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yulyashka [42]
3 years ago
11

Hello please help i’ll give brainliest

Mathematics
1 answer:
Ivenika [448]3 years ago
8 0

Answer:

Step-by-step explanation:

Dot plot

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If QR = 18, RS = x -11, and QS = 2x - 11, what is QS?
monitta

Answer:

QS =25

Step-by-step explanation:

QR + RS = QS

18 + (x-11) =2x-11

7 +x =2x -11

18=x

Plug in x

2(18) -11

36-11

QS=25

18 + (18-11) = 2(18)- 11

18+ 7 = 36 -11

25= 25

True

8 0
4 years ago
Read 2 more answers
How do you factorise this using DOPS/DOTS?<br><br> 2(x + 3)^2-10
Margaret [11]

Answer:

Step-by-step explanation:

Hello,

2(x+3)^2-10\\=2[(x+3)^2-5]\\=2[(x+3)^2-(\sqrt{5})^2]\\\\=2[(x+3+\sqrt{5})(x+3-\sqrt{5})]

Hope this helps

4 0
3 years ago
Carlie is out shopping and finds a 198.00 hat that is on sale for 90% of its original price. What is the new cost of the item? C
lbvjy [14]

I believe the new cost of the item is $19.80

5 0
3 years ago
WILL MARK B!<br> Please I need help I have a quiz
MArishka [77]

Answer:

a) 2x² - x + 3 = x(2x + 1) - 2x

<=> 2x² - x + 3 = 2x² + x - 2x

<=> 3 - x = - x

<=> 3 = 0

=> no solution

b) x/2 - x/3 - x/4 = 1/12

\frac{6x}{12}  -  \frac{4x}{12}  -  \frac{3x}{12}  =  \frac{1}{12}  \\  \\  \frac{ - x}{12}  =  \frac{1}{12}  \\  \\  =  >  - x = 1 \\  \\  \\  <  =  > x = 1

=> the euqation has the solution x = 1

c) |x - 5| = 2|x|

=> x - 5 = 2x

or x - 5 = -2x

<=> x = -5

or 3x = 5

<=> x = -5

x = -5or x = 5/3

d) defined conditions: 2 - x 》 0

<=> x 《 2

we have:

\sqrt{x + 4}  = 2 - x \\  <  =  > x + 4 = (2 - x) {}^{2}   \\  <  =  > x + 4 =  {x}^{2}  - 4x + 4 \\  <  =  >  {x}^{2}  - 5x = 0 \\  <  =  > x(x - 5) = 0 \\

<=> x = 0 (because x 《 2)

e)

\sqrt{5}  =  \frac{1}{25 {}^{x} }  \\   =  > 5 =  \frac{1}{25 {}^{2x} }  \\  <  =  > 5.25 {}^{2x}  = 1  \\ <  =  >  5.5 {}^{4x}  = 1 \\  <  =  > 5 {}^{4x + 1}  = 1 \\  =  > 4x + 1 = 0

<=> x = -1/4

3 0
3 years ago
Read 2 more answers
What is this method called?????​
Serga [27]

Answer:

The algebraic method is a collection of several methods used to solve a pair of linear equations with two variables.

Step-by-step explanation:

8 0
3 years ago
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