 term of the geometric sequence:
Black_prince [1.1K]
-3 that would be or should be that answer
6 0
2 years ago
Evaluate : 5-3(x-1) when x=7
Andrei [34K]

Answer:

<h3>\boxed{ \bold{ \boxed{ \sf{ - 13}}}}</h3>

Step-by-step explanation:

Given , x = 7

let's find :

\sf{5 - 3(x - 1)}

Plug the value of x

⇒\sf{5 - 3(7 - 1)}

Subtract 1 from 7

⇒\sf{5 - 3 \times 6}

Multiply the numbers

⇒\sf{5 - 18}

Calculate

⇒\sf{ - 13}

Hope I helped!

Best regards!!

7 0
3 years ago
Read 2 more answers
Work out (1.2 x 104 ) 2.5 x 103<br>Give<br>your answer in standard form.​
ExtremeBDS [4]

Answer:

32136

Step-by-step explanation:

it is basically (1.2*104 )*2.5*103

4 0
3 years ago
Read 2 more answers
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