hi I need answer please. I will mark brainliest who can answer thankyou...

Answers

Answer 1

Answer:

a) (0,0), (-4, 1), (-1,2)b) None

Step-by-step explanation:

There are two ways of solving similar problems. One- substitute x and y with respective coordinates and verify if the inequalities are correct. Two- graph the lines and see if the points are in the intersection zones.We'll go with the first method. Remember both inequalities should be correct for the same point to accept it as a solution.

Given points

(0,0), (-4,1), (-1,2)a) The system of inequalitiesy > x - 1y < -1/2x + 2

Point (0,0)

0 > 0 - 1 = -1 correct0 < -1/2(0) + 2 = 2 - correctYes

Point (-4,1)

1 > -4 - 1 = -5 - correct1 < -1/2(-4) + 2 = 4 - correctYes

Point (-1,2)

2 > -1 - 1= -2 - correct2 < -1/2(-1) + 2 = 2.5 - correctYesb) The system of inequalitiesx - 2y ≥ 42x - y ≥ -1

Point (0, 0)

0 - 2(0) = 0 ≥ 4 - incorrect2(0) - 0 = 0 ≥ -1 - correctNo

Point (-4, 1)

-4 - 2(1) = - 6 ≥ 4 - incorrect2(-4) - 1 = - 9 ≥ -1 - correctNo

Point (-1,2)

-1 - 2(2) = -5 ≥ 4 - incorrect2(-1) - 2 = - 4 ≥ -1 - correctNo

Answer 2

9514 1404 393

Answer:

a. all points are part of the solution set

b. no points are in the solution set

Step-by-step explanation:

Graphs of the two systems of inequalities are attached.

a) The red area on the graph is the solution. The two inequalities can be combined to one compound inequality:

x -1 < y < -1/2x +2

The two boundary lines intersect at x-1 = -1/2x +2 ⇒ x = 2, so there are no points in the solution set with x-values of 2 or greater.

All of the given points are in the solution set.

b) The green area of the graph is the solution. Solving each inequality for y gives ...

x -2y ≥ 4 ⇒ 1/2x -2 ≥ y

2x -y ≥ -1 ⇒ 2x +1 ≥ y

The allowed values of y must be less than or equal to the minimum of these limits. The limits have the same value at 1/2x -2 = 2x +1 ⇒ x = -2, so the solution set is the area below and right of that intersection point of the two boundary lines.

None of the given points are in the solution set.

Related Questions

please find x

plz help me plz

Answers

Answer:

x=18

Step-by-step explanation:

7x+15=141

7x=141-15

7x=126

7/7=126/7

x=18

have a good day!

pls brainliest

Match the following expression 12(x-3)+18=6(x-3) with the number of solutions below.
A.One solution?
B.No solution ?
Or
C.All solution?

Answers

Answer:

One solution, which is x=0.

Step-by-step explanation:

12(x-3)+18=6(x-3)

12x-36+18=6x-18

12x-18=6x-18

12x-6x-18=-18

6x-18=-18

6x=-18+18

6x=0

x=0/6

x=0

In ΔLMN, ∠L = 55°, ∠M = 85°, find measure of ∠N.

Answers

Answer:

40 degrees

Step-by-step explanation:

the angles of a triangle add up to 180 degrees,

180 = x + 85 + 55

180 = x + 140

40 = x

Find the missing number.
330 =
22
Submit

Answers

Answer:

Step-by-step explanation:

A, B & C form a triangle where Z BAC = 90°.
AB = 1.2 mm and CA = 3.9 mm.
Find the length of BC, giving your answer rounded to 1 DP

Answers

Answer:

Step-by-step explanation:

bc is hypotunuse

therefore 1.2^2+3.9^2=BC^2

4.1(1dp)

the sides od a triangle are in the ratio3:4:5 &uts perimeter 144 cm .find tye area

Answers

Answer : The area of triangle is 864 cm² and the height corresponding to the longest side is 28.8 cm.

write an equation of the perpendicular bisector of the segment with the endpoints (-8,-1) and (4,5)

Answers

9514 1404 393

Answer:

2x +y = -2

Step-by-step explanation:

The bisector must have a slope that is the negative reciprocal of the slope of the line between these points. It must pass through the midpoint of the segment.

The slope of the line through the given points is ...

m = (y2 -y1)/(x2 -x1)

= (5 -(-1))/(4 -(-8)) = 6/12 = 1/2

The slope of the required bisector is then ...

m = -1/(1/2) = -2

The midpoint of the given segment is ...

((-8, -1) +(4, 5))/2 = (-8+4, -1+5)/2 = (-4, 4)/2 = (-2, 2)

Then the point-slope form of the equation of the bisector is ...

y -y1 = m(x -x1)

y -2 = -2(x -(-2))

y = -2x -4 +2

y = -2x -2 . . . . . . . slope-intercept form equation

2x +y = -2 . . . . . . . standard form equation

11r-12r+15
combine like terms

Answers

Answer:

-r+15

Step-by-step explanation:

Which is the right answer

Answers

Answer:

Step-by-step explanation:

Considering the length of the triangle, I believe the answer is c.

Given that
R=6x+9y

Find y when x=1 and R=39

Give your answer as an improper fraction in its simplest form.

Answers

Answer:

11/3

Step-by-step explanation:

39=6+9y

39-6=9y

33=9y

33/9=y

33/9=11/3

Mandy and Pete have a biased spinner numbered 1, 2, 3, 4, 5. They each want to find an estimate for the probability that the spinner will land on a 5. Mandy spins the spinner 20 times and records the number of times the spinner lands on a 5. Pete spins the spinner 200 times and records the number of times the spinner lands on a 5. Is Mandy or Pete more likely to get the better estimate? You must give a reason for your answer.

Answers

Answer:

Pete

Step-by-step explanation:

Given that:

Mandy's Estimate :

Number of spins , n = 20

Pete's Estimate:

Number of spins, n = 200

A good probability estimate is one which has narrow margin of error with a high degree of confidence. These two variables are affected by sample size.

A high sample size give a narrower margin of error and increases the confidence level probability

Based on the sample size used by each of Pete and Mandy, we can conclude that, Pete's probability estimate would be better due to its significantly higher sample size.

Correct answers will get brainliest

1. expand and simplify. x(2x + 3) + 5 (x - 7)
2. Solve 5 (3y - 2) = 35
3. Write 0.88 as a fraction in its simplest form

Answers

Step-by-step explanation:

1 i dont know

[tex]5(3y - 2) = 35 \\ = 15y - 10 = 35 \\ = 15y = 35 + 10 = 45 \\y = \frac{45}{15} = 3[/tex]

[tex] \frac{88}{100} = \frac{22}{25} [/tex]

Answer:

Step-by-step explanation:

I hope it could help u and if isn't clear then let me know ..

2) A-5=62 PLSSSS HELLPPP

Answers

Answer:

Step-by-step explanation:

a-5=62 add 5 to both sides

a=67

Please select a b c or d

Answers

Answer:

Step-by-step explanation:

What are the coordinates of the points that will complete the square?

PLEASEEEE HELP I WILL GIVE BRAINLIEST

Answers

Answer:

(-2,-1)

Step-by-step explanation:

A square has all equal sides so the number between each point is 3. That means, the point has to be 3 away from the other point.

Answer:

Step-by-step explanation:el primer número siempre es x, entonces lo cuentes primero en la línea horiolas el número de espacios que te pide, el segundo es es y , este o cuentes de arriba hacia abajo.

te dejo la respuesta de todos modos

(-2,-1)

prime factorisation of 28 and 35

Answers

GCF of 28 and 35 is 7.

Answer:

Prime factorization of 28 and 35 is (2 × 2 × 7) and (5 × 7) respectively. As visible, 28 and 35 have only one common prime factor i.e. 7.

A spinner is divided into 12 equal parts. The probability of spinning an x is
How many of the parts are labeled x?
7
9
3
4

Answers

Answer:

Step-by-step explanation

3 x 4

Answer:

Step-by-step explanation:

a walking path BE in a park intersects intersects two sides of the park at their midpoints. You walk from point D to E, E to B, from B to C, and back to point D. How many yards did you walk?

Answers

Answer:

Total distance covered = 436 yards

Step-by-step explanation:

Walking path BE joins the midpoints B and E of the sides AC and AD.

By midsegment theorem,

"Line joining midpoints of two sides of a triangle is parallel and measure half of the third side"

m(BE) = [tex]\frac{1}{2}[m(CD)][/tex]

CD = 2(BE)

CD = 2(74) = 128 yd

From starting point D,

DE = 107 yd

EB = 74 yd

BC = [tex]\frac{254}{2}[/tex]

= 127 yd

CD = 128 yd

Total walking distance = DE + EB + BC + CD

= 107 + 74 + 127 + 128

= 436 yd

Total distance covered = 436 yards

Answer:

456

Step-by-step explanation:

107

254/2 =127

74x2=148

107+74+127+148=456

Question please answer thanks if you do

Answers

Answer:

Radius = 6 ft

Diameter = 12 ft

Circumference = 37.7 ft

Step-by-step explanation:

The radius of the circle is the measurement from the center of the circle to the edge. The diagram gives us the radius, 6 ft.

Radius = 6 ft

The diameter of the circle is the measurement from the edge of the circle through the center, extending back to the edge. The diameter is equal to double the radius.

6*2=12

Diameter = 12 ft

The circumference of the circle is the distance around its edge or the perimeter of the circle. We use the below equation to solve for it:

[tex]C=\pi d[/tex] where [tex]d[/tex] is the diameter

Plug the diameter (12) into the equation

[tex]C=\pi (12)\\C=37.7[/tex]

(This answer is approximate)

Circumference = 37.7 ft

I hope this helps!

SOMEONE ANSWERS THIS ANGLE PLZ !!!!

Answers

Answer: C

Step-by-step explanation:

Answer:

60 degrees

Step-by-step explanation:

a triangle degrees altogether is 180 degrees

80+40=120

so 180-120=60

For which points is the x-coordinate less than -1?

Answers

Answer:

Point A

Step-by-step explanation:

Hope it help

what is the value of n?
enter answer in box

Answers

Answer:

Step-by-step explanation:

chord x chord = chord x chord

(5) (n+8) = (7) (n+4)

i just started plugging in numbers

(5) (6+8) = (7) (6+4)

5 x 14 = 7 x 10

70=70

Plz need help fast will mark the brainiest

Answers

Answer:

0.0081

Step-by-step explanation:

yes bye that's the answer

Answer:

0.0081

Step-by-step explanation:

mark as BRAINLIST I

Please Help Me!! I'll Give Brainliest to the First Person the Answers!!!!

Answers

Answer:

1) 30

2) 13

Step-by-step explanation:

I could be wrong but i counted all of the full squares in the shape

A 5 KG curling rock slides along frictionless ice with a constant velocity of 10 m/s. what's the net force of the rock?

Answers

Answer:

Step-by-step explanation:

Force = mass * acceleration

Given

Mass = 5kg

velocity = 19m/s

IF the velocity of the body is constant, then the acceleration will be zero.

Force = 5 * 0

Force = 0N

Hence the net force on the rock is 0N

find the equation of the line of best fit in slope intercept form . please help

Answers

Answer:

y = (2/5)x + 3

Step-by-step explanation:

Note that the y-intercept is (0, 3) and that the line passes right through the point (5, 5). First we find the slope of this line: m = rise/run.

As we move from (0, 3) to (5, 5), we see that x increases by 5 (the run) and y increases by 2 (the rise). Thus, the slope of this line is m = 2/5.

Now we know that m = 2/5, x = 5, y = 5 and b (the y-intercept) is 3. Then our equation is y = mx + b, or y = (2/5)x + 3

Answer:

The equation is [tex]y = \frac{2}{5} x+3[/tex]

Step-by-step explanation:

The line of best fit has an x-intercept of 3, so the constant in the equation would be 3. Since one of the points on the line is (5, 5), the change in y over the change in x (the slope) is going to be [tex]\frac{5-3}{5-0}[/tex] or [tex]\frac{2}{5}[/tex]. So the line's equation is [tex]y = \frac{2}{5} x+3[/tex].

8th grade math, please help.

Answers

Answer:

The x = 102

Step-by-step explanation:

The whole angle is 180 so you have to do 180-78 to get the other angle .

Answer:

x = 102

Step-by-step explanation:

x + 78 = 180 {linear Pair}

x = 180 - 78

x = 102

Could someone help me with this problem?

Answers

The answer is root 65

Can someone help me with this please and thanks :)

Answers

Y=2x+1 is the correct answer

what is the equation for this graph?

Answers

Answer:

I don’t know I think it is 1,8 tho

Step-by-step explanation:

Sorry if it’s wrong

Answer:

y= -4x+8 or -4/1x+8

Step-by-step explanation:

8 is the slope and it is positive

Rise over run is Right 4 and down 1 so that is Plus 4 and negative 1

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hi I need answer please. I will mark brainliest who can answer thankyou...​

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hi I need answer please. I will mark brainliest who can answer thankyou...