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blsea [12.9K]
3 years ago
9

Is the line y = 3x – 7 parallel or perpendicular to 3x + 9y = 9? Explain your answer.

Mathematics
1 answer:
Mama L [17]3 years ago
6 0

Answer:

perpendicular

Step-by-step explanation:

The slope of y = 3x - 7 is 3.

3x + 9y = 9 → 9y = -3x + 9 → y = -1/3 x + 1 so its slope is -1/3.

This means that they are perpendicular because the product of their slopes is -1.

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4 years ago
A triangle has side lengths of 7 in., 9 in., and 11 in. Determine whether this is a right triangle and why.
Harlamova29_29 [7]

Answer:

Not a right triangle.  See below for my reasoning.


Step-by-step explanation:

If this is a right triangle, then the sum of the squares of the two shorter sides will equal the square of the longest side:  7^2 + 9^2 = 11^2 => 49 + 81 = 121   But this is false.

8 0
3 years ago
i will give you brainliest and thanks and 5 star on all of my accounts on brainliest if its correct rip my points i have 9 now :
elena-14-01-66 [18.8K]

Answer:

A) answer c ; B) X+3.7=15.3 ; C) 15.3 - 3.7 = 11.6 ---> 11.6+3.7=15.3

Step-by-step explanation:

Solution for A: First you have to look for the line underneath the bar says 15.3 as this will represent the total amount of liters in the bucket altogether. This would be bar c since we also know that we have 3.7 liters added but are missing the amount that was previously inside the bucket.

Solution for B: Let X resemble the unknown amount of water. To solve B, we need to write an equation. We know that there was already an amount of water in the bucket prior to us pouring more in so X is our first addend. We then added 3.7 liters of water to the unknown amount so that is our next addend giving you X+3.7=15.3

Solution for C: Now that we know our equation, we do the inverse operation (subtraction) in order to figure out the missing amount of water. This means we do

15.3 - 3.7 = 11.6

4 0
3 years ago
Find the surface area of the regular pyramid. round to the nearest tenth if necessary.
Morgarella [4.7K]

the answer is a

hope this helps

3 0
3 years ago
............Find .....X......
LiRa [457]

Answer:

x=50

Step-by-step explanation:

(x-10)+x+90=180

2x-10+90=180

2x+80=180

2x=100

<u><em>x=50</em></u>

4 0
3 years ago
Read 2 more answers
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