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Lina20 [59]
2 years ago
15

What is the result of substituting for yin the bottom equation? y=x+3 y= x^2 + 2x - 4​

Mathematics
1 answer:
marta [7]2 years ago
4 0

Answer:

  x +3 = x^2 +2x -4

Step-by-step explanation:

Straight substitution of the top expression for y gives you ...

  x +3 = x^2 +2x -4

__

This lets you rewrite the equation to standard form as ...

  x^2 +x -7 = 0

and find the solutions to be ...

  x = (-1±√29)/2

Corresponding y-values will be 3 more than this:

  y = (5±√29)/2

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Select the correct response for three consecutive integers whose sum is 42.
Kisachek [45]

Answer:

C. 13, 14, 15

Step-by-step explanation:

All you do is add them up and it equals to 42.

5 0
2 years ago
Read 2 more answers
Someone explain how to do this please!! dont need just an answer but explain as well
Leya [2.2K]

6.5 goes in the first box and 5.5 goes in the second box.

Explanation for first box: 13+2 is 15 and half of 15 is 7.5 so you need to take 13 and subtract 7.5. Once you do that, you end up with 6.5

Explanation for second box: (The negative 7 doesn't matter because you want the absolute value) 18+7 is 25 and half of 25 is 12.5. 18-12.5 is 5.5 so the answer would be 5.5

8 0
2 years ago
Please help and show work
shepuryov [24]
What’s the question????
5 0
2 years ago
The sum of two numbers is 47. The greater number is 9 more than the smaller number. Which equation can be used to solve for the
Snezhnost [94]

Answer:

Step-by-step explanation:

We are given

X + Y = 47\\and\\Y = X + 9\\\\use \: substitution\\X + (X + 9) = 47

3 0
3 years ago
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HELP DUE IN 2 HOURSSS
tekilochka [14]

Answer:

1.05 miles per hour

Step-by-step explanation:

m = y2 - y1/ x2 - x1 (It doesn't matter which you choose to be y2 and y1, just make it consistent)

m = 4.2 - 2.1/ 4 - 2

m = 2.1 / 2

m = 1.05

6 0
2 years ago
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