Solve the system by substitution.
y= -x
10x+2y=40

Answer:

80

Step-by-step explanation:

Step-by-step explanation:

x2-6x-7=2

(x2-6x-7)+7=2+7 -6x+x2+7. 6x+x2=9

Step-by-step explanation:

here it is. ...............

Answer:

y = x -7

Step-by-step explanation:

y2 - y1 / x2 - x1

-5 - (-2) / 2 - 5

-3/-3

1

y = x + b

-2 = 5 + b

-7 = b

y = -7

y = x -7

Answer:

a i forgot

Step-by-step explanation:

Answer:

100%

Step-by-step explanation:

Answer: 100 is your answer hope this helped

plz make brainly

Step-by-step explanation:

Answer:

A and E

Step-by-step explanation:

hope that helps

Answer:

x=.5, y=-5.5

Step-by-step explanation:

7x+y=5, 7x+y=-2

Simplifing 7x+y=5 first

7x+y=5

y=-7x+5

Next, 7x+y=-2

7x+y=-2

y=-7x-2

Plugging in -7x+5 into y

-7x+5=-7x-2

-14x=-7

x=.5

Plugging .5 into y=-7x-2

y=-7(.5)-2

y=-3.5-2

y=-5.5

I used substitution if your couldn't tell

Hope it helps!

Brainliest maybe? :o

Answer:

42 square units

Step-by-step explanation:

Hello There!

The area of a trapezoid can be found using this formula

[tex]a = \frac{a + b}{2} h[/tex]

where a and b are bases and h is height

if you look at the graph we can see that the lines are counting by 2 units

knowing this we want to find the dimensions

the shown trapezoid has the following dimensions

a =2*2 or 4

b=5*2 or 10

h=3*2 or 6

having found this information we then plug it into the formula

[tex]a = \frac{4+ 10}{2} 6 \\ 4 + 10 = 14 \\ \frac{14}{2} = 7 \\ 7 \times 6 = 42[/tex]

so we can conclude that the area of the trapezoid is 42 square units

Preface: We know that the radius of the cylinder is 2 inches and the height is 7 inches. Using the surface area formula (for a cylindrical figure), which has been provided below, we can, through calculations, figure out that the surface area of the cylinder is...

Formula: A = 2π × r × h + 2πr2= 2πr (h + r)

Variables: The "A" is the answer; "R" represents the radius and the "H" is the variable for the height of the cylinder. For the purpose of this question, we'll substitute 3.14 for pi (π).

Surface Area ≈ 113.1, or if you want the exact solution: 113.09734.

Answer:

13.7

Step-by-step explanation:

Answer:

x=36

Step-by-step explanation:

22+x=58

22-22= cross that out

58-22= 36

x=36

Answer:

Does this help I hope it does :D

How to find the domain and range of a function?

Another way to identify the domain and range of functions is by using graphs. Because the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

Step-by-step explanation:

9514 1404 393

Answer:

  13c = 206.57

Step-by-step explanation:

If c is the cost of 1 quart of sauce, then 13c is the cost of 13 quarts. We are told that is $206.57, so the equation is ...

  13c = $206.57

__

You may be required to leave the dollar sign out of the equation. If you leave it in, then the answer comes with its own units (dollars).

  c = $206.57/13 = $15.89

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: y + 4= 9/4(x - 3)

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer:

m<2 = 150

Step-by-step explanation:

m<2 = 150 because of alternate exterior angles

Answer:72

Step-by-step explanation:

72+37=109

180-109=72

I IS MATH

Answer:

72°+37°+x°=180°(being exterior angles)

109°+x°=180°

x°=180°-109°

x°=71°

Answer:

= 41.32N  

To find N amount

You find the kg weight then times it by 10 then divide that amount by 1/2

So that 180pounds = 81.6466 x 10kg

x10 = 816.466

81.6466 / 2 = 40.8233

sin(30) = 40.8233/T

T =  40.8233/sin (30) =  N / sin(30) = Tension = calculator = -41.3178070464 = 41.32 N

Answer:

To see if multiple ratios are proportional, you could write them as fractions, reduce them, and compare them. If the reduced fractions are all the same, then you have proportional ratios.

Step-by-step explanation:

hope this helped :)

Answer:

22.62°

Step-by-step explanation:

Considering △ABC.  If angle B C A is a right angle, then;

m<BCA = 90 degrees

Given also

AB = 13

BC = 12

AC = 5.

According to SOH, CAH TOA;

Sin <B = AC/AB

Cos <B = BC/AB

Substitute the given values

Sin B = 5/13

B = arcsin(5/13)

B = 22.62

Cos B = 12/13

B = arccos (12/13)

B =22.62

Hence the angles that make sinB = cosB is 22.62°

Answer:

sin(A)=cos(B)

sin(B)=cos(A)

Step-by-step explanation:

I did it, but if you're seeing this, have a good day

Answer:

b.) -4

Step-by-step explanation:

You can subtract 9 from -5 to get -14. then when you add 10 to that, you will get -4.

Answer:

the second answer is the answer

Answer:

x = 3/5√10

y = 2√10

Step-by-step explanation:

using the Pythagorean theorem:

y² = 7² - 3² = 49 - 9

y² = 40

y = 2√10

3/4.5 = y/5x

4.5y = 15x

substitute for y:

4.5(2√10) = 15x

15x = 9√10

divide both sides of the equation by 15:

x = (9√10)/15 = 3/5√10

Answer:

78.8 %

Step-by-step explanation:

From the question,

Area of the square = L²

A = L²

Where L = Length of the square.

From the diagram,

L = 4 in

Therefore,

A = 4²

A = 16 in².

Also,

Area of the circle (A') = πr²

Where r = radius of the circle.

Given: r = 2 in

Therefore,

A' = 22/7(2²)

A = 12.6 in²

Hence,

The probability that a randomly selected points within a square falls in the blue shaded area (Pr) = A'/A

Pr = 12.6/16

Pr = 0.7875

Pr(%) = 78.75

Pr(%) = 78.8 %

Answer:

Step-by-step explanation:

Very simple.

p - 5 = 19

So to take out the -5 on that side, you must also do the same thing to the other side. So adding 5 in one side of the equal sign would mean you have to do the same thing on the other side of the equal sign.

SO:

p-5 +5 = 19+5

p = 24

Answer:

the second one and third one

Step-by-step explanation:

Answer:

Top box is +, left box is +, right box is -, bottom box is +

Step-by-step explanation:

Hopefully that makes sense lol

Answer:

In standard form it is x^4 - 12x^3y + 54x^2y^2 - 108x y^3 + 81y^4.

Step-by-step explanation:

(3y)^4 + 4C1(3y)^3(-x) + 4C2(3y)^2(-x)^2 + 4C3(3y)(-x)^3  + (-x)^4

= 81y^4 - 108y^3x + 54y^2x^2 - 12yx^3 + x^4

Answer:

You donf have the picture shown, how is anybody supposed to work on it