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babymother [125]
3 years ago
13

ASAP like now I need help!!!!

Mathematics
2 answers:
k0ka [10]3 years ago
3 0

Answer:

(5x + 40), (7x + 8), (10x)

Step-by-step explanation:

Ok, I'm not completely sure, I'm taking a bullet here. But lemme know what you get

Phoenix [80]3 years ago
3 0
10x. 7x+8. 5x+40 this might be it ....hopefully
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Calculate y as a function of x when dy/dx = 4x3 + 3x2 - 6x + 5
PtichkaEL [24]
Answer:
y = x⁴ + x³ - 3x² + 5x + C

======

Separable differential equations such as these ones can be solved by treating dy/dx as a ratio of differentials. Then move the dx with all the x terms and move the dy with all the y terms. After that, integrate both sides of the equation.

   \begin{aligned}
\dfrac{dy}{dx} &= 4x^3 + 3x^2 - 6x + 5 \\
dy &= (4x^3 + 3x^2 - 6x + 5) dx \\
\int dy &= \int (4x^3 + 3x^2 - 6x + 5) dx 
\end{aligned}

In general (understood that +C portions are still there), 

   \int x^{m} = \dfrac{x^{m+1}}{m+1}

Note that ∫dy = y  since it is ∫1·dy = ∫y⁰ dy = y¹/(0+1) = y
For the right-hand side, we use the sum/difference rule for integrals, which says that

   \int \big[f(x) \pm g(x)\big]\, dx = \int f(x)\,dx \pm \int g(x) \, dx

Applying these concepts:

   \begin{aligned} 
 \int dy &= \int (4x^3 + 3x^2 - 6x + 5) \, dx \\
y &= \int 4x^3\,dx + \int 3x^2 \, dx - \int 6x\, dx + \int 5\, dx \\
&= \frac{4x^4}{4} + \frac{3x^3}{3} - \frac{6x^2}{2} + 5x + C \qquad \text{(only one $C$ is needed)} \\
&= x^4 + x^3 - 3x^2 + 5x + C
\end{aligned}

The answer is y = x⁴ + x³ - 3x² + 5x + C
6 0
3 years ago
The ages of three family children can be expressed as consecutive integers. the square of the age of the youngest child is 4 mor
sukhopar [10]
Let the middle child be x
youngest child = x - 1
Oldest child = x + 1

(x - 1)^2 = 8(x + 1) + 4
x^2 - 2x + 1 = 8x + 8 + 4 
x^2 - 10x - 11 = 0
(x - 11) * (x + 1) = 0

X = - 1 makes no sense. How can a middle child be - 1 years old?
x = 11

The youngest child is 10
The middle child is 11
The oldest child is 12

Check
=====
10^2 = 100
(8*12) + 4
96 + 4 = 100 So the results have been checked.
3 0
3 years ago
4(4b-8)-3/8<br> Please help i have no idea what to do
Ksivusya [100]

Answer:

4(4b - 8) -  \frac{3}{8}  \\ 16b - 32 -  \frac{3}{4}  \\ \frac{64b - 128 - 3}{8}  \\  \frac{64b - 131}{8}

hope this will help you

7 0
2 years ago
Ryan spent $26.32 on 8 gallons of<br> gas. How much would he spend<br> for 20 gallons?
Nana76 [90]

Answer:

$65.80

Step-by-step explanation:

Divide 26.32 by 8 to find how much is in one gallon.

26.32÷8=3.29

So it's 3.29 per gallon.

Multiply 3 29 by 20.

20×3.29= 65.8

So he would spend $65.80

5 0
4 years ago
Read 2 more answers
Mary can make a quilt in 3 days and Eva can make
Rina8888 [55]

Answer: in explanation

Step-by-step explanation

Sandi can perform  1/9 of the task in a day

Eva can perform 1/5 of the task in a day

Working together, they can perform

                                                            1/9 + 1/5 of the task per day

                                                            = 5/45 + 9/45 = 14/45 of the task in a day

or                                                             45/14 days in the task = 3.2 days

So

          It would take about 3.2 days to complete the task working togethe

7 0
3 years ago
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