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3 years ago

5½x2½= plzz help i need it

Mathematics

1 answer:

Dimas [21]3 years ago

8 0

Answer:

Step-by-step explanation:

55/4 or 13 3/4

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Milo receives a commission of 8% on all sales. If his commission on a sale was $ 122.00 , find the cost of the item he sold.

Travka [436]

Step-by-step explanation:

yall still doing math its summer

3 0

3 years ago

In problem solve the given differential equation by underdetermined coefficients y''-2y+y=xe^x

Alexus [3.1K]

Answer:

Solution is $y(t)=C_1e^x+C_2xe^x+\frac{x^3e^x}{6}$

Step-by-step explanation:

Given Differential Equation,

$y"-2y'+y=xe^x$ ...............(1)

We need to solve the given differential equations using undetermined coefficients.

Let the solution of the given differential equation is made up of two parts. one complimentary solution and one is particular solution.

$\implies\:y(x)=y_c(x)+y_p(x)$

For Complimentary solution,

Auxiliary equation is as follows

m² - 2m + 1 = 0

( m - 1 )² = 0

m = 1 , 1

So,

$y_c(x)=C_1e^x+c_2xe^x$

Now for particular solution,

let $y_p(x)=Ax^3e^x$

$y'=Ax^3e^x+3Ax^2e^x$

$y"=Ax^3e^x+6Ax^2e^x+6Axe^x$

Now putting these values in (1), we get

$Ax^3e^x+6Ae^2e^x+6Axe^x-2(Ax^3e^x+3Ax^2e^x)+Ax^3e^x=xe^x$

$Ax^3e^x+6Ae^2e^x+6Axe^x-2Ax^3e^x-6Ax^2e^x+Ax^3e^x=xe^x$

$6Axe^x=xe^x$

$6A=1$

$A=\frac{1}{6}$

$\implies\:y_p(x)=\frac{x^3e^x}{6}$

Therefore, Solution is $y(t)=C_1e^x+C_2xe^x+\frac{x^3e^x}{6}$

8 0

4 years ago

Find the area if the figure, pls write calculations

nataly862011 [7]

Answer:

area = 40.8 cm²

Step-by-step explanation:

The figure consists of a rectangle and a triangle.

area of rectangle = 12 × 2.4 = 28.8 cm²

area of triangle = $\frac{1}{2}$ bh ( b is the base and h the height )

Here b = 2.4 and h = 18 - 12 = 6 , then

area = $\frac{1}{2}$ × 4 × 6 = 2 × 6 = 12 cm²

area of figure = 28.8 + 12 = 40.8 cm²

8 0

3 years ago

Which of the following shows 7.538 correctly rounded to the ones place?

kvv77 [185]

It would be B. 8
Since ones place is 8.000 and 7.538 can be rounded up to 8

6 0

3 years ago

dustin makes 2,330 each month and pays 840 for rent. to the nearest tenth of a percent what percent of dustins earnings are spen

xz_007 [3.2K]

Answer:

36.1%

Step-by-step explanation:

Calculate percent of rent to earnings by creating the fraction and multiplying by 100%, that is

percent = $\frac{rent}{earnings}$ × 100%

= $\frac{840}{2330}$ × 100% = 36.1% ( nearest tenth )

4 0

3 years ago