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2 years ago

Factorizationx² - 4y²-c²-4cy

Mathematics

1 answer:

Kamila [148]2 years ago

4 0

Answer:

( x + 2y ) ( x - 2y )

Step-by-step explanation:

x² + [ -2xy + 2xy ] - 4y²

= x² - 4y²

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Point (3,2) lies on the line ax+2y = 10. Find a.

polet [3.4K]

Answer:

-2

Step-by-step explanation:

Using y=mx+c

ax+2y=10

Put y as subject of formula

2y= 10-ax

2y= -ax+10

using point (3,2)

2y= -ax+10

2(3)= -a(2)+10

6= -2a+10

Put a as subject of formula

-2a=10-6

-2a=4

a= 4/-2

a= -2

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3 years ago

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The class has n students, and n is an even number. The students are forming teams to work on their homework. Each team has exact

yuradex [85]

Answer:

Distinct ways in which they all can form the teams for the class = n(n-1)

Step-by-step explanation:

Total numbers of students = n (even number)

Number of student in each team = 2

Number of distinct ways are there to form the teams for the class:

$P^{n}_{k}=\frac{n!}{(n-k)!}$

where = n = number of elements = n

k = number of elements choose = 2

$P^{n}_{2}=\frac{n!}{(n-2)!}=\frac{n\times (n-1)\times (n-2)!}{(n-2)!}$

$=n\times (n-1)$

8 0

3 years ago

Solve for f. f+0.2=−3 HELP THIS IS URGENT

Mumz [18]

F= -3 -.2
F= -3.2
The final answer is -3.2

4 0

3 years ago

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3. Let sin 21 = 0.358. What is the value of x for cos x=0.358?

r-ruslan [8.4K]

Answer:

$\cos(69)$

Step-by-step explanation:

We will use the co-function identity for sine, where:

$\sin(x)=\cos(90-x)$

Since sin(21)=0.358=cos(x). This means that:

$21=90-x$

Solve for x. Add x to both sides:

$x+21=90$

Subtract 21 from both sides:

$x=69\textdegree$

Hence:

$\sin(21)=\cos(69)\approx0.358$

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3 years ago

Just write me the equation not that much work

anzhelika [568]

T(2)=d you multiply t times 2 to get d

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4 years ago

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Factorizationx² - 4y²-c²-4cy ​

Factorizationx² - 4y²-c²-4cy