(7a^2 -a + 4) – (3a^2 - 4a - 3)

Answer:

289819

Step-by-step explanation:

Answer:

the length of a room is 2 m longer than its breadth .if the area of its floor is 63 sq.m.calculate the length and the breadth of the room

Length and breadth

Let the length and breadth be l + 2 and l

Now,

[tex] \large \sf \: Area = l + 2 \times l [/tex]

[tex] \large \sf \: 63 = l + 2 \times \: l[/tex]

[tex] \large \sf \: 63 = 2l + {l}^{2} [/tex]

[tex] \large \sf \: {l}^{2} + 2l - 63 = 0[/tex]

[tex] \large \sf \: {l}^{2} (9l - 7l) - 63 = 0[/tex]

[tex] \large \sf \: l(l + 9) - 7(l + 9)[/tex]

Either

[tex] \large \sf \: l = - 9[/tex]

or,

[tex] \large \sf \: l = 7[/tex]

Length can't be negative,

So,

L = 9

B = 7

Please mark as brainliest :)

Answer:

bc=eb and ca=fa

please tell me if this is actually the right answer

Step-by-step explanation:

bc=eb and ac=fa is wrong

bc=eb and ca=fa is right

cb=eb and ac=fa is wrong

ba=eb and ab=fa is wrong

Answer:

She tipped $25.50 and paid a total of $110.50

Step-by-step explanation:

hope this helps you out

Answer:

If AB is 16, then AD is 8.

If AB = 12 and CB = 10, then the height of the triangle is 8.

Step-by-step explanation:

AD = [tex]\frac{AB}{2}[/tex], so AD is equal to 8.

Use the Pythagorean Theorem, [tex]\sqrt{10^{2} - 6^{2}}[/tex] equals 8, so the height of the triangle is equal to 8.

Answer:

-1x(13v+9z+2)

Step-by-step explanation: try solve this :)

Answer

-17v-9z+2

Step-by-step explanation:

First collect the like terms

-4v-4v-9v-9z+2

-17v-9z+2

Since we can no longer add up due to they are unlike term. Therefore our answer is -17v-9z+2

Answer: I believe the answer is 3.07 but I may be wrong so if you want you can wait for another answer :D

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

here's the right answer- someone on a different website said the same weird thing as the person before me smh

Step-by-step explanation:

If the total weight of the box is 15 lb, then the weight of the apples is 13.5 lb.

Option (2) is correct.

Equation: A declaration that two expressions with variables or integers are equal. In essence, equations are questions, and attempts to systematically identify the solutions to these questions have been the driving forces behind the creation of mathematics. Simple algebraic equations with merely addition or multiplication to differential equations, exponential equations with exponential expressions, and integral equations are examples of different types of equations. They are employed to represent a number of physics laws.

As per the given data:

The table shows the total weight of the box and the weight of the apples.

From the table:

Total weight of the box - weight of apples = weight of box

7.5 - 6 = 1.5 lb

10 - 8.5 = 1.5 lb

12.5 - 11 = 1.5 lb

If the total weight of the box is 15 lb and the weight of the apples is 13.5 lb

15 - 13.5 = 1.5 lb {weight of box}

Which satisfies the data in the table.

Hence, If the total weight of the box is 15 lb, then the weight of the apples is 13.5 lb.

To learn more about equation, click:

brainly.com/question/10413253

#SPJ2

(The given question is incomplete, the complete question is given below)

Answer: 48

Step-by-step explanation:

Each is 8x? So 8x1, 8x2 so on, then you get 48!

Answer:

Step-by-step explanation:

Here you go mate

Step 1

14−3x<−1  Question

Step 2

14−3x<−1  Simplify

Step 3

14−3x<−1   Subtract 14 from sides

-3x<-15

Step 4

-3x<-15  Divide sides by -3

x>5

Answer

x>5

Hope this helped

Answer:

Step-by-step explanation:

I can help

Step 1

14−3x<−1  Simplify

Step 2

14−3x<−1  subtract 14 from the sides

-3x<-15

Step 3

-3x<-15  Divide the sides by 3

-3x/-3<-15/-3

Answer

x>5

Hope this helps

Answer:

x = 49

Step-by-step explanation:

Given

[tex]\frac{x-16}{x+6}[/tex] = [tex]\frac{3}{5}[/tex] ( cross- multiply )

5(x - 16) = 3(x + 6) ← distribute parenthesis on both sides

5x - 80 = 3x + 18 ( subtract 3x from both sides )

2x - 80 = 18 ( add 80 to both sides )

2x = 98 ( divide both sides by 2 )

x = 49

Answer:

x = - 49

Step-by-step explanation:

Solve for X by cross multiplying.

Answer:

-3

Step-by-step explanation:

Answer:

Non Linear

Step-by-step explanation:

Its non-linear because when you put X to the second power, it will change the function into a quadratic function

Answer:

using formula y2-y1/x2-x1, x1= -6,x2= o, y1= 5,y2= 4

Step-by-step explanation:

4-5/0-(-6)

-1/0+6

-1/6

is your answer

Answer:

4

Step-by-step explanation:

Answer:

The area is 60. Thats all I know TwT

Step-by-step explanation:

Answer:

Step-by-step explanation:

y = (x-3)²-1

This is the equation for an up-opening parabola with vertex (3,-1).

Find the x-intercepts:

0 = (x-3)²-1

(x-3)² = 1

x-3 = ±1

x = 4, 2

The graph crosses the x-axis at (4,0) and (2,0).

Find the y-intercept:

y = (0-3)²-1 = 8

The graph crosses the y-axis at (0,8).

Plot your four points (3,-1), (4,0), (2,0), (0,8). Draw an up-opening parabola through the points.

Answer:

1.63

Step-by-step explanation:

Answer:

1.63

Step-by-step explanation:

Answer:

A: 2,400 yards is needed for the child's sweater

B: HAT: 800 yards

   SCARF: 400 yards

   SWEATER: 2,400 yards

Step-by-step explanation:

i really hope this helped! if it did please give me brainliest.

Answer:

2

Step-by-step explanation:

Find the diagram attached

The Base of the triangle will be equivalent to the the length of the rectangle

Since the base of the triangle is 5units, hence length of the rectangle is 5units

Similarly, the height of the triangle is corresponding to the width of the rectangle

Since the height of the triangle is 2 units, the rectangle will be 2 unts wide. Hence the required answer is 2units

Answer: i don't think they do

Step-by-step explanation: tell me if i wrong

Answer:

Sean dos números A y B.

Sabemos que la suma de estos dos números es igual a 5, entonces:

A + B = 5

Y sabemos que el doble de uno mas el doble del otro da como resultado 15.

entonces:

2*(A + 2*B) = 15

esta es la única forma de interpretar esta ecuación, si en lugar de esta expresión tuviéramos 2*A + 2*B = 15 (pues tambien se puede interpretar como esto), entonces:

tenemos dos ecuaciones:

A + B = 5

2*A + 2*B = 15

Ahora, si sacamos el 2 como factor común en la segunda ecuación tenemos:

2*(A + B) = 15

si dividimos ambas partes por 2:

(A + B) = 15/2 = 7.5

(A + B) = 7.5

Esto se contradice con la primer ecuación:

(A + B) = 5.

Entonces podemos concluir que dichos números no existen.

Dejando esto de lado, nuestras ecuaciones van a ser:

A + B = 5

2*(A + 2*B) = 15

Para resolver esto, el primer paso es aislar una de las variables en una de las ecuaciones, yo voy a aislar A en la primera:

A = 5 - B

Ahora podemos reemplazar esto en la otra ecuación:

2*(5 - B + 2*B) = 15

2*(5 + B) = 15

10 + 2*B = 15

2*B = 15 - 10 = 5

B = 5/2 = 2.5

Y con la primer ecuación:

A + B = 5

reemplazamos el valor de B:

A + 2.5 = 5

A = 5 - 2.5 = 2.5

Ambos números son 2.5.

Answer:

WYM

Step-by-step explanation:

Answer:

6.16 is the answer

Step-by-step explanation:

3 + (.4^2 + 3)

3 + 3.16

6.16

Answer (assuming the question allows it to be written in slope-intercept form):

[tex]y = -\frac{3}{5} x-\frac{9}{5}[/tex]

Step-by-step explanation:

1) First, find the slope of the equation. Use the slope formula [tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex], substitute the given points' x and y values, and simplify:

[tex]m = \frac{(-3)-(0)}{(2)-(-3)} \\m =\frac{-3-0}{2+3}\\m = -\frac{3}{5}[/tex]

Thus, the slope is [tex]-\frac{3}{5}[/tex].

2) Now, use the point-slope formula [tex]y-y_1 = m (x-x_1)[/tex] and substitute real values for [tex]m[/tex], [tex]x_1[/tex], and [tex]y_1[/tex].

Since [tex]m[/tex] represents the slope, substitute [tex]-\frac{3}{5}[/tex] in its place. Since [tex]x_1[/tex] and [tex]y_1[/tex] represent the x and y values of a point the line crosses, use the x and y values of any one of the given points to substitute into the formula. (Either one is fine. I chose (2,-3).) Then, isolate y to put it into slope-intercept form and find the answer:

[tex]y-(-3) = -\frac{3}{5} (x-(2))\\y + 3 = -\frac{3}{5} x + \frac{6}{5} \\y = -\frac{3}{5} x - \frac{9}{5}[/tex]

Answer:

y = -3

Step-by-step explanation:

Point form: (2,3) and x=2 and y=3