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Pani-rosa [81]
3 years ago
6

The tension t in a spring varies directly with the distance d the spring is stretched. If the

Mathematics
1 answer:
yarga [219]3 years ago
7 0

Answer:

t = 21d

Step-by-step explanation:

Here tension and distance are denoted t by d  and  respectively. Since  t varies directly with d , then the relation between  t and d is k=td Given that, for the tension 42 pounds, the spring is stretched 2 inches. Substituting  t = 42 and d= 2 into  t = kd find the value of k . Therefore,

42= K (2)

K=\frac{42}{2}

K= 21

Thus the relationship is t = 21d

(Hope this helps can I pls have brainlist (crown)☺️)

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Half a pepperoni pizza plus three fourths of a ham-and-pineapple pizza contains 765 Calories. One fourth of a pepperoni pizza pl
SOVA2 [1]

Answer:

Let x be the number of calories in the pepperoni pizza and y be the number of calories in ham-and-pineapple pizza. Then, we can make two equations out of the problem statement.

Eq 1: (1/2)x + (3/4)y = 765

Eq 2: (1/4)x + y = 745

By transposing, Eq 2 becomes: y = 745 - (1/4)x. We substitute this to Eq. 1:

(1/2)x + (3/4)(745 - (1/4)x) = 765

x = 660

Then we substitute x to Eq 2 to get y:

y = 580

Thus, there is 660 calories in pepperoni pizza and 580 calories in ham-and-pineapple pizza.

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3 years ago
Graph ​ y−5=−2/3(x+9) ​ using the point and slope given in the equation. Use the line tool and select two points on the line. Pl
grigory [225]
<span>y−5=−2/3(x+9)
</span><span>y−5=−2/3x - 6
</span>y=−2/3x +1

y=−2/3x +1
This graph would look like relatively steep negative graph, with a y-intercept of 1.

5 0
3 years ago
Read 2 more answers
Evaluate the expression for the given value of the variables.
zzz [600]
For every c substitute 4 and for every d substitute -2

c=4
d=-2

6c + 5d - 4c - 3d + 3c - 6d

= 6(4)+ 5(-2)- 4(4)- 3(-2)+ 3(4)- 6(-2)

=24+(-10)-16-(-6)+12-(-12)

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3 years ago
Find the unit price for each option shown below. Round to the nearest cent when necessary. Option I: 10 candy bars for $6.75 Opt
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Option I: 10 candy bars for $6.75 

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3 years ago
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Una piscina rectangular de 15 m de largo por 9m de ancho está rodeada por un camino de cemento de ancho uniforme. ¿Si el área de
malfutka [58]

Answer:

El ancho del camino es 1.5 m.

Step-by-step explanation:

Una piscina rectangular posee 15 m de largo por 9 m de ancho.

El área de un rectángulo es igual a la base por la altura. Es decir, lado mayor por lado menor. Entonces el área de la piscina es 15 m* 9 m= 135 m²

La piscina está rodeada por un camino de cemento de ancho uniforme, al cual se denomina x y estará en unidades de metros (m). Entonces el largo de la piscina sumado al ancho a ambos lados de la piscina será 15 m + 2*x, mientras que el ancho de la piscina sumado al largo a ambos lados de la piscina es 9 m + 2*x. Entonces este área se puede expresar como

(15 m+2*x)*(9 m+ 2*x)

Entonces al área de la piscina sumado al camino se le resta el área de la piscina y da como resultado el área del camino, cuyo valor es 81 m²:

El área total - área de la piscina =  área del camino

(15 m +2*x)*(9 m+ 2*x) - 135 m²= 81 m²

Resolviendo:

15*9 m²+15*2*x + 9*2*x + 2*x*2*x - 135 m²= 81 m²

135 m² + 30*x + 18*x + 4*x² - 135 m²= 81 m²

48*x + 4*x² = 81 m²

48*x + 4*x² - 81 m²= 0

Siendo una ecuación cuadrática donde a= 4, b= 48 y c= -81, entonces:

\frac{-48+-\sqrt{48^{2}-4*4*(-81) } }{2*4}

Resolviendo:

\frac{-48+\sqrt{48^{2}-4*4*(-81) } }{2*4}= 1.5

\frac{-48-\sqrt{48^{2}-4*4*(-81) } }{2*4}= -13.5

Como las distancias solo pueden ser positivas, entonces <u><em>el ancho del camino es 1.5 m.</em></u>

En la imagen adjunta se puede observar un gráfico de la piscina más el camino

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