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krok68 [10]
3 years ago
10

(-9) ÷(-2)=? Please help​

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
8 0

Answer:

4.5

Step-by-step explanation:

Andru [333]3 years ago
5 0

Answer:

(-9) ÷(-2)=4.5

Step-by-step explanation:

type it in a calculator !!

you will get the result.

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Help 10 POINTS MATH IS NOT MY STRONG SUIT
Masja [62]

Answer:

infinite number of solutions

Step-by-step explanation:

Work with the second equation.  Subtract 8x from both sides.

- 4y + 8x - 8x = -8x - 12                   Collect like terms.

-4y = - 8x - 12                                   Divide by - 4

-4y/-4 = - 8x/-4 - 12/-4

y = 2x + 3

That is exactly the same line as the first given.  There is an infinite number of solutions.

6 0
3 years ago
What is the median number for the numbers 4, 8, 10, 5, 9
AVprozaik [17]


the answer is 10.

place your index fingers on the 4 & the 9 then move in toward the 10 the number in the middle is 10.

4 0
3 years ago
Ken is driving home from college the trip is 245 miles if he drives and average of 70 mph how many hours will it take him to get
Vedmedyk [2.9K]

Answer:

3 hour and  30 minutes

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
Sin(x+pi/4)-sin(x-pi/4)=1 solve the equation
evablogger [386]
Sin(α+β)=sin(α)cos(β)+cos(α)sin(β)
sin(α-β)=sin(α)cos(β)-cos(α)sin(β)


sin(x+ \frac{ \pi }{4} )=sin(x)cos\frac{ \pi }{4} +cos(x)sin\frac{ \pi }{4}  \\ sin(x- \frac{ \pi }{4} )=sin(x)cos\frac{ \pi }{4} -cos(x)sin\frac{ \pi }{4}  \\ \\   \\sin(x+ \frac{ \pi }{4} )-sin(x- \frac{ \pi }{4} ) =1 \\ sin(x)cos\frac{ \pi }{4} +cos(x)sin\frac{ \pi }{4}  -(sin(x)cos\frac{ \pi }{4} -cos(x)sin\frac{ \pi }{4}  )=1 \\  sin(x)cos\frac{ \pi }{4} +cos(x)sin\frac{ \pi }{4}  -sin(x)cos\frac{ \pi }{4} +cos(x)sin\frac{ \pi }{4}  =1 \\  cos(x)sin\frac{ \pi }{4} +cos(x)sin\frac{ \pi }{4}  =1 \\
2cos(x)sin\frac{ \pi }{4}  =1    \\ sin\frac{ \pi }{4} = \frac{ \sqrt{2} }{2}  \\ 2cos(x) \frac{ \sqrt{2} }{2}  =1 \\ 2 \cdot \frac{ \sqrt{2} }{2}cos(x)   =1 \\   \sqrt{2} cos(x)=1 \\
cos(x)= \frac{1}{ \sqrt{2} }  \\ x=\pm arccos \frac{1}{ \sqrt{2} }+2 \pi k , k \in Z \\ x=\pm \frac{ \pi }{4} +2 \pi k , k \in Z
6 0
3 years ago
$42 15% Discount = ?
Maurinko [17]
First, you multiply 42 by .15 which you get $6.30
Then, you subtract $42 by $6.30 which you get the answer: $35.70
3 0
3 years ago
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