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3 years ago

Math 2(8x -4) = 32 show work

Mathematics

2 answers:

Y_Kistochka [10]3 years ago

8 0

8x - 4 = 32/2
8x - 4 = 16
8x = 16 + 4
8x = 20
x = 20/8
x = 5/2

Umnica [9.8K]3 years ago

4 0

2(8x - 4) = 32 distribute through parenthesis
16x - 8 =32 add 8 on both sides to isolate x
16x = 40 divide by 16 on both sides to isolate x
x= 40/16 simplify, Divide 40 by 16
x = 2.5 this is your final answer, I hope it helps!

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What percent of 3/5 is 9/10 ? A. 1.5% B. 7% C. 15% D. 67% E. 150%

maw [93]

.67%
hope this helps.
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3 years ago

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(3-4i)(6i+7)-(2-3i)

Sergeu [11.5K]

Answer:

43-7i

Step-by-step explanation:

We are given the expression:

$\displaystyle \large{(3 - 4i)(6i + 7) - (2 - 3i)}$

First, expand 3-4i in 6i+7. To expand binomial with binomial, first we expand 3 in 6i+7 then expand -4i in 6i+7.

$\displaystyle \large{[(3 \cdot 6i) + (3 \cdot 7) + ( - 4i \cdot 6i) + ( - 4i \cdot 7)]- (2 - 3i)} \\ \displaystyle \large{[18i + 21 - 24 {i}^{2} - 28i]- (2 - 3i)}$

Now combine like terms.

$\displaystyle \large{[ - 10i+ 21 - 24 {i}^{2} ]- (2 - 3i)}$

Imaginary Unit

$\displaystyle \large{i = \sqrt{ - 1} } \\ \displaystyle \large{ {i}^{2} = - 1 }$

Therefore:-

$\displaystyle \large{[ - 10i+ 21 - 24 ( - 1) ]- (2 - 3i)} \\ \displaystyle \large{[ - 10i+ 21 + 24]- (2 - 3i)} \\ \displaystyle \large{[ - 10i+ 45]- (2 - 3i)}$

Then expand negative sign in 2-3i; remember that negative times negative is positive and negative times positive is negative.

$\displaystyle \large{- 10i+ 45 - (2 - 3i)} \\ \displaystyle \large{- 10i+ 45 - 2 + 3i}$

Combine like terms.

$\displaystyle \large{43 - 7i}$

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2 years ago

Write in standard notation. 6.9 × 10^-3

Dafna1 [17]

0.0069

Step-by-step explanation:

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3 years ago

[ Will give brainliest! ]

algol13

The answer is C
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Hope this helps :)

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3 years ago

4x+5=3x+6 Help please

ohaa [14]

Answer:

x=1

just use google mate

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3 years ago

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