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3 years ago

Find the sum of the following without actually adding: 1+3+5+7+9+11+13+15

Mathematics

2 answers:

-Dominant- [34]3 years ago

7 0

Answer:

Step-by-step explanation:

The following numbers are successive odd numbers.

The sum of successive odd numbers (starting from 1) is always the square of number of terms you are adding.

Hear there are 8 terms. Square of 8 is 64.

Hence the sum of this numbers is 64.

I am Lyosha [343]3 years ago

6 0

use this formula Sn=n/2[2a+(n-1)d]

here,d=a2-a1 and n= no. Of terms

Step-by-step explanation:

S8=8/2[2(1)+(8-1)2]

S8=64

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Find the value of Z in the following equation 8Z =64

a_sh-v [17]

8z = 64
divide both sides with 8

8z ÷8 = 64÷8
therefore,
z = 8.

7 0

3 years ago

Read 2 more answers

A line passes through the point (8,3) and has a slope of 3/4 write the equation in slope intercept form

denpristay [2]

The slope intercept formula would be: y=3/4x-3. Hope this helps!

8 0

3 years ago

What are the following of this function y = 4sin (2( x - <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%5Cpi%20%7D%7B4%7D" id="Te

Andrei [34K]

Answer:

See below...

Step-by-step explanation:

For a function whose formula is in this pattern:

$y=A\sin\left(B(x-C)\right)$

Amplitude: $|A|$

Period: $\frac{2\pi}{B}$

Phase Shift: C

In this question, $A=4,\,B=2,\,C=\frac{3\pi}{4}$

Amplitude: 4

Period: $\frac{2\pi}{2}=\pi$

Phase Shift: $\frac{3\pi}{4}$

There is no vertical shift, so the midline is the x-axis whose equation is y = 0.

Also, because there is no vertical shift, the maximum is 4 and the minimum is -4.

The graph is attached.

6 0

3 years ago

Can someone help me plz?

Nikitich [7]

Answer:

275 non spectators

Step-by-step explanation:

1. Subtract

42,500 - 31,750 - 10,475 =

275

2. Get answer

275 non-spectators

7 0

3 years ago

B) 2x² - 4x + 3 = 0 a) x² + 3x – 10 = 0

kozerog [31]

Answer:

a. x = 2 , x = -5

b. no real roots

Step-by-step explanation:

a. x² + 3x – 10

= x² - 2x + 5x - 10

= x (x²/x - 2x/x) + 5 (5x/5 - 2*5/5)

= (x - 2) (x + 5)

x - 2 = 0 x + 5 = 0

+ 2 +2 -5 -5

-------------- ---------------

x = 2 x = -5

x = 2 , x = -5

b. 2x² - 4x + 3

This can't be solved because the equation has no real roots, and also the discriminant is negative.

3 0

3 years ago