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EleoNora [17]
3 years ago
8

One number added to twice another number is 13. Four times the first

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
6 0
Let's call the first number x, and the second number y. Putting what you have said into equation form:

x+2y=13
\\\\4x+2y=-2


Subtracting one equation from another gives:

x+2y=13 \\-(4x+2y=-2)

\\\\-3x=15
\\x=-5

If x = -5,

x+2y=13
\\(-5)+2y=13
\\2y=18
\\y=9

So the first number is -2, the second number is 9
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B

Step-by-step explanation:

Since A represents the number of AFC cars and N represents the number of NFC cards, and that Daryl has 160 total cards, then A+N = 160, the total number of cards. Furthermore, the number of AFC cards Daryl has is 8 more than 3 times the number of NFC cards, so A would be equal to 8 + 3N, or A = 3N + 8. The only system of equations with both of these correct equations is B.

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3 years ago
Please answer correctly !!!!!!!!!!! Will mark brainliest !!!!!!!!!!!
nikklg [1K]

Answer:

lower price = 3

higher price =11

Step-by-step explanation:

p(x) = -2(x-3) (x-11)

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Using the zero product property

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3 years ago
What is y=2x^2-12x+16 in vertex form
Natasha2012 [34]

Answer:

y = 2(x-3)^2 - 2

Step-by-step explanation:

y = 2x^2 - 12x + 16

y = 2(x^2 - 6x + 8)

y = 2(x^2 - 6x +8 +1 -1) you "complete the square" by bringing the last term (8) up to "half of the middle co-efficient squared". Middle co-efficient is -6, half is -3, squared is 9. To get from 8 to 9 you must add 1 (+1), but if you add 1 you must subtract 1 (-1) so that you don't change the overall value of inside the bracket


y = 2(x^2 - 6x +9) - 2 (bring the -1 outside of the brackets)

y = 2(x-3)^2 - 2

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3 years ago
Help ! Compare these two functions. Which has the greater rate of change?
ololo11 [35]

Answer:

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3 years ago
If 140 people were surveyed, how many preferred crab?
Cloud [144]

If 140 people were surveyed, from the given table, the number of people that preferred crab is; 42

<h3>How to work with percentages?</h3>

We are given;

Total sample size; n = 140

Now, from the table we see the percentages that preffered each seafood.

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