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Arisa [49]
3 years ago
6

HELP 18 POINTS PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics
1 answer:
Montano1993 [528]3 years ago
3 0

Answer:

The second one if that how to answer.

Step-by-step explanation:

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What is 4n - 3 = -2n + 9 if n = 2
Schach [20]
4n-3=5=-2n+9=5 if n=2
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4 years ago
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Evaluate the expression below.\<br> (4.4+7.6)x-(24/12)x
DedPeter [7]

Answer:

10x

Step-by-step explanation:

4 0
3 years ago
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I'm desperate. I need all of them answered
notsponge [240]

a. A' means the complement with respect to Z? If so, then

To know A' you need to write all the elements in Z that are not in A.

A'= \{ u, v, w, x, y, z\}

b. All the subsets of B, is knowed as P(B),

P(B) = \{ \emptyset, \{w\}, \{x\}, \{y\}, \{w,x\}, \{w,y\}, \{x,y\}, B \}

c. A \cup B = \{a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t, w,x,y \} (Add to A the elements of B, or equivalently add to B the elements of A)

d. A \cap B  express informally speaking the elements that have in common, but there is no element in common, so

A \cap B = \emptyset

8 0
3 years ago
On Monday, Ray had $153.75 in his bank account. On Tuesday, he withdrew $71.00 from his account. After depositing #292.50 on Wed
Natasha_Volkova [10]

Answer:

$375.25

Step-by-step explanation:

===========================================

Withdrew- taking out money (-)

Deposit- putting in money (+)

===========================================

Ray started off with 153.75. He withdraws (-) 71.

153.75-71=82.75

Then he deposits (+) 292.5.

82.75+292.5=375.25

That's your answer!

I hope this helps ❤

8 0
3 years ago
Which factors can be multiplied together to make the trinomial 5x^2+8x-4
Kitty [74]

Answer:

Step-by-step explanation:

hello :

5x²+8x-4  quadratic expression when : a = 5  and  b=8  and  c= -4

∆ = b²-4ac        ∆ = 8²-4(5)(-4) = 64 +80 = 144 = 12²

X1 = ( -b -√∆)/2a       X1 = (-8-12)/10 = -20/10= -2

X2 =(-b+√∆)/2a       X2 = (-8+12)/10 = 4/10 = 2/5

us factorisation : a(X-X1)(X-X2)

5x²+8x-4= 5(x+2)(x-2/5) = (x+2)(5x-2)

you can verify ;  (x+2)(5x-2) = 5x²-2x+10x-4 = 5x²+8x-4

4 0
3 years ago
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