2 years ago

3x2 y4 z − 6xy − 3z(5x2) how many terms are in the expression? PLEASE HELP! 20POINTS!

1 answer:

7 0

I think there are 3 terms. since this is an expression the meaning of "terms" is asking what's being added or subtracted.

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Factorise completely:<br> 1. 3xy - x<br>2. 4a² - 9

Amanda [17]

Answer:

x(3y - 1) and (2a - 3)(2a + 3)

Step-by-step explanation:

(1)

3xy - x ← factor out x from each term

= x(3y - 1)

(2)

4a² - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

4a² - 9

= (2a)² - 3²

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

6 0

2 years ago

M is the midpoint of XY. Find XY. MX = 2x+10 and MY = 3x-5

IrinaVladis [17]

Answer:

The answer is 32 I had this on a K12 test 2 days ago also pls give me brainliest thx! :D

4 0

2 years ago

ALGEBRA 2- If f(x)= √x-3 , which inequality can be used to find the domain of f(x)?

Fed [463]

B, because you can't get the square root of a negative number

8 0

3 years ago

Read 2 more answers

Find the length of arc RQ. Use 3.14

Helen [10]

Answer:

The length of arc PQ is 8.1 inches.

Step-by-step explanation:

First, you have to find the angle of POQ. Given that total angles in a circle is 360°, so you have to subtract to get ∠POQ :

$73 + 150 + 65 + ∠POQ = 360$

$288 + ∠POQ = 360$

$∠POQ = 360 - 288 = 72$

Next, you have to apply length of arc formula, Arc = θ/360×2×π×r where θ represents the angle of arc and r is the radius of circle :

$arc = \frac{θ}{360} \times 2 \times \pi \times r$

$let \: θ = 72,\pi = 3.14,r = 6.48$

$arc = \frac{72}{360} \times 2 \times 3.14 \times 6.48$

$arc = 8.1 \: inches \: (near.tenth)$

7 0

3 years ago

What is the perimeter of a square if the is a length of 4x and a width of 36-5x?

yulyashka [42]

4x=36－5x
x=4

The perimeter of the square=4x4×4
=64

7 0

3 years ago