If(2x,x+y)=(y,9)find x and y.
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Answer: False

If two lines intersect, then they intersect at one point only, so it makes no sense to mention a second point. This is assuming that we're not talking about two lines intersecting infinitely many times (i.e. one line overlapping another perfectly).

Answer:

1st option

Step-by-step explanation:

Using the rule of exponents

[tex]a^{m}[/tex] × [tex]a^{n}[/tex] ⇔ [tex]a^{(m+n)}[/tex] ( which can be used on more than 2 numbers )

Given

(- 7)² × [tex](-7)^{5}[/tex] × [tex](-7)^{-9}[/tex]

= [tex](-7)^{(2+5-9)}[/tex]

= [tex](-7)^{-2}[/tex]

Step-by-step explanation:

72° and a° is the angle of a straight line so

a+72°=180

a=180-72

a=108°

By using alternate exterior angle definition:

7x+24=180

7x=108-24

7x=84

x=84/7

x=12

The percent  of carbon within the sample of octane is 84.25%

A percentage is a fraction of a total amount divided into hundred parts

The percent  of carbon within the sample of octane = (grams of carbon / grams of octane) x 100

(78.1 g / 92.7 g) x 100 = 84.25%

To learn more about percentages, please check : https://brainly.com/question/19179977?referrer=searchResults

The percent of carbon within the sample of octane in the exercise is:

Calculation of percentages using the rule of three.

To make a calculation of the percentage of a sample, a simple rule of three can be used, where it is identified:  

The octane sample is used as 100% since it is the total sample, while carbon is only a part of it, now we proceed to calculate:

In this way, it can be identified that the percentage of carbon in the octane sample is approximately 84.25%.

If you want to see another exercise about percentages, you can visit the next link: https://brainly.com/question/6269728?referrer=searchResults

Answer:

2380

Step-by-step explanation:

[tex]\frac{2151.52}{1+0.13} }[/tex] x [tex]\frac{100}{80}[/tex]

Answer:

I don't know plz help me it's my exam I need this answer

Answer:

the answer is b!!!!!!!!!!!!

(3x-3)(x²+3)

=x²(3x-3)+3(3x-3)

=3x³-3x²+9x-9

Answer:

Area= 94.9375

Step-by-step explanation:

Answer:

True

Step-by-step explanation:

Answer: True

Step-by-step explanation:

Step-by-step explanation:

Solution,

f(x) = -4x2 + 19

f(x)=-8+19

f(x)=27

As it is a constant function, therefore

f(-7)=27

Answer:

x=2

Step-by-step explanation:

let the unknown number be x

now we are to find x regarding the question as an equation, let's form the equation to solve for x

the interpretation of the question is:

(x² + x)/3 = x

by collecting the like terms:

(x²+ x) = 3x

x² + x = 3x

x² = 3x - x

x² = 2x

x = 2

Answer:

The number you thought to start with, X

Step-by-step explanation:

Magician's secret:

Step 1: Let the original number you thought of be X

Step 2: 2 × x = 2X

Step 3: 2X + X = 3X

Step 4: 3X/3

》X

Answer:

the sum of interior angles of a 14 sided shape be 2160

Answer:  D)  2160

Work Shown:

S = sum of the interior angles of a polygon with n sides

S = 180(n-2)

S = 180(14-2)

S = 180*12

S = 2160

Answer:

1/6

Step-by-step explanation:

The total amount of people 8+4=12

there are 4/2=2 girls with glasses

the probability to chhose a girl with glasses is 2/12=1/6

Answer:

P(not red marble)=8/11

Step-by-step explanation:

sample space is 110

subtract the red (30)

110-30=80

80/110=8/11

gg ez

Answer:

Step-by-step explanation:

I don't get this question

Answer:

√181 units

Step-by-step explanation:

P(x1,y1)=(8,6)

P(x2,y2)=(-2,-3)

steps are in the picture above.

Answer:

[tex]\frac{31}{-8n}[/tex]

Step-by-step explanation:

Overall, the expression is a quotient, and you're dividing 31 by whatever the product is of -8 and an unknown number (a variable). The product of -8 and a number means you multiply them together

Answer:

     y=x-3

Step-by-step explanation:

x=3       x=-1      x=0     x=2       x= -5       x= -2        x=1

y=3-3   y= -1-3  y=0-3  y=2-3    y= -5-3   y= -2-3     y=1-3

y =0     y= -4     y= -3   y= -1      y= -8      y= -5        y=-2

Hope you got it.If you have any doubts regarding this ask me without any hesitation I will solve it.

Hi there!  

»»————-　★　————-««

I believe your answer is:  

[tex]-4d[/tex]

»»————-　★　————-««  

Here’s why:  

⸻⸻⸻⸻

[tex]\boxed{\text{Simplifying the Expression Given...}}\\\\d-3d-2d\\-------------\\\rightarrow 1d-3d-2d\\\\\rightarrow -2d - 2d\\\\\rightarrow \boxed{-4d}[/tex]

⸻⸻⸻⸻

»»————-　★　————-««  

Hope this helps you. I apologize if it’s incorrect.  

Answer:

AB and AC are radii of Circle A.

Step-by-step explanation:

Note that both B and C are on the edge of Circle A. Hence, AB and AC are radii of the same circle.

And by definition, radii of the same circle have equivalent lengths.

hey <3

negative exponentials can be written as a power of a fraction

for example, 4^-2 can be written as 1/(4^2)

thus, your answer would be 1/(5^2)

hope this helps :)

Answer:

[tex]\frac{1}{25}[/tex]

Step-by-step explanation:

Using the rule of exponents

[tex]a^{-m}[/tex] = [tex]\frac{1}{a^{m} }[/tex] , then

[tex]5^{-2}[/tex] = [tex]\frac{1}{5^{2} }[/tex] = [tex]\frac{1}{25}[/tex]

Answer:

x=25

Step-by-step explanation:

because i divided

Answer:

Step-by-step explanation:

[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]

Answer:

Step-by-step explanation:

Answer:

the last one

Step-by-step explanation:

Answer:

Step-by-step explanation: