Solving System equations using substitution

5x+2y=21
-x-y=-9
Can someone help solve this

Answer:

I think it C

Step-by-step explanation:

Let's solve your equation step-by-step.

(k−4)2=9

Step 1: Simplify both sides of the equation.

k2−8k+16=9

Step 2: Subtract 9 from both sides.

k2−8k+16−9=9−9

k2−8k+7=0

Step 3: Factor left side of equation.

(k−1)(k−7)=0

Step 4: Set factors equal to 0.

k−1=0 or k−7=0

k=1 or k=7

Answer:

k=1 or k=7

Hope this helps! :)

Square both sides:

K -4 = sqrt(9)

With the answer being a square root rewrite with a postive and negative value:

K-4 = sqrt(9)

And

K-4 = -sqrt(9)

Simplify each:

K-4 = 3

And

K-4 = -3

Solving for k in each one you get answer

C. {1,7}

Answer:

i dont understand russian

Step-by-step explanation:

Answer:

whats ur question lol

Step-by-step explanation:

Answer:

ok fine but you'll have to visit the nobotsite.com lol jk its not real

Step-by-step explanation:

Answer:

y=-2x+1

Step-by-step explanation:

2x+y=1

y=-2x+1

nnd my day has been pr good :)

Answer:

y=-2x+1

Step-by-step explanation:

I hope this helps. I'm doing great.

Answer:

-0.38%

Step-by-step explanation:

Divide 31 by 50. 31 / 50 = 0.62.

1 - 0.62 = 0.38

Since it is a decrease in change the percent change is negative.

-0.38%

Answer:

four arithmetic means between 17 and 37 is:

21,25,29,33

Step-by-step explanation:

Answer:

15 customers

Step-by-step explanation:

Given data

Total Number of customers= 25

60% of 25 customers made an additional purchase

Hence the number of customers that made additional purchase is

=60/100*25

=0.6*25

=15customer

Hence 15 customers made additional purchase

Answer:

x ≈ 47°

Step-by-step explanation:

Using the sine ratio in the right triangle

sinx° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{8}{11}[/tex] , then

x = [tex]sin^{-1}[/tex] ([tex]\frac{8}{11}[/tex] ) ≈ 47° ( to the nearest degree )

Answer:

c

Step-by-step explanation:

took test & got it right

Answer:

it is C-192 in2

Step-by-step explanation:

I am 100% sure this is correct

The volume of the given hemisphere is 59131.7 inches³.

What is a hemisphere?

Hemisphere is the exact one-half of the sphere.

given, diameter of the hemisphere is = d = 60.9 inches

Therefore, radius = d/2 = 60.9/2 inches = 30.45 inches.

Hence, the volume = (2/3) × π × r³ =  (2/3) × π × (30.45)³ inches³ = 59131.7 inches³.

Learn more about the volume of the hemisphere here: https://brainly.com/question/23118911

#Tag #SPJ2

Answer:

I think it is c because yah

Answer:

Hiiiii ,i neeeeeed your help :

b) Match the lines from the song with the corresponding events and dates in American history.

Thaaaaaaaaanks you veryyyyyy veryyyyy muuuuuuuch

Answer:

The solution is (0, 4)

Step-by-step explanation:

Please pay attention to the first two equations and drop the last two:

12x−5y=−20 y=x+4 x=x=x, equals y=y=y   should ideally be:

12x−5y=−20

y=x+4

Let's find x.  Substitute x + 4 for y in the first equation, obtaining:

12x - 5(x + 4) = -20

Carrying out the indicated multiplication, we get:

12x - 5x - 20 = -20, or 7x = 0

If x = 0 then y must be 0 + 4, or 4.  

The solution is (0, 4)

Answer:x=0 y=4

Step-by-step explanation: khan

Answer: a. (-2, -2)

Step-by-step explanation:

The point at which the two lines intersects is at (-2, -2), which is the solution.

lol the handwriting hurts

Answer:

other person!

Step-by-step explanation:

give the other person brainliest; hope you pass the class!

Answer:

665

Step-by-step explanation:

The range is the difference between the smallest and highest numbers in a list or set. To find the range, first put all the numbers in order. Then subtract (take away) the lowest number from the highest. The answer gives you the range of the list.

Answer:

The Range is 655

Answer:

1.75(x)

Step-by-step explanation:

you can make an algebraic expression to make this simpler. if x = the number of tickets. then, you want to create the expression. it will be ....    1.75(x).

you plug whatever number you need for the table in as x. for example, if you want to see how much money diego would make for 6 tickets you write   1.75*6

Answer:

Factor

Step-by-step explanation:

Answer:

-9n + 36

Step-by-step explanation:

1. -9(n - 4)    -Distribute

2. -9n + 36  -Answer

[tex]\huge\fbox{\sf{Answer:~~{\boxed{-9n+36}}}}[/tex]

Step-by-step explanation:

Hi there!

Let's simplify this expression. It's easy, because all we have to do is "distribute"  -9:

[tex]\bold{-9(n-4)}[/tex]

[tex]\bold{-9n+36}[/tex]

Hope it helps!

#[tex]\rm{HaveAnAmazingDay:)[/tex]

~ [tex]\sf{Just~a~teenage~girl~willing~to~help[/tex]

[tex]\bold{Besties4Ever:-):-):-)}[/tex]

Answer: Memorize the formula

Step-by-step explanation:

( x / a )^2 - ( y / b )^2 = 1

Where a and b are the semi-axis

The value of a is half the distance from points that cuts off x-axis, in this case

From -5 to 5 there is 10 so 5 is value of "a"

Value of b can find by the formula

c^2 = a^2 + b^2

Which c is the value of the point bold on the rightmost place in x axis. In this case its 13

13^2 = 5^2 + b^2

169 = 25 + b^2

b = 12

SO we got a = 5, b = 12

ANSWER: (x/5)^2 - (y/12)^2 = 1

Answer:

Step-by-step explanation:

Answer:

what you just answered

Step-by-step explanation:

2(5) + 3 = 13 so (5,1) is not

Answer:

D is the correct answer.

Step-by-step explanation:

1 times 2 is 2 plus 3 is 5, so its not A

2 times 2 is 4 plus 3 is 7 so its not B

and 3 times 2 is 6 plus 3 is 9 so it cant be C either

Therefore its D.

sir........you gucci?

Answer:

Answer would be 12

Step-by-step explanation:

i'm not always accurate but your welcome!

Answer:

B, C , F

Step-by-step explanation:

The age multiplied 55, so the shell grows at rate of 55mm per year

in fact if the age is 2 we have (55 x 2) = 55 + 55

if 3 = (55 x 3) = 55 + 55 + 55

and so on

When the turtle is hatched the shell is 37 mm in lenght.

In fact, if we substitute 0 to a, we have

s = (55 x 0) + 37

s = 37

when the turtle is 1 year old, the shell is 92 mm in length.

in fact if we substitu a with 1, we have

s = (55 x 1) + 37

s = 55 + 37

s = 92

Answer:

The slope is -8/3

Step-by-step explanation:

Answer:

This answer is A

Step-by-step explanation:

i got you bro, im quick

Answer:

f(x)=(x-2)(x+2)(x-4)

Answer:

5 : 9

Step-by-step explanation:

divide both terms by the greatest common factor which in this case is 5