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luda_lava [24]
3 years ago
7

What is the value of 9x^2 + 13x – 15, if x = 2

Mathematics
2 answers:
Harman [31]3 years ago
8 0

Answer:

9(2)×2+13(2)-15

18×2+26-15

36+11

47 is your answer ☺️☺️☺️

Paladinen [302]3 years ago
3 0

Step-by-step explanation:

Given,

9 {x}^{2}  + 13x - 15

and

x = 2

Substitute x = 2 into expression.

9 {x}^{2}  + 13x - 15 = 9( {2}^{2} ) + 13(2) - 15 \\  = 9(4) + 26 - 15 \\  = 36 + 26 - 15 \\  = 62 - 15 \\  = 47

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Mrac [35]
Use ax^2 + bx + c = 0

ac = -8
b = 2

The factors are 4 and -2.
Plug them into the equation:

x^2 + 4x - 2x - 8

Then factorise it:

x ( x + 4) - 2 (x + 4)

so m = 4

(x + 4)^2

4 0
3 years ago
1. Given the points (-2,4) and (4, -2), find the midpoint between these points.
Naddika [18.5K]

Answer:

(1,1)

Step-by-step explanation:

M=(x1+x2 / 2 , y1+y2 / 2)

M=(-2+4 / 2 , 4+ -2 / 2)

M=(2 / 2 , 2 / 2)

M=(1,1)

5 0
3 years ago
PLEASE HELP I REALLY NEED THE ANSWER AND I WOULD APPRECIATE IT(NO SPAMMING) I WANT TO FIND THE PERIMETER NOT THE AREA!!!
Anna [14]
The perimeter would be 20m:)
7 0
2 years ago
Read 2 more answers
Maria looked at the architectural plan of a room with four walls in which the walls meet each other at right angles. The length
babymother [125]
Using the Pythagorean theorm, 
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13^2 +13^2 = c^2
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4 0
3 years ago
?? ?? ???????????????
NeTakaya
Hi

The answer is : 14s^133t^5u^144v^2


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