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Kruka [31]
3 years ago
14

Answer quick please I only have 10 more minutes and I still have 10 questions

Mathematics
1 answer:
denis23 [38]3 years ago
6 0

the three one which is waves

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4 = 5x + 3y plz i need an answer for this
hram777 [196]
Whats the format its suppose to be written in?
UPDATE: Y=-\frac{5x}{3}+\frac{4}{3}
4 0
3 years ago
Read 2 more answers
Simplify the followin expression.x^4+3x^3-2x^3-5x^2-x+x^2+x+1+7x^4
REY [17]

Answer:

8 x^ 4  +  x^ 3  −  4x^2  +  1

Step-by-step explanation:

7 0
3 years ago
A weight attached to a spring is at its lowest point, 9 inches below equilibrium, at time t = 0 seconds. When the weight it rele
a_sh-v [17]
The motion can be modeled as
x(t) =9 \, cos( \frac{2 \pi t}{T} )
where 
x = the position below the equilibrium position
T =  the period of the motion
t = time

The weight returns to its equilibrium position when x = 0. 
This occurs when
\frac{2 \pi t}{T} = \frac{ \pi }{2}
That is,
t= \frac{T}{4}

Because the weight returns to the equilibrium position when t =  3 s, therefore
T = 12 s
The motion is
x(t) = 9 \, cos( \frac{ \pi t}{6} )

When t = 1 s, the position of the weight from equilibrium is
d = 9 \, cos( \frac{ \pi }{6} ) = 9( \frac{1}{2} ) = 4.5 \, in

Answer:
d = 9 \, cos( \frac{ \pi }{6} ) = 4.5 \, in

3 0
3 years ago
Read 2 more answers
A snack cart sells lemonade for $2 and hot dogs for $5. The vendor sold 86 items today for a total of $330.
Firdavs [7]
Solutions 

There are two equations in the system of equations in this problem.
Let x = lemonade and y = hot dogs

Equation # 1

x + y = 86

This says that t<span>he vendor sold 86 items. 

</span>Equation # 2

2x + 5y = 330

= $2 for each lemonade
= $5 for each hot dog.

= total amount earned is $330.

Only these two equations are true and needed.
3 0
3 years ago
Read 2 more answers
Evaluate the following rational expression for x equals 7
alexandr1967 [171]
It would be 7x hope this helps
5 0
3 years ago
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