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3 years ago

5) Which expression is equivalent to 4(3 + 2)?

1 answer:

3 0

D, because if you distribute 4(3+2) it equals= 4x3
= 12
4x2
=8
and there’s an addition sign so you will add the remaining numbers 12+8

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Solve this equation 13(y+7)=3(y−1)

Alchen [17]

13(y+7)=3(y-1)
13y+91=3y-3
13y-3y=-91-3
10y=-94
-94/10
Y=-9.4

6 0

4 years ago

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A brick of mass 4 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is t

Zielflug [23.3K]

Answer:

Step-by-step explanation:

In this system we have the force of the spring and the gravitational force. The equation that describes that is

$F_{s}+F{g}=ma\\k(y_0+y)-mg=ma$

where y0 is the equilibrium position when the string is free and y0+y is the new equilibrium position when the object is hanged of the string. By replacing by derivatives we have

$ky_0+ky-mg=ma\\mg+ky-mg=ky=ma\\\\ky=m\frac{d^2y}{dt^2}\\\\my''+ky=0$

the solution for this differential equation is (by using the characterisic polynomial)

$y(x)=Acos(kt)+Bsin(kt)\\k=\omega^2m$

hope this helps!!

7 0

4 years ago

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I need to find X and Y to make this shape a parallelogram. Can someone help me? (geometry student)

aliya0001 [1]

Answer:

x=52

Step-by-step explanation:

One of the properties of parallelograms is that angle A = Angle C

5y-54 = 3x eq1

Another property of parallelograms is that angle A + angle B = 180 degrees

5y-54+2y-60 = 180

7y = 180+114 = 294

y = 42

Putting this value in eq1

3x = 5*42-54 = 210-54 = 156

x = 52

8 0

2 years ago

In a scalene triangle , the perimeter is 33, and the length of one side is 15, and the difference between the two other sides is

zepelin [54]

Answer:D

Step-by-step explanation:

4 0

3 years ago

Can you please multiply this<br> (–2.3)(6.5)

liubo4ka [24]

Hello There!

-2.3 x 6.5 = -14.95.

The answer is -14.95.

Hope This Helps You!
Good Luck :)

- Hannah ❤

3 0

4 years ago

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