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mixer [17]
3 years ago
14

1. 7x(x-2y) (2+1)(+5)

Mathematics
2 answers:
liq [111]3 years ago
5 0

Step-by-step explanation:

1) 7x(x - 2y)

= (7x . x) - (7x . 2y)

= 7x² - 14xy

2) (2 + 1)(+5)

= 3(+5)

= (3 . +5)

= (3 . 5)

= 15

Neporo4naja [7]3 years ago
3 0

Step-by-step explanation:

7x(x - 2y)

= 7x.(x - 2y)

= 7x² - 14xy

= (2 + 1)(+5)

= (3)(5)

= 3 × 5

= 15

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Find a formula for the nth term of the arithmetic sequence
vagabundo [1.1K]

Answer:

11+2n

Step-by-step explanation:

Arithmetic sequence=a+(n-1)d

a=first number

n=nth term

d=difference

a=9

n=?

d=-2

So let's solve

9+(n-1)(-2)

9+(2n+2)

9+2n+2

Collect like terms

9+2+2n

11+2n

So the nth term is 11+2n

7 0
4 years ago
3a
Jet001 [13]

Answer:

Option D is correct.

VS = 20 units.

Step-by-step explanation:

The complete question is contained in the attached image to this answer.

From the image attached and the additional information about the triangles, it is evident that that triangle VSW is similar to triangle QSR.

Hence, we can write the ratio as

(VS/QS) = (VW/QR)

VS = 2a

QS = 2 × VS = 2 × 2a = 4a

VW = 2a - 2

QR = 3a + 6

(2a)/(4a) = (2a - 2)/(3a + 6)

Cross multiplying,

2a (3a + 6) = 4a (2a - 2)

3a + 6 = 2 (2a - 2)

3a + 6 = 4a - 4

4a - 3a = 6 + 4

a = 10

VS = 2a = 20 units.

Hope this Helps!!!

4 0
4 years ago
Which is true of a line?
slamgirl [31]

Answer:

A line is one-dimensional

Step-by-step explanation:

In its simplest form: a line describes one dimension, a plane describes two dimensions, and a cube describes three dimensions.

5 0
3 years ago
Read 2 more answers
Y = 7x + 7<br> y = -7x + 19<br><br> Solve the system algebraically.
shtirl [24]
Hello,

To this question, It's only directly sum the equations:

y + y = 7x - 7x +7+19

2y = 0x + 26

2y = 26

y = 26 ÷ 2

y = 13


Now only to replace y = 13 in the equation of up or of down.

Then stay:

y = 7x + 7

13 = 7x + 7

7x = 13 -7

7x = 6

x = 6 / 7

7 0
4 years ago
Solve for x 2/10=3/x-9
Mrrafil [7]

Answer:

24

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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