1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
goldenfox [79]
3 years ago
11

X + y = -1 X - y = 7

Mathematics
1 answer:
enyata [817]3 years ago
4 0
1: Solve for either x or y in one of the equations. So x + y = -1 is y = -x -1
2: substitute the new equation in the opposite equation. So x - (-x - 1) = 7
3: distribute the negative. X + x + 1 = 7
4: combine like terms. 2x + 1 = 7
5: solve for x. Subtract 1 on both sides. 2x = 6
6: divide by 2 to get x by itself. X = 3
7: plug the new value of x into one of the ORIGINAL equations. 3 + y = -1
8: solve for y. Subtract 3 on both sides.
Y = -4
9: the solution is written as (x,y) so the solution would be (3, -4)
You might be interested in
Complete the equation of this circle:
adell [148]

Answer:

9

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Recall the scenario about Eric's weekly wages in the lesson practice section. Eric's boss have been very impressed with his work
Alona [7]

Answer:  

1)\quad f(x)=\bigg\{\begin{array}{ll}12x&0\leq x

2) D: x = [0, 24]

3) R: y = [0, 384]

4) see graph

<u>Step-by-step explanation:</u>

Eric's regular wage is $12 per hour for all hours less than 9 hours.

The minimum number of hours Eric can work each day is 0.

f(x) = 12x    for   0 ≤ x < 9

Eric's overtime wage is $18 per hour for 9 hours and greater.

The maximum number of hours Eric can work each day is 24 (because there are only 24 hours in a day).

f(x) = 18(x - 8) + 12(8)

    = 18x - 144 + 96

    = 18x - 48           for 9 ≤ x ≤ 24

The daily wage where x represents the number of hours worked can be displayed in function format as follows:

f(x)=\bigg\{\begin{array}{ll}12x&0\leq x

2) Domain represents the x-values (number of hours Eric can work).

The minimum hours he can work in one day is 0 and the maximum he can work in one day is 24.

D:  0 ≤ x ≤ 24        →        D: x = [0, 24]

3) Range represents the y-values (wage Eric will earn).

Eric's wage depends on the number of hours he works. Use the Domain (given above) to find the wage.

The minimum hours he can work in one day is 0.

f(x) = 12x

f(0) = 12(0)

     =  0

The maximum hours he can work in one day is 24 <em>(although unlikely, it is theoretically possible).</em>

f(x) = 18x - 48

f(24) = 18(24) - 48

       = 432 - 48

       = 384

D:  0 ≤ y ≤ 384        →        D: x = [0, 384]

4) see graph.

Notice that there is an open dot at x = 9 for f(x) = 12x

and a closed dot at x = 9 for f(x) = 18x - 48

4 0
2 years ago
I need help on 1 and 2 I’m very confused
Goryan [66]
1a. Split the larger piece(1/3) into half to show the two pieces
1b. Both are 3/6 or 1/2
2a. It shows 1/2 +1/4
2b.cut it so there are 3 1/4 pieces, so cut the 1/2 piece horizontally in the middle
2c. 2/4 + 1/4 = 3/4. 1/2 + 1/4 = 3/4
5 0
3 years ago
On a single roll of a pair of dice, what are the odds against rolling a sum of 7? Please help ASAP!!! :(
Kobotan [32]
Honestly I don’t remember how to do this but u can try .083 but don’t count on it
7 0
2 years ago
Find the unit rate.<br> 1/3 kilograms : 2/3 foot.
Darya [45]

Answer:

0.5kg per foot

Step-by-step explanation:

1/3 : 2/3

1 : 2

1 kg is 2 feet

0.5 kg/foot

5 0
3 years ago
Read 2 more answers
Other questions:
  • It takes Francisco 15 minutes to ride his bicycle 4km ,which is the distance from home to school . What is the average speed
    5·1 answer
  • Create a 3rd degree polynomial function with one zero at three. Sketch a graph
    13·1 answer
  • Does T Launcher have viruses or anything like that?
    7·2 answers
  • Find the sum +5+(-2)
    10·1 answer
  • If the function graphed is f(x), find f(1).<br> A) -4 <br> B) -1/4<br> C) 0 <br> D) 4
    12·2 answers
  • You earn 360 dollars every 4 weeks how much money do you make in one week
    6·2 answers
  • Please help me fast :) I'll give brainly and you'll get 15 points
    14·1 answer
  • A scientist claims that 4% of viruses are airborne. If the scientist is accurate, what is the probability that the proportion of
    5·1 answer
  • What is the slope-intercept equation<br> for the following line?
    10·1 answer
  • Please answer this question friends I can't understand ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!