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SVEN [57.7K]
3 years ago
10

Pre cal/cal master needed

Mathematics
1 answer:
weqwewe [10]3 years ago
5 0
Take x-2 and insert it into 2x^2 + 3x-2 where the x is located 
2x^2 + 3x-2
2(x-2)^2 + 3(x-2)-2

Now work out 2(x-2)^2 + 3(x-2)-2 also follow PEMDAS
2(x-2)^2 + 3(x-2)-2 
Since (x-2)^2 is an Exponent, lets work with that first and expand (x-2)^2.
(x-2)^2
(x -2)(x-2)
x^2 -4x + 4
Now Multiply that by 2 because we have that in 2(x-2)^2
(x-2)^2  =  x^2 -4x + 4
2(x-2)^2  =  2(x^2 -4x + 4)
2(x^2 -4x + 4) = 2x^2 - 8x + 8
2x^2 - 8x + 8

Now that 2(x-2)^2 is done lets move on to 3(x-2).

Use the distributive property and distribute the 3
3(x-2) = 3x - 6

All that is left is the -2 

Now lets put it all together 
2(x-2)^2 + 3(x-2)-2

2x^2 - 8x + 8 + 3x - 6 - 2

Now combine all our like terms 
2x^2 - 8x + 8 + 3x - 6 - 2
Combine:  2x^2      =  2x^2 
Combine: -8x + 3x  =  -5x
Combine:  8 - 6 - 2 =   0

So all we have left is
2x^2 - 5x





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You but a spinning top for younger cousin the spinning top is a square pyramid the side length of the base of the spinning top i
dezoksy [38]

Answer:

10,922\frac{2}{3}\ mm^{3}

Step-by-step explanation:

we know that

The volume of a square pyramid is equal to

V=\frac{1}{3}b^{2}h

where

b is the length side of the base

h is the height of the pyramid

In this problem we have

b=32\ mm

h=32\ mm

substitute

V=\frac{1}{3}(32^{2})(32)=(32,768/3)\ mm^{3}

Convert to mixed number

\frac{32,768}{3}=\frac{32,766}{3} +\frac{2}{3} =10,922\frac{2}{3}\ mm^{3}

3 0
3 years ago
8x9-2-3 = 32<br> Where do the parentheses go
Sergio039 [100]

Answer:

8 * (9 - 2 -3) = 32

Step-by-step explanation:

8 * (9 - 2 - 3)

8 * (4)

32

7 0
3 years ago
Read 2 more answers
A) 2(5x – 3) = 24<br> b)<br> 5(2x + 1) = 50
nadezda [96]

Answer:

a) x=3

b) x=4.5

Step-by-step explanation:

2(5x – 3) = 24

10x-6=24

10x=30

x=3

5(2x + 1) = 50

10x+5=50

10x=45

x=4.5

8 0
3 years ago
What are the exact values of sin(2π3radians) and cos(2π3radians)
topjm [15]
We know that
2π/3 radians-------> convert to degrees-----> 2*180/3---> 120°
120°=90°+30°

Part a) Find <span>sin(2π/3)
</span>sin(2π/3)=sin (90°+30°)
we know that
sin (A+B)=sin A*cos B+cos A*sin B
so
sin (90°+30°)=sin 90*cos 30+cos 90*sin 30
sin 90=1
cos 30=√3/2
cos 90=0
sin 30=1/2
sin (90°+30°)=1*√3/2+0*1/2-----> √3/2

the answer part a) is
sin(2π/3)=√3/2

Part b) Find cos (2π/3)
cos (2π/3)=cos (90°+30°)
we know that
cos (A+B)=cos A*cos B-sin A*sin B
so
cos (90°+30°)=cos 90*cos 30-sin 90*sin 30
sin 90=1
cos 30=√3/2
cos 90=0
sin 30=1/2
cos (90°+30°)=0*√3/2-1*1/2----> -1/2

the answer part b) is
cos (2π/3)=-1/2


4 0
3 years ago
HEEEEEEEEELLLLLLLLLLLLPPPPPPPPPPP ASAP
VLD [36.1K]

Answer:

I'm not sure how to help-

Step-by-step explanation:

What would you need help with? C:

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3 years ago
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