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2 years ago

Solve the equation for y -8x+4y=20

Mathematics

1 answer:

Pavel [41]2 years ago

7 0

Answer:

8x-5y=-20

Step-by-step explanation:

First you have to collect it like terms (5y-8x=20

Then reorder the terms (-8x+5y=20)

Next is to change the signs (8x-5y=-20)

Then you have your answer

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A moving trailer with a speed of 70km/h slows down its speed by 15% within 30 seconds. calculate the declaration of the trailer.

antoniya [11.8K]

Answer:

declaration = - 0.55 m/s²

Step-by-step explanation:

The declaration is a negative accelaration.

Therefore:

$a = \frac{v-u}{t}$

a = ?

v = 70 of 15% = 10.5 km/h to m/s = 2.9 m/s

u = 70 km/h to m/s = 19.4 m/s

t = 30 seconds

$a = \frac{2.9-19.4}{30}\\$

a = - 0.55 m/s²

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3 years ago

2.1 x 10^10 OVER 7 x 10^17

vlabodo [156]

2.1 x 10^10/ 7 x 10^17
= 3 x 10^-8

hope this helps and have a great day :)

4 0

3 years ago

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What is the code of this math puzzle (amount of Miles)

Marta_Voda [28]

Just work with it as seperate triangles and then add them up.

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3 years ago

I don't understand this question at all please help if you do

lorasvet [3.4K]

Answer:

Answer is $\frac{4}{3}$

Step-by-step explanation:

To find the interval of x. Use our equations to equal each other.

$-x^2+2x=y,y=0$

$-x^2+2x=0\\-x(x-2)=0\\-x=0 , (x-2)=0\\x=0 ,2$

$\int\limits^2_0 {-x^2+2x} \, dx$

Integrate.

$\frac{-x^3}{3}+x^2\\(\frac{-2^3}{3}+2^2)-[\frac{-0^3}{3}+0^2]\\-\frac{8}{3} +4-0\\-\frac{8}{3}+\frac{12}{3} =4/3$

Using Desmos I have Graphs of both of the equations you have provided. The problem asks us to find the shaded region between those curves/equations.

Proof Check your interval of x.

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2 years ago

You have to write 0.33 as a fraction.how do you choose the denominator?

yaroslaw [1]

100 is the easiest because 1/100 =0.01
33/100=0.33

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3 years ago

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