Uhh I’m doing math work and I need help! I’m doing Solve the system of linear equations using substitution. And I have this problem and I keep getting -6 for y but the right answer for y is positive 6; can someone tell me what I’m doing wrong?!?

Hope this help!!!!!!! :)

Quantity of flour needed to make 20 pancakes =

Then , number of pancakes that can be made from 1 cup of floor :-

.

Therefore , 12 pancakes can be made from 1 cup of floor .

Solution (b) :-

Number of pancakes that can be made with 1 cup of flour = 12 pancakes

Number of pancakes that can be made with 9 cups of flour :-

= 9 × 12

= 108 pancakes

Therefore , I can make 108 pancakes with 9 cups of flour .

Solution (c) :-

Yes , I have enough flour to make 100 pancakes . I say this because :-

With one cup of flour I can make = 12 pancakes

With 9 cups of flour I can make =

= 9 × 12

= 108 pancakes

As I can make 108 pancakes with 9 cups of flour , I can conclude that I have enough flour to make 100 pancakes .

Step-by-step explanation:

Answer:

Step-by-step explanation:

The standard form of a circle is

[tex](x-h)^2+(y-k)^2=r^2[/tex] with the really important part being the x- and the y-. If our first set of parenthesis is

[tex](x+9)^2[/tex], by the definition of the standard form of a circle, it actually is

[tex](x-(-9))^2[/tex] which is obviously negative (that's the h of the center of the circle);

If our second set of parenthesis is

[tex](y+5)^2[/tex], by the definition of the standard form of a circle, it actually is

[tex](y-(-5))^2[/tex] which is obviously negative (that's the k of the center of the circle). The radius is the square root of the constant on the right, 64. The square root of 64 is 8, so

Center (-9, -5), radius 8

Answer:

Negative

Step-by-step explanation:

Positive discriminant: graph cuts x axis twice

Zero discriminant: graph touches x axis once

Negative discriminant: graph does not cut or touch x axis

Answer:

2(x-2) ≤ -30

Step-by-step explanation:

2(twice) (x-2)( the difference of a number and 2) ≤ (is at most )-30

Answer:

14 + 5[tex]\sqrt{3}[/tex]

a = 14, b = 5, c = 3

Step-by-step explanation:

Multiply the brackets out:

[tex](2\sqrt{3} )(3\sqrt{3} ) = (2)(3)(\sqrt{3})(\sqrt{3}) = (6)(3) = 18[/tex]

[tex](2\sqrt{3} -1)(4+3\sqrt{3} ) = 8\sqrt{3} +18 - 4 - 3\sqrt{3}[/tex]

[tex]= 14 + 5\sqrt{3}[/tex]

Answer:

x = 42-degrees

Step-by-step explanation:

x + 48 = 90 --> *subtract 48 from both sides*

x = 42

Answer:

42

Step-by-step explanation:

Because the entire angle is equal to 90, you have to find 90-48 which is 42.

Answer: about 2 times greater

Step-by-step explanation:

Answer:

She needs at least a 105 to get a 90 :/

Step-by-step explanation:

If you add all those up and divide it by 5 (the mean) you get an 86.5, then if you add 105 and divide up all those numbers by 6 you get a 90.166667

Answer:

I wasn't sure how you're supposed to answer, so the answers for each scenario are in the explanation!

Step-by-step explanation:

[tex]A=\pi r^{2}[/tex]

[tex]A=\pi (6^{2})[/tex]

[tex]A=\pi (36)[/tex]

From here, there can be a few different answers:

The exact answer is A=36π inches^2.

If you need to round, round this to wherever you need it: A=113.0973355292326... inches^2

If you're using 3.14 for pi, the answer is A=113.04 inches^2.

Answer:

Center: (-1,-3)

Radius: 4.12 units

Step-by-step explanation:

Hi there!

1) Find the center of the circle

When given two diameter endpoints, we can find the center of the circle by calculating for the midpoint since the center lies in the middle of the points:

Midpoint: [tex](\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2})[/tex] where the two points are [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]

Plug in the diameter endpoints (3,-2) and (-5,-4)

[tex](\frac{3+(-5)}{2} ,\frac{-2+(-4)}{2})\\(\frac{3-5}{2} ,\frac{-2-4}{2})\\(\frac{-2}{2} ,\frac{-6}{2})\\(-1,-3)[/tex]

Therefore, the circle is centered at (-1,-3).

2) Find the radius of the circle

The radius of a circle is the distance between the outside edge and the center. We can find the radius by calculating for the distance between the center of the circle and one of the diameter endpoints.

Distance formula: [tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex] where the two points are [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]

Plug in the center (-1,-3) and a diameter endpoint (3,-2)

[tex]d=\sqrt{(3-(-1))^2+(-2-(-3))^2}\\d=\sqrt{(3+1)^2+(-2+3)^2}\\d=\sqrt{(4)^2+(1)^2}\\d=\sqrt{16+1}\\d=\sqrt{17} \\d=4.12[/tex]

Therefore, the radius of the circle is approximately 4.12 units when rounded to the nearest hundredth.

I hope this helps!

Answer:

shrub = $11

hosta = $2

Step-by-step explanation:

Two equations can be derived from the equation

9h + 12s = 150 equation 1

4h + 3s = 41 equation 2

s = shrubs

h = hostas

this question can be solved using simultaneous equation

Multiply equation 2 by 4

16h + 12s = 164 equation 3

Subtract equation 1 from 3

7h = 14

h = 2

substitute for h in equation 1

9(2) + 12s = 150

12s = 150 - 18

12s = 132

s = 11

Answer:After choosing the color she still has the choices of brands and style so:

Tahari has 4*3=12 options left.

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

right on edge

Answer:

A = 1.26

B = 1.22

Store B is better

Step-by-step explanation:

5.04 divided by 4

2.44 divided by 2

Answer: 20

Step-by-step explanation:  Substitute -4 in for a and 4 in for x.  Then, simplify.  

4(4) - (-4)

16 + 4

20

Hope this helped.  Please mark brainliest if correct!

Answer:

4(4)-(-4)

16+4

20

Step-by-step explanation:

When you put x is 4 in the first term u will get 16 and when you add two negatives u will get a positive, hence positive 4, that is 16+4

20

Answer:

Obtuse

Step-by-step explanation:

a^2 + b^2 = c^2

10^2 + 11^2 = 16^2

100 + 121 = 256

221 = 256

221 < 256

A triangle has side lengths 10, 16, and 11. is the triangle is obtuse.

Triangles can be classified into three types with respect to their interior angles which are:

1. Acute-angled

2. Obtuse-angled

3. Right-angled

Acute Triangle

An acute triangle is a triangle whose all the three interior angles are acute. In other words, if all interior angles are less than 90 degrees, then it is an acute-angled triangle.

Obtuse Triangle

Obtuse triangles are those in which one of the three interior angles has a measure greater than 90 degrees. In other words, if one of the angles in a triangle is an obtuse angle, then the triangle is called an obtuse-angled triangle.

Right Triangle

A right triangle is a triangle in which one of the angles is 90 degrees. In a right-angled triangle, the side opposite to the right angle (90-degree angle) will be the longest side and is called the hypotenuse.

Three given sides are 10, 11, 16

Let a = 10, b = 11, c = 16

then, [tex]a^{2} +b^{2} = 10^{2} +11^{2}[/tex]

= 100 + 121

= 221

and [tex]c^{2} = 16^{2} =256[/tex]

Since, [tex]a^{2} +b^{2} < c^{2}[/tex]

Thus, given triangle is obtuse.

Find out more information about types of triangles here

https://brainly.com/question/1581660

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Answer:

Aswan, Sudan

Step-by-step explanation:

Answer:

egypt and africa

Step-by-step explanation:

Answer:

the no of puppets that could be made with his string is 21

Step-by-step explanation:

Given that

There is 7 yards

And, it needs one -third of string for each of his puppets

= 7 × 3

= 21 puppets

We simply multiply the 7 yards with the 3 so that the no of puppets could come

hence, the no of puppets that could be made with his string is 21

Answer:

[tex]\frac{(x-4)^2}{49}+\frac{(y-4)^2}{24}=1[/tex]

Step-by-step explanation:

Because the vertices are on the same horizontal line and so are our foci, this is our major axis for a horizontal ellipse.

Horizontal Ellipse:

[tex]\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1[/tex]

a>b

Major axis length: 2a

Minor axis length: 2b

Center: (h,k)

Foci: (h±c,k) where a²-b²=c²

We can easily find the center of the ellipse by finding the midpoint of our vertices (-3,4) and (11,4) which works out to be (4,4)

Because our foci must be (-1,4) and (9,4) this means (4±c,4) represents our foci. We can easily see that c=5 since (4-5,4) -> (-1,4) and (4+5,4) -> (9,4).

Knowing that c=5, we need to determine our values for a and b to satisfy the equation a²-b²=5². Our vertices are located on the major axis, which will help us in finding the value of a. The distance between the two vertices will be the length of the major axis, which will be |11-(-3)| = 14. Additionally, because the length of the major axis is equal to 2a, this means 2a=14 where a=7. Now we can solve for b with our equation 7²-b²=5² where b=√24.

In conclusion, our ellipse would be:

[tex]\frac{(x-4)^2}{7^2}+\frac{(y-4)^2}{\sqrt{24}^2}=1[/tex]  which works out to be [tex]\frac{(x-4)^2}{49}+\frac{(y-4)^2}{24}=1[/tex]

The equation of ellipse with  vertices (-3, 4), (11, 4) and foci (-1, 4), (9.4) is

(x-4)^2/49 + (y-4)^2/24 = 1

The standard equation of an ellipse centered at (h, k) with a major axis parallel to the x-axis is given by:

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

where the coordinates of the vertex are (h±a, 0), coordinates of co-vertex are (h, k ± b) and the coordinates of foci are (h±c, k), where a² = c² + b².

here, we have,

Because the vertices are on the same horizontal line and so are our foci, this is our major axis for a horizontal ellipse.

Horizontal Ellipse:

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

where,

a>b

Major axis length: 2a

Minor axis length: 2b

Center: (h,k)

Foci: (h±c,k) where a²-b²=c²

We can easily find the center of the ellipse by finding the midpoint of our vertices (-3,4) and (11,4) which works out to be (4,4)

Because our foci must be (-1,4) and (9,4) this means (4±c,4) represents our foci. We can easily see that c=5 since (4-5,4) -> (-1,4) and (4+5,4) -> (9,4).

Knowing that c=5, we need to determine our values for a and b to satisfy the equation a²-b²=5².

Our vertices are located on the major axis, which will help us in finding the value of a.

The distance between the two vertices will be the length of the major axis, which will be |11-(-3)| = 14.

Additionally, because the length of the major axis is equal to 2a, this means 2a=14 where a=7.

Now we can solve for b with our equation 7²-b²=5² where b=√24.

In conclusion, our ellipse would be:

 (x-4)^2/49 + (y-4)^2/24 = 1

To know more about equation of ellipse visit

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As a block of ice melts, its weight changes from 1 3/4 lb to 1/4 lb. This change takes 1/4 h. The ice melts at a constant rate. At what rate does the weight of the ice change?

You should have these values backwards like:-

=>  1/34 lb is less than 1/4 lb.

Next:-

We're gonna find a specific common denominator,

Then we get: (17/68 - 2/68)/(1/4) = 60/68 = 15/17 lb/hour

___________________________

[tex]\huge{ \mathfrak{ \underline{ Answer}}} \: \: ✓ [/tex]

____________________________

Change in weight :

_____________________________

Time taken to melt :

_____________________________

Rate of change in weight of ice :

The rate of change in weight of Ice is 6 lbs per hour ( 6 lb / h )

_____________________________

[tex]\mathrm{ \#TeeNForeveR}[/tex]

Answer:

7/x+2

Step-by-step explanation:

2x +7/x

hope this helps

IT IS OVER ALL NOT ONLY 7!!!!!!!

Answer:

I think or maybe if you want me to say this the given series is a geometric one with fert term, -3 and common ratio -1

Step-by-step explanation:

I am so sorry if this is not what you meant I apologize

Given:

The expressions are:

[tex](5x-3y)[/tex] and [tex](8x+8y)[/tex]

To find:

The difference of [tex](5x-3y)[/tex] and [tex](8x+8y)[/tex].

Solution:

Difference of [tex](5x-3y)[/tex] and [tex](8x+8y)[/tex] is written as:

[tex]Difference=(5x-3y)-(8x+8y)[/tex]

On simplification, we get

[tex]Difference=5x-3y-8x-8y[/tex]

[tex]Difference=(5x-8x)+(-3y-8y)[/tex]

[tex]Difference=-3x-11y[/tex]

Therefore, the difference of [tex](5x-3y)[/tex] and [tex](8x+8y)[/tex] is [tex]-3x-11y[/tex].

Answer:

Answer:

3.5 and -3.5

Step-by-step explanation:

because of absolute value -3.5 counts as answer.

1. To find the original number divide the given number by the percentage ( written as a decimal)

5 / 0.67 = 7.462686567

Round the answer as needed.

2. Divide the smaller number by the larger number then multiply by 100 to get percent:

43.8 / 52 = 0.8423076923

0.8423076923 x 100 = 84.23076923%

Round answer as needed.

5. Multiply the given number by the percent( written as a decimal)

152 x 1.8 = 273.6

Answer:

225, 256, 441, 484

Step-by-step explanation:

Only square numbers can have an odd number of factors, e.g. 4: 1, 2, 4

Therefore only square numbers can have 9 factors.

There are only 8 square numbers between 200 and 500: 225, 256, 289, 324, 361, 400, 441, 484.

One way is to list all the factors of each number and you will find that only 225, 256, 441 and 484 have 9 factors.

The other more efficient way is to acknowledge the fact that if a square number (n x n) has 9 factors, n must have only 4 factors. For example, 225 has 9 factors because it is equal to 15 squared and 15 only has 4 factors: 1, 3, 5, 15.

This way, we can find out that 15, 21 and 22 have exactly 9 factors. However, 256 has 9 factors as well as it is equivalent to 2 to the power of 8. This means that it already has 8 factors: 2, 4, 8, 16...,128, 156. However, we must include 1 as a factor which means it has 9 factors in total as well.

Answer: 2,4???

Step-by-step explanation:

Answer:

A and E.

Step-by-step explanation:

Its square root of [(13-8 and 7 - - 2  ( = 7 + 2)both squared)]

OH I see there are 2 answers.

The other one is  A.