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Novay_Z [31]
3 years ago
7

What is the solution set of y = x2 2x 7 and y = x 7

Mathematics
2 answers:
Anna71 [15]3 years ago
8 0
Hello,

y=x²+2x+7
y=x+7

==>x²+2x+7=x+7
==>x²+x=0
==>x(x+1)=0
==>(x=0 and y=7) or (x=-1 and y=-1+7=6)

Sol={(0,7),(-1,6)}

SVETLANKA909090 [29]3 years ago
4 0

Answer:

Given the equation:

y =x^2+2x+7 and y=x+7

Equate these two equation we get;

x^2+2x+7 = x+7

Subtract 7 from both sides we get;

x^2+2x= x

Subtract x from both sides we get;

x^2+x= 0

or

x(x+1)=0

⇒x = 0 and x +1=0

⇒x = 0 and x = -1

Now, find the values of y:

For x  = 0

y=x+7

y = 0+7 = 7

⇒(0, 7)

For x = -1

y=x+7

y = -1+7 =6

⇒(-1, 6)

Therefore, the solution set for the given equations are: (0, 7) and (-1, 6)

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Well you have to subtract -2 to both sides and it well look like Y= -2+13 and then y=x+4
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3 years ago
A)Natalie has read 3/4 of a book that is 120 pages long. How many pages does she have left to read?
drek231 [11]
A) (1/4)*120=
B) 22.5 or 22 1/2
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How many people can you serve with 6 pizzas if each pizza is 3/4 of a pizza?
3241004551 [841]
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7 0
3 years ago
Simplify- 10x-8y +3x-2y
AleksandrR [38]

Answer:

13x-10y

Step-by-step explanation:

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5 0
3 years ago
I WILL AWARD BRAINLIEST IF YOU ANSWER ALL OF THESE!! THANK YOU!!
vaieri [72.5K]

Answer:

<u>1. The number is 71.3</u>

<u>2. The number is 127.1</u>

<u>3. The number is 230</u>

<u>4. The number is 34</u>

Step-by-step explanation:

Let's find out the numbers, x, for each case:

1. 5% of it is 5% of it is 23% of 15.5

5% = 0.05

23% of 15.5 = 0.23 * 15.5 = 3.565

Then, we have:

0.05x = 3.565

x = 3.565/0.05

x = 71.3

<u>The number is 71.3</u>

2. 4% of it is 31% of 16.4

4% = 0.04

31% of 16.4 = 0.31 * 16.4 = 5.084

Then, we have:

0.04x = 5.084

x = 5.084/0.04

x = 127.1

<u>The number is 127.1</u>

3. 4.5% of it is 23% of 45

4.5% = 0.045

23% of 45 = 0.23 * 45 = 10.35

Then, we have:

0.045x = 10.35

x = 10.35/0.045

x = 230

<u>The number is 230</u>

4. 5.5% of it is 17% of 11

5.5% = 0.055

17% of 11 = 0.17 * 11 = 1.87

Then, we have:

0.055x = 1.87

x = 1.87/0.055

x = 34

<u>The number is 34</u>

8 0
3 years ago
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