If x+y = b and −x+3y=a, then what is y?

Step-by-step explanation:

x²+4-4x+y²=3

x²+y²-4x+1=0

Answer:

?? Bro write the question better

Step-by-step explanation:

Answer:

Length = 30 inches

Width = 24 inches

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Perimeter of a rectangle (P) = 2 width + 2 length

Since:

Length (L) = width (w) + 6

Replacing with the values given:

108 = 2w+2 (w+6)

Solving for w:

108 = 2w+2w+12

108-12 =2w+2w

96 =4w

96/4 =w

w= 24 in

Replacing w in the length formula:

L = w+6

L= 24+6 = 30in

Feel free to ask for more if needed or if you did not understand something.  

Answer:

9 M

Step-by-step explanation:

a^2+b^2=c^2

12^2+b^2=15^2

144+b^2=225

-144         -144

b^2=81

b=sqrt of 81

b=9

Answer:

Replication

Step-by-step explanation:

Replication meaning it's going to be repeated, also it said replication was right on a-pex

Answer:

8/18

Step-by-step explanation:

8 out of 18 attractions at the park are arcades, as stated.

hope this helps!

Answer:

120

Step-by-step explanation:

This shape is made out of two figures, a rectangle with sides 20 and 3.5 and a parallelogram with height 2.5 and base 20. 2.5*20+20*3.5=50+70=120 cubic centimetres. Hope this helps!

Answer:

D

Step-by-step explanation:

We are given

b^3

and

b=5

We are given what b is equal to, 5. Therefore, we can substitute 5 in for b

5^3

Evaluate the exponent. 5^3 is the same as multiplying 5, 3 times.

5*5*5

25*5

125

Therefore, D, 125 is the correct answer

Answer:

7 3/10

pls mark!!!!!!!!!!!!!!

Answer:

7

Step-by-step explanation:

just subtract 7 from largest number down to smaller numbers to notice the pattern. :)

Answer:

There is no plug-in for x.

X=0.

(0+4) - (0-1) = [(4 - (-1)] = 5.

Answer:

5

Step-by-step explanation:

(x+4) -x +1

x - x = 0

5

Answer:

12

Step-by-step explanation:

420/35

12

12*35=420

Answer:

The corresponding base is 12 cm.

Step-by-step explanation:

The area of a parallelogram is calculated with the formula of A=bh, where b is the base and h is the height.

You can apply the problem to the formula:

420=b(35)

To solve, work backwards.

Divide 35 to both sides.

420 divided by 35 is 12

b=12

Hope this helps!

Answer:

[tex]\frac{3}{5}[/tex]

there are five shapes total

3 triangles and 2 pentagons

sense there are 3 triangles she will have a probability of 3 over 5

What are ways that pioneer species differ from climax communities? Check all that apply.

Step-by-step explanation:

you add the total number of objects in this case shapes

and that is the denomantor

then what ever the object is in this case shapes that is your numerator

Answer:

64 cm^2

Step-by-step explanation:

Square: 4*4 = 16

Triangles: 4((4*6)/2))

       = 4(24/2)

       = 4(12)

       = 48

Add the square and triangles together

       = 16 + 48

       = 64

The total will be 64 cm^2

Answer: 64 cm2

Step-by-step explanation:

Answer:

90

Step-by-step explanation:

Answer:

90

Step-by-step explanation:

The reason why it is 90 because it looks like it is going in order so it would be 55 , 90 , 92 , 114

Answer:

C. [tex]c = \frac{-7+-\sqrt{129} }{8}[/tex]

Step-by-step explanation:

Before we start, you can think of the variable "c," as x.

The quadratic formula/equation is:

[tex]x = \frac{-b+-\sqrt{b^2-4ac} }{2a}[/tex]

The setup is:

[tex]ax^2+bx+c=0[/tex]

[tex]4c^2+7c-5=0[/tex]

Plug in the numbers accordingly to the letter associated, like so:

[tex]x = \frac{-7+-\sqrt{7^2-4(4)(-5)} }{2(4)}[/tex]

[tex]x = \frac{-7+-\sqrt{49+80} }{8}[/tex]

[tex]x = \frac{-7+-\sqrt{129} }{8}[/tex]

Answer:

B

Step-by-step explanation:

B-X=A

or

B-A=X

or

X=B-A

[tex]X=\left[\begin{array}{ccc}-5&-1&6\\4&1&2\\0&-3&2\end{array}\right] -\left[\begin{array}{ccc}-1&-2&3\\4&8&-6\\0&1&5\end{array}\right] \\=\left[\begin{array}{ccc}-5+1&-1+2&6-3\\4-4&1-8&2+6\\0-0&-3-1&2-5\end{array}\right] \\=\left[\begin{array}{ccc}-4&1&3\\0&-7&8\\0&-4&-3\end{array}\right][/tex]

Answer:

answer is B

Step-by-step explanation:

Answer: 3.21%

Step-by-step explanation:

Interest = (1/t)(A/P - 1)

Step-by-step explanation:

Parallel lines have the same slope, so we know that our line will have a slope of 3 because y = 3x + 9 has a slope of 3. Now, we can use the point-slope formula of the line to find the equation.

We have y - y₁ = m (x - x₁)          (m = 3, x₁ = 2, y₁ = -2)

               y- (-2) = 3 (x - 2)

               y + 2 = 3x - 6

               y = 3x - 8

Hope this helps!

Answer:

y = 3x - 8

Step-by-step explanation:

We know that parallel lines have the same gradient. In this situation we want want to work the equation of the line that is parallel to y = 3x + 9 and passes through ( 2 , - 2 ). We know that equations of lines usually go in the format of    y = mx + c

↔ Where 'm' is the gradient / slope

↔ Where 'c' is the y - intercept

Using the information in the first sentence we can set up an equation to find the value of 'c'

⇒ Form the equation

→ y = 3x + c

⇒ Substitute ( 2 , -2 ) into the equation to find the value of c

→ -2 = 6 + c

⇒ Minus 6 from both sides to isolate c

→ -8 = c

⇒ Put the value of c back into y = 3x + c

→ y = 3x - 8

So equation of the line that passes through ( 2, −2 ) and is parallel to the line y = 3x + 9 is y = 3x - 8

Answer: The answer is 12 units

Step-by-step explanation: just finished the unit

Answer:

so it is C

Step-by-step explanation:

a=4

b=5

c=√(4²+5²)=√(16+25)=√41

4+5+√41≈15

Answer:

Is this PSAT or where are u answering this question?

Answer:

2/3

Step-by-step explanation:

By counting the distance from point to point, I got 4 up, 6 to the right, aka 4/6

By simplifying it, I get 2/3!

Hope that helps!

Answer:

2/3 the second one

I hope this helps you

Answer:

31.5 units^2

Step-by-step explanation:

This is a right triangle

The x dimension is from B to C

-4 to 3 is 7 units

The y dimension is from A to B

5 to -4 = 9 units

The area of a triangle is

A = 1/2 bh

A = 1/2 (7)(9)

   = 31.5

Answer:

First one:

31.5 units²

Step-by-step explanation:

AB: 5 - (-4) = 9 units

BC: 3 - (-4) = 7 units

ABC is a right angle triangle with 90° at B

Base: BC

Height: AB

Area:

½ × base × height

½ × 7 × 9

31.5 units²

Answer:

b

Step-by-step explanation:

Answer:

6a   +13

Step-by-step explanation:

(2a + 8) + (4a + 5)

Combine like terms

2a+4a   +8+5

6a   +13

Answer:

6a + 13

Step-by-step explanation:

1. simplify

(2a + 8) + (4a + 5)

2. Reorder the terms

(8 + 2a) + (4a + 5)

3. Remove parentheses

8 + 2a + 4a + 5

4. Combine like terms

8 + 5 = 13

2a + 4a = 6a

So, 6a + 13 is your answer.

Answer:

Potassium Iodide

Step-by-step explanation:

KI (potassium iodide) is a salt of stable (not radioactive) iodine that can help block radioactive iodine from being absorbed by the thyroid gland, thus protecting this gland from radiation injury. The thyroid gland is the part of the body that is most sensitive to radioactive iodine.

I hope this helps. If you have any more questions, please feel free to post them and someone will be able to help you, whether it's myself or others. Please leave a like, rating, and if possible, Brainliest. Have a great day!

Answer:

x=10t+25

Step-by-step explanation:

The delivery fee is 25 dollars and each shirt is 10 dollars

Answer:

P(Snickers n Snickers)  = [tex]\frac{2}{51}[/tex]

Step-by-step explanation:

Given

Bag of candy

5 Reese's Peanut Butter Cups,

4 Snickers

3 Sour Patch

6 Skittles

Required

Calculate P(Snickers n Snickers)

To solve this question, it'll be assumed that you and your friend selected snickers at a consecutive time.

First, we need to calculate the total number of candy

Total = 5 + 4 + 3 + 6

Total = 18 candies

P(Snickers n Snickers) means P(Snickers and Snickers);

i.e. the probability of selecting snicker twice

Number of snickers = 4;

So, the probability of you selecting a snicker first is [tex]\frac{4}{18}[/tex]

This is gotten by dividing number of snickers by total candies.

At this point, there are 4 - 1 snickers left and there are 18 - 1 candies left;

So, the probability of your friend selecting a snicker is [tex]\frac{4 - 1}{18 - 1}[/tex].

So, P(Snickers n Snickers)  = [tex]\frac{4}{18}[/tex] * [tex]\frac{4 - 1}{18 - 1}[/tex]

P(Snickers n Snickers)  = [tex]\frac{4}{18}[/tex] * [tex]\frac{3}{17}[/tex]

P(Snickers n Snickers)  = [tex]\frac{2}{9}[/tex] * [tex]\frac{3}{17}[/tex]

P(Snickers n Snickers)  = [tex]\frac{2}{3}[/tex] * [tex]\frac{1}{17}[/tex]

P(Snickers n Snickers)  = [tex]\frac{2}{51}[/tex]

Hence, the probability of you and your friend choosing snickers is [tex]\frac{2}{51}[/tex]