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S_A_V [24]
3 years ago
8

What’s the answer???(SOMEONE PLEASE HELP)

Mathematics
2 answers:
Pie3 years ago
6 0

Answer:

= 5

Step-by-step explanation:

i = \sqrt{-1}

-4 - 9*\sqrt{-1}

-4 + 9 * \sqrt{1}

-4 + 9 * 1

-4 + 9

= 5



kakasveta [241]3 years ago
5 0

Answer:

\sqrt{97}

Step-by-step explanation:

|a + bi| = \sqrt{a^2 + b^2}

|-4 - 9i| = \sqrt{(-4)^2 + (-9)^2}

|-4 - 9i| = \sqrt{16 + 81}

|-4 - 9i| = \sqrt{97}

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2 years ago
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Solve. 3 1/4 - 1 5/8
erik [133]

Step 1. Convert 3 1/4 to an improper fraction.

3 * 4 + 1/4 - 1 5/8

Step 2. Simplify 3 * 4 to 12

12 + 1/4 - 1 5/8

Step 3. Simplify 12 + 1 to 13

13/4 - 1 5/8

Step 4. Convert 1 5/8 to an improper fraction.

13/4 - 1 * 8 + 5/8

Step 5. Simplify 1 * 8 to 8

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Step 6. Simplify 8 + 5 to 13

13/4 - 13/8

Step 7. Find the Least Common Denominator (LCD) of 13/4, 13/8

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Step 8. Make the denominators the same as the LCD

13 * 2/ 4 * 2 - 13/8

Step 9. Simplify. Denominators are now the same

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Step 10. Join the denominators

26 - 13/8

Step 11. Simplify

13/8

Step 12. Convert to a mixed fraction

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6 0
3 years ago
Read 2 more answers
I need help <br>I need help fast​
german

Answer:

<STP=105°

Step-by-step explanation:

two interior angles equal one opposite exterior angle therefore

7x+6+7x+1=15x

group like terms

6+1=15x-7-7

7=15x-14x

7=x

for 15x

15 will multiply 7 and that is 105

6 0
3 years ago
Solve for y. 6x-4y=-16
musickatia [10]

y =  \frac{6}{4} x  + 4



Explanation:
1. you subtract 6x to get 4y alone. which will get you -4y=-6x-16
2. then you divide everything by -4 to get y completely alone.
This will get you the answer of y=6/4y+4
7 0
3 years ago
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