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adelina 88 [10]
2 years ago
14

Math Is Hard For Me .

Mathematics
1 answer:
AleksandrR [38]2 years ago
5 0
Mark is hard for me too
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What is the contra positive of the statement if 9x=27, then x=3
Karo-lina-s [1.5K]

Answer:

If 9x is not =27, then x is not =3

Step-by-step explanation:

Going out on a limb here, please ignore if I'm missing it:

If 9x is not =27, then x is not =3

(I can't type the equal sign with a slash through it.)

7 0
3 years ago
What is the exact value of tan (StartFraction 5 pi Over 8 EndFraction)
melisa1 [442]

9514 1404 393

Answer:

  (d)  -√((2+√2)/(2-√2))

Step-by-step explanation:

5π/8 is a 2nd-quadrant angle whose reference angle is greater than π/4. This means the tangent is negative with a magnitude greater than 1. The only reasonable choice is ...

  \displaystyle -\sqrt{\frac{2+\sqrt{2}}{2-\sqrt{2}}}

_____

<em>Additional comment</em>

This simplifies to -(1+√2). Your calculator can verify the choice for you.

4 0
2 years ago
Read 2 more answers
How do u do 2 over 3 =A over 60 PLZ NO LINKS THANKS
Ivanshal [37]

Hey there!

2/3 = a/30

First: you have to CROSS MULTIPLY the given numbers

2(30) = 3(a)

2(30) = 60

3(a) = 3a

New EQUATION: 3a = 60

Second: DIVIDE 3 to BOTH SIDES

3a/3 = 60/3

CANCEL out: 3/3 because that gives you 1

KEEP: 60/3 because that helps you solve for your a-value

60/3 = a

60/3 = 20

Therefore, your answer is: a = 20

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

6 0
2 years ago
In the morning, the number of ducks at the reservoir was 80. By noon, the reservoir had 135 ducks. What was the percent of chang
Mekhanik [1.2K]

Answer:

60 percent

Step-by-step explanation:

number of ducks in morning=80

ducks in after noon=135

for percentage

80/135=0.5925=0.60

0.60*100=60 percent

4 0
3 years ago
Harley read 5 books in january, 8 books in february, 4 books in march and 7 books in april. what is the average number of books
Andrej [43]

Answer:

B: 6

Step-by-step explanation:

Find the mean:

5+8+4+7= 24

24/4=6

7 0
2 years ago
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