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3 years ago

Plzzz help me on this math problem

Mathematics

1 answer:

Lostsunrise [7]3 years ago

3 0

Hi there!

Amit's reasoning is incorrect because multiplying a positive number by a negative number results in a negative result. The question also says that it is a charge to his account, which means that money is being taken away. Therefore, Amit's reasoning is incorrect because the bank is taking away money from him and his equation results in a positive value, instead of negative.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!

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Which algebraic expression is equivalent to the expression below?

kenny6666 [7]

Answer:

C. 4( 2x+1 )

Step-by-step explanation:

12x+4-4x = 8x+4

A. 8(x + 1) = 8x+8

B. 4(2x - 1) = 8x-4

C.4(2x + 1) = 8x+4

D. 4(x + 1) = 4x+4

5 0

3 years ago

If there are 3 hearts and 2 stars what is the value of ONE star?

Nikolay [14]

1.5

Explanation: 3 is total. You have two stars. 1.5+1.5=3

8 0

3 years ago

can someone help me with these??? I really appreciate it!!! I did one of them already. ( if the first one is wrong can someone p

Anestetic [448]

Answer:

the answer to your questions are below

Step-by-step explanation:

1.-

x = 3x - 60

3x - x = 60

2x = 60

x = 30

A = 30

2.-

- x + 26 = 2x - 10

2x + x = 26 + 10

3x = 36

x = 36/3

x = 12

D = 2(12) - 10

D = 24 - 10

D = 14

3.-

5x + 10 = 7x - 12

7x - 5x = 10 + 12

2x = 22

x = 22/2

x = 11

4.- 4x + 7 = 5(x - 4)

4x + 7 = 5x - 20

5x - 4x = 7 + 20

x = 27

5.- 6(x - 2) = 3x + 30

6x - 12 = 3x + 30

6x - 3x = 30 + 12

3x = 42

x = 14

DHG = 6(14 - 2)

DHG = 6(12)

DHG = 72

7 0

3 years ago

Tienes un triángulo equilátero con lados de 10cm, lo divides en dos partes de manera horizontal tal que el área de ambos figuras

Tanya [424]

Answer:

x = 10/√2 ≈ 7.07

Step-by-step explanation:

Comenzaremos por dividir el triángulo en dos partes y definir H, como en la figura adjunta.

Aplicando el teorema de Tales, sabemos que:

$\dfrac{l/2}{H}=\dfrac{x/2}{h}\\\\\\\dfrac{l}{H}=\dfrac{x}{h}$

También sabemos que, dado que el tirángulo menor es la mitad que el triángulo mayor, la relación entre áreas es:

$\dfrac{A}{A_x}=\dfrac{lH/2}{xh/2}=\dfrac{lH}{xh}=2$

Dado que formamos dos triángulos rectángulos, podemos despejar el valor de H como:

$(l/2)^2+H^2=l^2\\\\H^2=l^2-(l/2)^2=10^2-5^2=100-25=75\\\\H^2=\sqrt{75}$

Podemos entonces despejar x de la siguiente manera:

$h=\dfrac{H}{l}\cdot x=\dfrac{lH}{2x}\\\\\\2x^2\dfrac{H}{l}=lH\\\\\\2x^2=l^2\\\\\\x=\dfrac{l}{\sqrt{2}}=\dfrac{10}{\sqrt{2}}\approx7.07$

6 0

4 years ago

Find the sum of QR<br> 4x+33

12345 [234]

Answer:

Step-by-step explanation:

Simplifying

4x + 5 = 33

Reorder the terms:

5 + 4x = 33

Solving

5 + 4x = 33

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5' to each side of the equation.

5 + -5 + 4x = 33 + -5

Combine like terms: 5 + -5 = 0

0 + 4x = 33 + -5

4x = 33 + -5

Combine like terms: 33 + -5 = 28

4x = 28

Divide each side by '4'.

x = 7

Simplifying

x = 7

4 0

3 years ago