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balandron [24]
3 years ago
11

Evaluate when x = -3 and y= -1: x-xy=

Mathematics
2 answers:
LenKa [72]3 years ago
5 0
-3-(-3)(-1)= 0, so 0 is the solution
otez555 [7]3 years ago
3 0
-3- -3 x -1
-3-3 = -6
Answer : -6 ?
Hopefully I helped :)
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What is the equation of the line that has a y-intercept of -7 and is perpendicular to the line represented by the equation below
kramer
8x + 7y = 19
- 8x
7y = 19 - 8x
÷ 7
y = 2 5/7 - 8/7x
So if that line is perpendicular to the line you're looking for, then the gradient (x value/slope) is the negative reciprocal to the gradient you're looking for, which would then be 7/8. You are told it has a y intercept of -7, so your final answer is:
y = -7/8x - 7
Hope this helps!
7 0
3 years ago
An ecological group suspects tuna are consuming dangerous levels of copper in a region of the world. Dangerous levels of copper
Mademuasel [1]

Answer:

Step-by-step explanation:

A) From the stem-leaf plot, we see that out of 21 tunas, 5 have dangerous levels of copper since the levels go beyond 5.7 parts per million. The required proportion is 5/21=0.2381

B) Given the sample mean is {x}=4.77, sample standard deviation s=1.16 and the sample size is n=21.

Since the population standard deviation is not known, we use t-distribution.

So the 98% CI for mean is

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We are sure with 98% confidence the true copper level (in parts per million) lies in the interval (4.13, 5.41)

8 0
3 years ago
Q. Find the sum of interior angle of the given polygon. Work out the measure of the missing angle. *
SpyIntel [72]

Step-by-step explanation:

Number of sides of the given polygon, n =5

Sum of interior angles =( n-2)180°

=( 5 - 2)180°

= 3*180°

= 540°

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= 540°- 460°

= 80°

4 0
3 years ago
Which of the following is a good cardio-respiratory workout option
inysia [295]

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Hence, option D - all of the above is the answer.

8 0
3 years ago
The difference between two numbers is 20. their sum is 14.find the numbers
sladkih [1.3K]
Let the two numbers be x and y. The sum of x and y is 14 and the difference is 20. We can write a system of equations and solve:

x-y=20 \\
x+y=14 \\
2x=34 \\
x=17

Then substitute x back into one of the equations to find y:

x+y=14 \\
17+y=14 \\
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So the two numbers are 17 and -3

8 0
3 years ago
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