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LiRa [457]
3 years ago
8

Which expressions are equivalent to 2 (three-fourths x + 7) minus 3 (one-half x minus 5)? Check all that apply.

Mathematics
2 answers:
SOVA2 [1]3 years ago
8 0

Answer:

29

Step-by-step explanation:

2 [(3/4)x + 7] - 3 [(1/2)x -5)]

2(3/4)x + 2(7) - [ 3(1/2)x - 3(5)]

3/2x + 14 - [ 3/2x - 15 ]

3/2x + 14 - 3/2x + 15

3/2x - 3/2x + 14 + 15

= 29

lorasvet [3.4K]3 years ago
3 0

Answer:

one two and three

Step-by-step explanation:

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In what interval is the function f(x)=squareroot x^2+5x+4 defined
KatRina [158]

9514 1404 393

Answer:

  (-∞, -4] U [-1, ∞)

Step-by-step explanation:

The quadratic expression factors as ...

  x^2 +5x +4 = (x +4)(x +1)

The zeros of this expression are where these factors are zero, at x=-4 and x=-1. The product is negative when one factor is negative and the other is positive, in the region -4 < x < -1. It is non-negative elsewhere. f(x) is defined where the quadratic is not negative, on the union of intervals ...

  (-∞, -4] U [-1, ∞)

7 0
3 years ago
Read 2 more answers
.Un recipiente cilíndrico de 5cm de radio y 10cm de altura se llena de agua. Si la masa del recipiente lleno es de 2kg, ¿cuál es
Lera25 [3.4K]

Answer:

La masa del recipiente vacío es 1,2146 kg.

Step-by-step explanation:

La densidad se define como la propiedad que tiene la materia, ya sean sólidos, líquidos o gases, para comprimirse en un espacio determinado. En otras palabras, la densidad es una magnitud que permite medir la cantidad de masa que hay en determinado volumen de una sustancia. Entonces, la expresión para el cálculo de la densidad es el cociente entre la masa de un cuerpo y el volumen que ocupa:

densidad= \frac{masa}{volumen}

Entonces la masa puede ser expresada como:

masa= densidad*volumen

En este caso:

  • densidad del agua= 1000 \frac{kg}{m^{3} }
  • volumen del recipiente cilíndrico= π*radio²*altura= π*(5 cm)²* 10 cm= π*(0,05 m)²*0,1 m= 7,854*10⁻⁴ m³

Reemplazando:

masa= 1000 \frac{kg}{m^{3} } * 7,854*10⁻⁴ m³

masa=0.7854 kg

Si la masa del recipiente lleno es de 2 kg, entonces se le resta la masa de agua calculada:

2 kg - 0,7854 kg= 1,2146 kg

Entonces,<u><em> la masa del recipiente vacío es 1,2146 kg.</em></u>

<u><em> </em></u>

<u><em></em></u>

8 0
3 years ago
Show workings <br> Due asap please!
Pavlova-9 [17]
Would both of them just be 6?

12/2=6 since it said the centroid
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A brick wall is to form one side of a rectangular garden and three other sides me to be done by 40
kotykmax [81]

Answer:

80 probaly

Step-by-step explanation:

5 0
3 years ago
Use the distributive property to simplify the following expression 4x(x-6)
katrin [286]
We need to distribute the term 4x to x - 6. Basically, we need to multiply 4x by x, which gives us 4x², and 4x by -6, which gives us -24x. Putting our two derived terms together, we get 4x²- 24, which is your answer. Hope this helps and have a great day!
3 0
4 years ago
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