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d1i1m1o1n [39]
3 years ago
13

I NEED TO KNOW THIS Q

Mathematics
2 answers:
Nikolay [14]3 years ago
6 0

See picture for explanation.

IRISSAK [1]3 years ago
3 0
To find where they intersect you need to find where they equal each other. Since you already know what y equals in terms of x from the blue equation you can plug that into the red equation to solve for x
x + 4(2x - 6) = 12 \\ x + 8x - 24 = 12 \\ 9x = 36 \\ x = 4
Now that we know what x is equal to we can plug it into the blue equation to solve for what y is equal to
y = 2(4) - 6 \\ y = 8 - 6 \\ y = 2
The place where the two lines intersect is at the coordinate (4,2)
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Select the correct answer. Twenty students in Class A and 20 students in Class B were asked how many hours they took to prepare
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Answer:

B: The mean study time of students in Class B is less than students in Class A.

Step-by-step explanation:

To find out why answer B is the right answer, I will give you facts from each option.

Option A is false. <em>The mean study time in Class A is 4.8. Meanwhile in Class B it is 4. For Class A, sum up the 20 study times which is 96 and divide them by 20, you will get 4.8 hours of mean study time. For Class B, the sum of the 20 study times is 80, which divided by 20 will be 4. </em>

Option B is True. <em>See previous explanation. </em>

Option C is False. <em>The median study time in Class B is 4. The median study time in Class A is 4.8, </em>

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Option E is False: <em>The mean and median study time of these classes is different.</em>

6 0
3 years ago
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David wants to hang a mirror in his room. The mirror and frame must have an area of 8 square feet. The mirror is 2 feet wide and
Agata [3.3K]
The correct quadratic equation;
x2+7x-2=0

Working
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Taking 8 to the Right hand side, we have:
x2+5x-2 =0 
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3 years ago
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