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andreyandreev [35.5K]
3 years ago
12

I need help guys or girls please help me and thank you

Mathematics
1 answer:
Fynjy0 [20]3 years ago
3 0
I'm not 100% sure but from what I learned, I think it's the last one.
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three numbers are in an arithmetic progression. Their sum is 3 and the sum of their squares is 11. what are the three numbers
Vlad [161]

The three numbers are 12, 18 and 24

Arithmetic progression

Let the 3 number in arithmetic progression be:

a-d, d, a+d ...

If their sum is 3, then;

a-d+d+a+d = 3

2a + d = 3 ........... 1

If the sum of their squares is 11, then;

(a-d)² + d² + (a+d)² = 11

a²-2ad+d²+d²+a²+2ad+d²  11

2a²+3d² = 11 ....... 2

Solving the equations simultaneously, d = 6 and a = 12

First-term = 12

second term = 18

Thirs term = 24

Hence the three numbers are 12, 18 and 24

Hope this helps you!!!!!! :D

5 0
2 years ago
Read 2 more answers
Passe os numeros a seguir para notação cientifica.
loris [4]

Answer:

ingles Hablas ingles?

5 0
3 years ago
the floor of a shed has an area of 96 square feet. the floor is in the shape of a rectangle whose length is 4 feet less than twi
Paul [167]
Alright in this one, you are going to need to factor. 
The width is x
The length is 2x-4
To find the area of a rectangle is L*W
so (2x-4)(x) when distributed is 2x^2 -4x

Then put that in the equation and you have:
2x^2 -4x = 96
2x^2 -4x -96 = 0  

2x^2+12x-16x-96=0
3x(x+4)-4(x+4)=0
(3x-4)=0
(x+4)=0
x=-4
<u>x=3/4</u>
Since length isn't negative
we will use <u>3/4 as x.
</u>
Width= 0.75 ft
Length= 1.5

3 0
3 years ago
You want to determine the use of a graphing calculator on a test. is it Experimental or Observational
bija089 [108]

experimental I think probably

5 0
2 years ago
One bulb of elephant garlic cost $2 . How many bulbs of elephant garlic can you buy for $14
SpyIntel [72]

Answer:

7

Step-by-step explanation:

Since 14 divided by 2 is 7, you can get 7 bulbs of elephant garlic.

Hope this helps.

6 0
3 years ago
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