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4 years ago

help with all its adding decimal i need it in two forms give me all the answers can you draw it in ones tenths and hundredths

Mathematics

1 answer:

Mkey [24]4 years ago

6 0

1. 4.22
2. 3.11
3. 2.12
4. 1.27
5. 7.2
6. 2.61
7. 2.57
8. 2.5
9. 4.13
10. 0.83

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3x - y = 2 and 2x + y = 4<br> X=<br> y =

AveGali [126]

Answer:

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x = 1.2

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3 years ago

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Thx for helping if u do

Helen [10]

6 : 10 = 3 : 5
24 : 40 = 3 : 5
36 : 60 = 3 : 5
42 : 70 = 3 : 5

A. 18 : 20 = 9 : 10 (incorrect)
B. 30 : 20 = 3 : 2 (incorrect)
C. 18 : 30 = 3 : 5 (correct)
D. 50 : 30 = 5 : 3 (incorrect)

The answer is C. 18 : 30

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4 years ago

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3 years ago

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Aleksandr [31]

Answer B

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3 years ago

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Assume that x equals x (t )and y equals y (t ). Let y equals x cubed plus 4 and StartFraction dx Over dt EndFraction =2 when xe

nika2105 [10]

Answer:dy/dt(x=3)=54

Step-by-step explanation:

We know that we can write:

$\frac{dy}{dt}=\frac{dy}{dx} *\frac{dx}{dt}$

and so evaluate it as a product of functions, that is for a given value of x or t, we get that

$\frac{dy}{dt}(s)=\frac{dy}{dx} (s) * \frac{dx}{dt}(s)$ .

Now we are told that:

$1. x=x(t),\ 2.y=x^3+4,\ \frac{dx}{dt} =2,\ for \ x=3,$

whenever it happens, this means the influence of t is hidden, and we only consider the result, that is, how much is x when the derivative has the value of 2, we are not concerned for what value of t it happens, since we get all the necessary information beforehand.

Now we need to calculate

$\frac{dy}{dx}=3x^2 \rightarrow \frac{dy}{dx}(3)=3(3)^2=27$ .

Therefore

$\frac{dy}{dt}(x=3)=\frac{dy}{dx} (x=3) * \frac{dx}{dt}(x=3)$ or

$\frac{dy}{dt}(x=3)=27 *2 = 54$ .

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4 years ago