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tester [92]
3 years ago
11

Find the value of this expression if x = -7 and y = -2. ху 9

Mathematics
1 answer:
Butoxors [25]3 years ago
5 0

Given,

x =  - 7

y =  - 2

\frac{xy}{9}  =  \frac{( - 7) ( - 2)}{9}  =  \frac{14}{9}

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Write an equation in slope-intercept form of the line with the given slope m and y-intercept b.
Paul [167]

Answer:

y=-4x+7/2

Step-by-step explanation:

slope-intercept form follows the following format:

y=mx+b

simply replace m with -4 and b with 7/2

7 0
3 years ago
For which acute angle are the sine of the angle and cosine of the angle equal? 30º 45º 60º 75º
Damm [24]
Hello

sin ..... | 0° |30°|45°|60°|90°|
...........| 0...| 1..| 2..|  3..| 4..|  write numbers
...........| 0...| 1..|√2.| √3 | 2..| take root square
...........| 0...|1/2|√2/2|√3/2|1| divide by 2
...........| 0...|1/2|√2/2|√3/2|1| .....
cos.....| 90°|60°|45°|30°| 0°|

sin (75°)
=sin(30°+45°)=sin 30°*cos 45° +cos 30°*sin 45°
....................  =1/2*√2/2            +  √3/2*√2/2
....................   = √2(1+√3)/4

cos 75°
=cos(30°+45°)=cos 30°*cos 45°-sin 30°*cos 45°
=√3/2*√2/2-1/2*√2/2
=√6/4-√2/4=√2/4*(√3 -1 )

5 0
3 years ago
A manufacturer has fixed costs of $16,000 per month and can produce w widgets at a cost of 0.1w^(2) + 20w. How many widgets shou
musickatia [10]
Consider c as the cost of the widget so that our given equation is
c = 0.1w^2 + 20w
Take the derivate of the equation.
d/dt (c = 0.1w^2 + 20w)
dc/dt = 0.2w + 20
Given dc/dt = $16000 per month, the number of widgets would contain:
16000 = 0.2w + 20
-0.2w = 20 - 16000
-0.2w = -15980
w = 79900 widgets
5 0
3 years ago
The solution of a A + B > 12 is a > -3. What is the value of b
IRINA_888 [86]
Can you take a picture
3 0
3 years ago
What is the value of p ?
VLD [36.1K]

Answer:

p = 35

Step-by-step explanation:

180 - 125 = 55

180 - 90 = 90

55 + 90 = 145

180 - 145 = 35

p = 35

6 0
3 years ago
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