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Rashid [163]
3 years ago
9

Multiply and show all steps please!!

Mathematics
2 answers:
Mazyrski [523]3 years ago
5 0

the answer is 80 take the positive and negative and use the sign change rule

garik1379 [7]3 years ago
4 0

Answer:

50

Step-by-step explanation:

First, find the square roots.

\sqrt{-16} =4i

\sqrt{-64} =8i

Remember: i stands for \sqrt{-1}

Then use the FOIL method to multiply.

(3+4i)(6-8i)

18-24i+24i-32i²

i²= -1, so :

18+32

50

I have no idea what the other person did, but its wrong.

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The actual length is 14.105
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3 years ago
A line with a slope of 2 passes through the point (9, 10). What is its equation in slope-intercept
defon

Answer:

y=2x-8

Step-by-step explanation:

Hi there!

We want are given a line with a slope of 2, that passes through the point (9, 10)

We want to find the equation of this line in slope-intercept form

Slope-intercept form can be written as y=mx+b, where m is the slope and b is the y intercept

As we are already given the slope, we can immediately plug it in as m in the formula.

y=2x+b

Now we need to find b, which is the value of the y intercept

As the equation passes through the point (9, 10), it is a solution to the equation, meaning that if we plug it into the equation of the line, it will create a true statement.

So we can use its values of x and y to help us solve for b.
Substitute 9 as x and 10 as y in the equation.

10=2(9) + b

multiply

10=18+b

Subtract 18 from both sides to isolate b on one side

-8=b
Substitute -8 as b into the equation

y=2x-8
Hope this helps!

If you would like additional problems to practice, here are two of them, both with explanations (n.b., the solution to the first link included uses a different method from the one in this answer.)
brainly.com/question/18112053
brainly.com/question/25508767

7 0
3 years ago
What is the difference in the account balances shown below? Behrooz: (-$21.00) Cody: $3.00
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Answer:

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Step-by-step explanation:

-21.00/3.00

4 0
3 years ago
What is the slope intercept form of y =8x + 4
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Looks like it's already in slope-intercept form.
slope-intercept form: y = mx + b
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Which of the following are examples of Structuring?
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Answer:all of them

Step-by-step explanation:

I just took the test

7 0
3 years ago
Read 2 more answers
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