3 years ago

Formar for solving an arithmetic progression

Mathematics

2 answers:

grin007 [14]3 years ago

6 0

Answer:

Step-by-step explanation: a + ( n- 1 )d

where,

'a' means first term

'n' means number

'd' means common difference

mixas84 [53]3 years ago

3 0

Step-by-step explanation:

$a_{n} = a + (n - 1) \times d$

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3x sqaured-2x+3 (x=-4)

Effectus [21]

Answer:

<h2> The answer is X= -4 </h2>

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3 years ago

Find the estimates of x^2-x-2=3

Julli [10]

Answer:

$x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-x-2=3\\x^2-x-5=0$

Roots of the quadratic equation $ax^2+bx+c=0$ are

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

So, for the given equation roots are

$x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

5 0

2 years ago

James has just sold his motorbike for £1,890. He bought the motorbike for £2,700. What was his percentage loss? %

Usimov [2.4K]

£2.700 - £1890 = £810

<span>£ (money) -------------- percentage (%)
</span>2.700 -------------------- 100
810 ----------------------- x

2700*x = 810*100
2700x = 81000
$x = \frac{81000}{2700}$
$\boxed{x = 30}$

Answer:
Percentage loss = 30%

6 0

2 years ago

(8w)^2 without parentheses

Nataly [62]

Answer:

I believe the answer would be 64w2.

Step-by-step explanation:

8 squared is 8 x 8, which equals 64, and then w squared is just w2, since we don't know what it is. Put them together, and the answer is 64w2.

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3 years ago

What is the circumference of a circle<br> with a diameter of 4?<br> Type in your response.

Marta_Voda [28]

Answer:

12.57

Step-by-step explanation:

hope this helps

5 0

2 years ago

Read 2 more answers

Formar for solving an arithmetic progression ​

Formar for solving an arithmetic progression