Solve each system by substitution. − 7x + 2y = − 19
2y − 21 = x

Answer:

bugggaaaa

Step-by-step explanation:

bugggggaaaaa

Answer:

sin 33 and cos 57

Step-by-step explanation:

Sine of an angle equals the cosine of its complement.

Answer:

6. 18

7. 8

do the rainbow method

Answer:

The GCF of 36 and 90 is 18

The GCF of 16, 24, and 40 is 8

Step-by-step explanation:

Answer:

Y = 6

Step-by-step explanation:

On the first day of ticket sales the school sold 3 adult ticket and 8 student tickets for a total of $72. The school took in $152 on the second day by selling 7 adult tickets and 16 student tickets. How much is a student ticket?  

Day 1: 3x + 7y = 72

Day 2: 7x + 16y = 152

This becomes a system of equations.

3x+8y=72

3x+8y+−8y=72+−8y (Add -8y to both sides)

3x=−8y+72

3x/3 =  −(8y+72)/3

X = (-8/3) y + 24

Substitute  (-8/3) y + 24 for x in7x+16y=152:

7(-8/3 y + 24) + 16y = 152

-8/3 y + 168 = 152 (Simplify both sides of the equation)

-8/3 y + 168 − 168 = 152 + (−168) (Add -168 to both sides)

-8/3 y = -16

(-8/3 y)/(-8/3 y) = -16/ -8/3 y (Divide both sides by (-8)/3)

y = 6

Answer:

x^2 + 14x + 49

Step-by-step explanation:

Use the distributive property:

(x + 7)(x + 7) = x^2 + 7x + 7x + 49 = x^2 + 14x + 49

Answer:

the area is C. 39

Step-by-step explanation: If you split them into there own shapes and add them at the end.

2 x 6 = 12

3 x 5 = 15

3 x 4 = 12

12 + 12 = 24

24 + 15 = 39

hope this makes sense

Answer:

Linear equation

Step-by-step explanation:

The rate of change for y with respect to x remains constant for the linear equation.

The rate of change is 3

Answer:

nonliner

Step-by-step explanation:

it changes.

the input is right but the output isn't

Answer:

Easton Redline Sc500

That is the best bat at all time

Step-by-step explanation:

Answer:

no

Step-by-step explanation:

opposite of

[tex] - \frac{2}{5} [/tex]

is 2/5

Answer:

17.5

Step-by-step explanation:

I beleive since we are connecting midpoints you divide each side by 2 and add them all up to get the perimeter of the smaller triangle made with the ratio of 1:2

The midpoints of the sides of ∆EFG are connected with line segments, then the perimeter of that triangle is 15.5 cm.

Triangle is a polygon that has three sides and three angles. The sum of the angle of the triangle is 180 degrees.

Given

If the midpoints of the sides of ∆EFG shown below were connected with line segments.

Then the sides of the triangle get half.

Then the perimeter will be of a new triangle will be

[tex]\rm Perimeter = \dfrac{8}{2} + \dfrac{15}{2} +\dfrac{12}{2}\\\\Perimeter = 17.5[/tex]

Thus, the midpoints of the sides of ∆EFG are connected with line segments, then the perimeter of that triangle is 15.5 cm.

More about the triangle link is given below.

https://brainly.com/question/25813512

Answer:

x = 7

Step-by-step explanation:

The Triangle Sum Theorem tells us that the sum of the measures of a triangle's interior angles is 180. Using this information, we can make an equation to solve for x.

82 + 9x - 6 + 6x - 1 = 180

75 + 15x = 180    (Combine like terms)

15x = 105            (Subtract 75 from both sides)

x = 7                    (Divide both sides by 15)

We can plug the value of x back into the equation to make sure of this answer.

Answer:

112

Step-by-step explanation:

I took the same test

Answer:

area of trapezium = a+b ×h (a+b = base +base )

2

38+18÷2×16

37×16

Answer- 1234

Step-by-step explanation:

sorry

Answer:

An inequality that represents the number of classes. C, that Theo can take is: 8c+12<=154.

Step-by-step explanation:

Answer: this parabola has 2 x intercepts witch are -4,0 and -8,0

Step-by-step explanation: an x intercept is when y is 0

Answer:

(0, -10), (2, 0), (-2, -50)

Step-by-step explanation:

Plug in numbers for the x and solve for it

I will start with 0

y = 5(0 - 1)^2 - 5

y = 5(-1) - 5

y = -5 - 5

y = -10

2

y = 5(2 - 1)^2 - 5

y = 5(1) - 5

y = 5 - 5

y = 0

-2

y = 5(-2 - 1)^2 - 5

y = 5(-9) -5

y = -45 - 5

y = -50

You just keep plugging in numbers until your graph finds its shape. Of course, you can chart the numbers I have already found.

Answer:

scale facror:

1

:

2

x = 5

Perimeter = 5+4+4+5+6 = 24

Answer:

10 windows

Step-by-step explanation:

2.5x2.5=6.25 then you would do 64 divided 6.25 to get 10.24 which would give you 10 whole windows.

Answer:

4.0 meters, ∠C = 39°, ∠A = 51°

Step-by-step explanation:

Firstly, our diagram shows us that the given triangle is actually a right triangle. So we can use the Pythagorean Theorem to solve for the height of the chain:

[tex]a^{2} +b^{2} =c^{2}[/tex]

[tex](3.3)^{2} +b^{2} =(5.2)^{2}[/tex]

[tex]b^{2} =(5.2)^{2}-(3.3)^{2}[/tex]

[tex]b =\sqrt{(5.2)^{2}-(3.3)^{2}}[/tex]

[tex]b=4.0187...[/tex]

[tex]b=4.0 m[/tex]

Now, we can use the Law of Cosines to figure out one of the acute angles:

[tex]c^{2} =a^{2} +b^{2} -2ab(cos(C))[/tex]

[tex](3.3)^{2} =(4.0)^{2} +(5.2)^{2} -2(4.0)(5.2)(cos(C))[/tex]

[tex]cos(C)=\frac{(3.3)^{2}-(4.0)^{2} -(5.2)^{2}}{-2(4.0)(5.2)}[/tex]

[tex]C=cos^{-1}( \frac{(3.3)^{2}-(4.0)^{2} -(5.2)^{2}}{-2(4.0)(5.2)})[/tex]

[tex]C=39.3915...[/tex]

∠C = 39°

And since we know that all angles in a triangle add up to 180°:

∠A + ∠B + ∠C = 180

∠A + 90 + 39 = 180

∠A = 180 - 90 - 39

∠A = 51°

However, you should always review any answers on the Internet and make sure they are correct! Check my work to see if I made any mistakes!

Answer:

1. The distance between the points R and U is 4 feet

2. The length of the side between U and T is 3 feet

The length of the side between T and S is 4 feet

The length of the side between S and R is 3 feet

3.The perimeter of the pen is 14 feet

4. Yes

Liu has enough fence to make the Pen because he has more fence than the perimeter of the pen

Step-by-step explanation:

The 'x', and 'y' (x, y) coordinates of the points are;

R(5, 7), U(5, 3), S(8, 7), T(8, 3)

1. From the graph, the distance between the points R and U is given by the change in the values of the y-coordinate, given in feet, since the x-coordinate values are the same

Therefore, the distance between the points R and U = 7 ft. - 3 ft. = 4 ft.

2. Similarly, the length of the side between U and T is given by the change in the values of the x-coordinate, given in feet, since the y-coordinate values of U ant T are the same, as follows;

The length of the side between U and T = 8 ft. - 5 ft. = 3 ft.

Similarly the length of the side between T and S which have the same x-coordinate values is given as follows

The length of the side between T and S = 7 ft. - 3 ft. = 4 ft.

The length of the side between S and R which have the same y-coordinate values is given as follows;

The length of the side between S and R = 8ft. - 5ft. = 3ft.

3. The perimeter of the pen = Length R and U + Length U and T + Length T and S + Length S and R

∴ The perimeter of the pen = 4 ft. + 3 ft. + 4 ft. + 3 ft. = 14 ft.

4. The length of fencing Liu has = 16 feet (from internet source)

Therefore, the length of fence Liu has, 16 ft.is more than the length that make up the perimeter of the pen, 14 ft.

Therefore Liu has enough fence to make the Pen because the length of fence he has is more than the perimeter of the pen.

Answer: 3 quarts of coffee.

Step-by-step explanation:

A coffee mug can take 16 fluid ounces.

Annie needs to fill up 6 mugs so the total ounces needed for 6 mugs would be:

= 16 * 6

= 96 fluid ounces

As the answer needs to be in quarts, convert the above.

1 quart = 32 fluid ounces

96 fluid ounces = 96/32

= 3 quarts

Answer:

C≈18.85

Step-by-step explanation:

Answer:

Step-by-step explanation:

(2x^2-32)/(x^2 + 10x + 24) is less subject to misinterpretation.  Write these factors in a vertical column:

     (2x^2-32)

------------------------- and then factor numerator and denominator separately:

(x^2 + 10x + 24)

   2(x^2 - 16)         2(x - 4)(x + 4)       2(x - 4)

--------------------- = --------------------- = ----------------     Note:  This is good ONLY

(x + 4)(x + 6)          (x + 4)(x + 6)           x + 6            for x ≠ -4!  Division by

                                                                                 is not defined.

[tex]{ \dashrightarrow{ \sf { \red{ \frac{2 {x}^{2} - 32}{ {x}^{2} + 10x + 24}}} } } \\ \\ \\ { \dashrightarrow{ \sf{ \red{ \frac{2( {x}^{2} - 16)}{ {x}^{2} +(6x+4x) +24}}}}} \\ \\ \\ { \dashrightarrow{ \sf{ \red{ \frac{2(x + 4)(x - 4)}{ {x}^{2} + 6x + 4x +24}}}}} [/tex]

[tex]{ \dashrightarrow{ \sf{ \red{ \frac{2(x + 4)(x - 4}{ x(x+6)+4(x+6)}}}}} \\ \\ \\

{ \dashrightarrow{ \sf{ \red{ \frac{2(x + 4)(x - 4)}{(x+6)(x+4)}}}}} \\ \\ \\

{ \dashrightarrow{ \sf{ \red{ \frac{2(x - 4)}{ (x-6)}}}}} [/tex]

Answer:

288

Step-by-step explanation:

Brainliest pls

Answer:

9X8X4= 288.

Break it down. 9X8=72. 72X4=288.

Step-by-step explanation:

Answer:

A and B

Step-by-step explanation:

Answer:

golf ball striking the ground is a collision.

The ground exerts an equal force on the golf ball. y-step explanation:

PLATO

Answer:

9 cm

Step-by-step explanation:

r = 3cm

Volume of cone = 27π cm³

[tex]\frac{1}{3}\pi r^{2}h=27\pi \\\\\frac{1}{3}*\pi *3*3*h=27\pi \\[/tex]

                   h   = [tex]\frac{27\pi *3}{\pi *3*3}\\[/tex]

                    h = 9 cm

Answer:

subtract to elimanate x.

Step-by-step explanation:

Brainliest pls??

Answer:

2 ounces of nuts are needed to make one cake.

Step-by-step explanation:

if he uses 1.4 to make 1/8 of a cake, then you need to do it 8 times to make a full cake. Multiply 1/4 * 8 which is equal to 8/4 which simplifies to 2. This is your answer!

2 ounces of nuts are needed to make one cake.

Answer:

-35/8=t

Step-by-step explanation:

-7/4=2/5t

simplify by dividing each side by 2/5

-35/8=t