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3 years ago

The intersection of two lines can be a ray. true or false.

Mathematics

1 answer:

GarryVolchara [31]3 years ago

3 0

Step-by-step explanation:

it's false,

it should be a point

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What is the mean,mode,range 6,13,8,9,10,18,10,15,19

lesya [120]

Answer:

Mode-10

Mean-12

Range-13

Step-by-step explanation:

Mode is the most common which is 10

Mean is the averge so you add them all together then diviede based on how many numbers there are

Range is the difference between the smallest and biggest number so you just subtract. Biggest- smallest

4 0

3 years ago

Find 80% of 14,236. Enter the correct answer in the box.

Ludmilka [50]

Answer:

Step-by-step explanation:

11388.8

Hope it helped you.

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4 0

3 years ago

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Y=-x^2+2x+10 y=x+2 Substitution Please show your work Need ASAP

erik [133]

Answer:

The solutions of the system of equations are the points

$(\frac{1-\sqrt{33}} {2},\frac{5-\sqrt{33}} {2})$

$(\frac{1+\sqrt{33}} {2},\frac{5+\sqrt{33}} {2})$

Step-by-step explanation:

we have

$y=-x^{2} +2x+10$ ----> equation A

$y=x+2$ ----> equation B

Solve the system by substitution

substitute equation B in equation A

$x+2=-x^{2} +2x+10$

solve for x

$-x^{2} +2x+10-x-2=0$

$-x^{2} +x+8=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2} +x+8=0$

$a=-1\\b=1\\c=8$

substitute in the formula

$x=\frac{-1\pm\sqrt{1^{2}-4(-1)(8)}} {2(-1)}$

$x=\frac{-1\pm\sqrt{33}} {-2}$

$x=\frac{-1+\sqrt{33}} {-2}$ -----> $x=\frac{1-\sqrt{33}} {2}$

$x=\frac{-1-\sqrt{33}} {-2}$ -----> $x=\frac{1+\sqrt{33}} {2}$

Find the values of y

For $x=\frac{1-\sqrt{33}} {2}$

$y=x+2$

$y=\frac{1-\sqrt{33}} {2}+2$ ----> $y=\frac{5-\sqrt{33}} {2}$

For $x=\frac{1+\sqrt{33}} {2}$

$y=x+2$

$y=\frac{1+\sqrt{33}} {2}+2$ ----> $y=\frac{5+\sqrt{33}} {2}$

therefore

The solutions of the system of equations are the points

$(\frac{1-\sqrt{33}} {2},\frac{5-\sqrt{33}} {2})$

$(\frac{1+\sqrt{33}} {2},\frac{5+\sqrt{33}} {2})$

5 0

3 years ago

Add/Subtract the following polynomials. 1. (3x^2– 5x) + (-x^2- 7X +5)

Lostsunrise [7]

Answer:

2x^2−12x+5

Step-by-step explanation:

Simplify the expression.

6 0

3 years ago

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ABCD is a rectangle AB =15 centimeters AC = 25 cm Find The length of BC

pochemuha

Answer:

the answer is explained below (tap on the photo to view it fully)

8 0

2 years ago

The intersection of two lines can be a ray. true or false. ​

The intersection of two lines can be a ray. true or false.