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USPshnik [31]
3 years ago
7

19–(-13–7)+(6–8) Write your answer in the form a+bi

Mathematics
1 answer:
vazorg [7]3 years ago
3 0

Answer:

37

Step-by-step explanation:

19−(−13−7)+6−8

=19−(−20)+6−8

=39+6−8

=39+−2

=37

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Tan^4x-sec^4x=1-2 sec^2(x)<br> verify
olga nikolaevna [1]
Tan⁴x - sec⁴x = 1 - 2sec²x

tan²x = sec²x - 1

tan⁴x - sec⁴x = 1 - 2sec²x
(tan²x)² - sec⁴x = 1 - 2sec²x
(sec²x - 1)² - sec⁴x = 1 - 2sec²x

(sec²x)² - 2 * sec²x + 1 - sec⁴x = 1 - 2sec²x
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sec⁴x can be cancelled:
- 2 sec²x + 1 = 1 - 2sec²x

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6 0
3 years ago
Solve for u in the proportion.<br> 40/15 = u/6<br> URGENT
sammy [17]

Answer:

16

Step-by-step explanation:

40x 6 =u x 15

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U = 240÷15

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4 0
4 years ago
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PLEASE HELP IMPORTANT!!!!!!!!!!!!!
Sladkaya [172]

Answer:

D Is the correct answer.

Simple math. (:

7 0
3 years ago
david ran on a straight track. every time he ran 480m, he took a break. After 2 breaks, he still had to run 120 m to complete th
kipiarov [429]

Answer:

The distance of the playground is 540m

Step-by-step explanation:

Here, we are interested in calculating the length of the playground given the information in the question.

Where to attack the question from is the segment that states that he took a break after 480m and also had 2 breaks. Thus, the distance traveled would be 480 * 2 = 960 m

Now, to find the length of the track, we add the distance covered plus the distance uncovered. Mathematically that would be 960m + 120m = 1,080m

In the last part of the question, we are told that the track is twice as long as the playground. This means that the length of the playground or the distance of the playground is 1080/2 = 540 m

4 0
4 years ago
Combine and simplify the following radical expression.
guajiro [1.7K]

Answer:

<h2>24 \sqrt{5}</h2>

Step-by-step explanation:

2 \sqrt{20}  + 8 \sqrt{45}  -  \sqrt{80}

= 2 \sqrt{2 \times 2 \times 5}   + 8 \sqrt{3 \times 3 \times 5}  -  \sqrt{2 \times 2 \times 2 \times 2 \times 5}

= 2(2 \sqrt{5} ) + 8(3 \sqrt{5} ) - (4 \sqrt{5} )

= 4 \sqrt{5}  + 24 \sqrt{5}  - 4 \sqrt{5}

= 24 \sqrt{5} (ans)

3 0
3 years ago
Read 2 more answers
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