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3 years ago

Brainliest for first answer

Mathematics

1 answer:

BigorU [14]3 years ago

3 0

597 = 500 + 90 + 7

x 3= x 3

1791 = 1500 + 270 + 21

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If x = 4 in this equation, what does y equal? 5x+8y=4

monitta

5x + 8y = 4.....when x = 4
5(4) + 8y = 4
20 + 8y = 4
8y = 4 - 20
8y = - 16
y = -16/8
y = -2 <==

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4 years ago

Question below.<br><br> Please help!

xz_007 [3.2K]

Answer:

V^-3

Step-by-step explanation:

The answer is in the pic above

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3 years ago

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HELP PLZ<br><br> what is 25 - the cube root of 125

Korvikt [17]

The cube root of 125 is 5.
25 - 5 = 20

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3 years ago

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A force of 8 lb is required to hold a spring stretched 8 in. beyond its natural length. How much work W is done in stretching it

-BARSIC- [3]

Answer:

The work done in stretching it from its natural length to 14 in. beyond its natural length is W=8.17 ft-lb.

Step-by-step explanation:

We know that a force of 8 lb is required to hold a spring stretched 8 in. beyond its natural length.

This let us calculate the spring constant k as:

$F=kx\\\\k=F/x=(8 \;lb)/(8\;in)=1\;lb/in$

We know that work is, in an scalar form, the product of force and distance.

The force F is equal to the spring constant multiplied by the distance from the natural length.

Then, as the force changes with the distance from the natural length, we have to calculate integrating:

$W=\int_0^{14}F\,dx=\int_0^{14}kx\,dx\\\\\\W=\dfrac{1}{2}kx^2\left|^{14}_0=\dfrac{1}{2}(1\,lb/in)(14 \,in)^2-\dfrac{1}{2}(1\,lb/in)(0 \,in)^2$

$W=98lb\cdot in-0lb-in\\\\W=98(lb\cdot in)\cdot \dfrac{1 \,ft}{12\,in}=8.17\;lb\cdot ft$

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3 years ago

Write your answers as fractions. -(3/5 )^4

Blababa [14]

The answer is:

-81/625

8 0

3 years ago