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3 years ago

Y=-x+7 , y=x-1 and show your work Help !

Mathematics

1 answer:

Gelneren [198K]3 years ago

7 0

This is a system of equations. The best way to solve it is by realizing that you have two equations equal to y. Since y = y, it follows that $-x+7=x-1$ . Solving for x, you get 4.

$7=2x-1 \\ 8=2x \\ 4=x$

Then, substitute 4 into one of the original equations to find y.

$y=(4)-1=3$ .

The solution is $(4,3)$ . I have attached a graphical representation of the solution as well.

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The temperature in Monarch, Wisconsin, was -3° F at 6:00 a.m. The temperature rose 12 degrees in 9 hours. What was the temperatu

ch4aika [34]

Answer:

9 degrees

Step-by-step explanation:

The temperatire was -3 and then rose by 12, -3 + 12 = 9

3 0

3 years ago

Easy, need help, thanks.

TEA [102]

Answer:

Step-by-step explanation:

The triangles are congruent bu HL.

m<RCD = m<PCD = 35 deg

5 0

2 years ago

Read 2 more answers

(Round to the nearest tenth of a percent.) In 2011, the IRS increased the deductible mileage cost to

RUDIKE [14]

Answer:

$\%Change = 8.8\%$

Step-by-step explanation:

Given

$Initial = 51\ cents$

$Final = 55.5\ cents$

Required

Determine the percentage change

Percentage change is calculated as;

$\%Change = \frac{Final - Initial}{Initial} * 100\%$

$\%Change = \frac{55.5 - 51 }{51 } * 100\%$

$\%Change = \frac{4.5}{51} * 100\%$

$\%Change = \frac{4.5* 100\%}{51}$

$\%Change = \frac{450\%}{51}$

$\%Change = 8.8\%$

<em>Hence, the percentage change is approximately 8.8%</em>

6 0

2 years ago

I honestly don't even know where to start //// on his last 4 tests , Danilo scored 55% 78% 84% and 93%. What score should he get

skelet666 [1.2K]

Answer:

The answer to your question is He must get 80%

Step-by-step explanation:

Data

Scores 55%, 78%, 84%, 93% and X

Average 80%

Process

1.- Write a equation to solve this problem

- There are five scores

Score 1 = S1 = 55

Score 2 = S2 = 78

Score 3 = S3 = 84

Score 4 = S4 = 93

Score 5 = S5 = X

Equation

Average = (S1 + S2 + S3 + S4 + S5) / 5

- Solve for S5

5 Average = S1 + S2 + S3 + S4 + S5

S5 = 5 Average - S1 - S2 - S3 - S4

- Substitution

S5 = 5(80) - 55 - 78 - 84 - 93

- Simplification

S5 = 400 - 310

- Result

S5 = 90

5 0

3 years ago

Write the equations for the line parallel and the line perpendicular to the given line passing through the given point.

pashok25 [27]

Answer:

10. y=2x+1 y = -1/2x +1

11. y=-1/3x +6 y = 3x -4

12. y=-5x-18 y=1/5x + 14/5

Step-by-step explanation:

To write the equation of a line we must have a slope and a point. To find the slope, we use the slope from the equations for parallel lines and modify it for perpendicular lines.

10. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form. The slope here is 2. The parallel slope is 2 and the perpendicular slope is the negative reciprocal or -1/2.

Parallel Perpendicular

(y-1)=2(x-0) (y-1)==-1/2(x-0)

y-1=2x y-1 = -1/2 x

y=2x+1 y = -1/2x +1

11. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form. The slope here is -1/3. The parallel slope is -1/3 and the perpendicular slope is the negative reciprocal or 3.

Parallel Perpendicular

(y-5)=-1/3(x-3) (y-5)=3(x-3)

y-5=-1/3x+1 y-5 = 3x - 9

y=-1/3x +6 y = 3x -4

12. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form. The slope here is -5. The parallel slope is -5 and the perpendicular slope is the negative reciprocal or 1/5.

Parallel Perpendicular

(y-2)=-5(x--4) (y-2)=1/5(x--4)

y-2=-5(x+4) y-2 = 1/5(x +4)

y-2=-5x -20 y-2 = 1/5x +4/5

y=-5x-18 y=1/5x + 14/5

4 0

2 years ago