Please I need help with one and 2 questions

Can someone please help and explain this to what the answer is I’ll give brainliest

CaHeK987 [17]

Answer:

BOTH THE QUESTIONS ARE SAME!!

When finding a perpendicular slope, you need to change the signs and flip the reciprocal

The answer to your question is:

m = -2

4 0

3 years ago

The last wednesday in a certain month is on the 26th day of that month. What day of the week is the first day of that month?

Butoxors [25]

Let’s determine the first Wednesday. This would be 26 - 7n until we reach a number between 1 and 7. Thus, this would be 26 - 7(3) = 5. Thus, the 5th day of that month was a Wednesday. 4th = Tuesday, 3rd = Monday, 2nd = Sunday, and 1st = Saturday. Thus, the first day of the month was Saturday.

3 0

4 years ago

Set up but do not solve for the appropriate particular solution yp for the differential equation y′′+4y=5xcos(2x) using the Meth

taurus [48]

Answer:

So, solution of the differential equation is

$y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

Step-by-step explanation:

We have the given differential equation: y′′+4y=5xcos(2x)

We use the Method of Undetermined Coefficients.

We first solve the homogeneous differential equation y′′+4y=0.

$y''+4y=0\\\\r^2+4=0\\\\r=\pm2i\\\\$

It is a homogeneous solution:

$y_h(t)=c_1e^{-2i t}+c_2e^{2i t}$

Now, we finding a particular solution.

$y_p(t)=A5x\cos 2x\\\\y'_p(t)=A5\cos 2x-A10x\sin 2x\\\\y''_p(t)=-A20\sin 2x-A20x\cos 2x\\\\\\\implies y''+4y=5x\cos 2x\\\\-A20\sin 2x-A20x\cos 2x+4\cdot A5x\cos 2x=5x\cos 2x\\\\-A20\sin 2x=5x\cos 2x\\\\A=-\frac{x}{4} \cot 2x\\$

we get

$y_p(t)=A5\cos 2x\\\\y_p(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x\\\\\\y(t)=y_p(t)+y_h(t)\\\\y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

So, solution of the differential equation is

$y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

7 0

3 years ago

Express the shaded Area as both a faction and a decimal

Ganezh [65]

The shaded area's Fraction= 21/100 and Decimal = 0.21.

Step-by-step explanation:

When an area is divided into multiple smaller regions ( smaller squares ) is called parts.

In case of Squares, it can be divided into either rows or columns, sometimes both.

Form the given diagram, the square consists of 10 rows and 10 columns which makes 100 (10×10) parts in it.

One fraction is obtained by dividing it by the total number of parts.

In this square, 21 shaded fractions are given.

∴ The fraction of shaded Area = 21/100.

Decimal of shaded Area=0.21.

4 0

4 years ago

In a recent survey, 80% of those surveyed indicated that they preferred swimming to biking. Part 1 : If 352 people preferred swi

sladkih [1.3K]

Answer: 88

Step-by-step explanation: The equation us .8x=352 and 352/.8 is 440, which is the total. Multiply 440 by .2 which gives you 88

4 0

3 years ago

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