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3 years ago

Evaluate the expression 2x -x2for x =5

Mathematics

1 answer:

Bond [772]3 years ago

3 0

Answer:

Step-by-step explanation:

First, you need to plug in the values for x. Here, we know that x = 5. So, when we plug it in we get 2^5 - 5^2. When we simplify, we then get 32 - 25. Thus, 32 - 25 = 7.

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Using long division to find the quotient and remainder 4x^4+2x^2-2 divided by x^2+2

emmasim [6.3K]

4x² -6
__________________
x²+2 l 4x^4 +2x² -2
l 4x^4 +8x²
--------------------
-6x² -2
-6x² -12
---------------
10

so the answer is $(4x^2-6) \frac{10}{x^2+2}$

8 0

4 years ago

2^x-1=128 show work pls! thank u :)

hichkok12 [17]

Hello from MrBillDoesMath!

Answer:

Take you pick below! (either x 8 or x = 7.01, approx, depending how the question is interpreted)

Discussion:

Interpretation 1

If the question is 2^(x -1) = 128, then as 2^7 = 128,

x-1 = 7 so x = 8

Interpretation 2

If the question is (2^x -1) = 128, then..

2^x = 128 + 1 = 129 =>

log(2^x) = log(129) =>

xlog(2) = log(129) =>

x = log (129) / log2 = 7.01

Regards,

MrB

4 0

3 years ago

A = x. b What is b in the terms of a and x

liq [111]

Step-by-step explanation:

i think its

b=x

a

hope it help u...

8 0

3 years ago

If x = 15 cm, y = 36 cm, and z = 39 cm, what is the surface area of the geometric shape formed by this net? A. 1,890 cm2 B. 2,88

zheka24 [161]

Answer:

I belive it’s C

Step-by-step explanation:

I don’t know if it’s correct tell me if I’m wrong

6 0

2 years ago

20 points!! please help me with this :)

babymother [125]

Answer:

The third graph

Step-by-step explanation:

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5 0

3 years ago