5x - 4 -9x + 7
simplify
5x - 9x = -4x
-4 + 7 = 3
Answer: -4x - 3
Answer:
Option (b) is correct.
The sum of given expression
is ![2xy\sqrt{y}+2xy^2\sqrt{x}](https://tex.z-dn.net/?f=2xy%5Csqrt%7By%7D%2B2xy%5E2%5Csqrt%7Bx%7D)
Step-by-step explanation:
Given:Expression ![\sqrt{x^2y^3}+2\sqrt{x^3y^4}+xy\sqrt{y}](https://tex.z-dn.net/?f=%5Csqrt%7Bx%5E2y%5E3%7D%2B2%5Csqrt%7Bx%5E3y%5E4%7D%2Bxy%5Csqrt%7By%7D)
We have to find the sum of the given expression and choose the correct from the given options.
Consider the given expression
.
can be written as ![\sqrt{x^2y^2y}=xy\sqrt{y}](https://tex.z-dn.net/?f=%5Csqrt%7Bx%5E2y%5E2y%7D%3Dxy%5Csqrt%7By%7D)
Also,
can be written as ![2\sqrt{x^3y^4}=2\sqrt{x^2x(y^2)^2}=2xy^2\sqrt{x}](https://tex.z-dn.net/?f=2%5Csqrt%7Bx%5E3y%5E4%7D%3D2%5Csqrt%7Bx%5E2x%28y%5E2%29%5E2%7D%3D2xy%5E2%5Csqrt%7Bx%7D)
Now, the given expression becomes,
![\sqrt{x^2y^3}+2\sqrt{x^3y^4}+xy\sqrt{y}](https://tex.z-dn.net/?f=%5Csqrt%7Bx%5E2y%5E3%7D%2B2%5Csqrt%7Bx%5E3y%5E4%7D%2Bxy%5Csqrt%7By%7D)
.
Now, adding like term, terms having same variable with same degree.
.
Thus, The sum of given expression
is ![2xy\sqrt{y}+2xy^2\sqrt{x}](https://tex.z-dn.net/?f=2xy%5Csqrt%7By%7D%2B2xy%5E2%5Csqrt%7Bx%7D)
There are 7 days in a week. Assuming the same amount is eaten each day, all you have to do is divide 4
![\frac{3}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7D%20)
by 7.
![\frac{19}{28}](https://tex.z-dn.net/?f=%20%5Cfrac%7B19%7D%7B28%7D%20)
or 0.6786
1) what you would have to do in order to solve this problem is divide 3 3/4 by 10 and the answer is to that will be how much mix is needed in order to make one cup of drink.
work
3 3/4 / 10
answer
375/1000
2) 3 3/4= 10
11 1/4=x
to solve for x (which is the unknown variable) you would have to cross multiply which is doing 11 1/4 multiply 10 which equals 112 1/2 now take this number and divide it by 3 3/4 which gives you an answer of 30 cups with 11 1/4 scoops of drink mix
Answer-
30 cups
When a line is reflected along the x axis, the sign of the x coordinate of the points on the line remains the same while that of the y coordinate is reversed. Therefore,
For point A, the x coordinate is - 2 and the y coordinate is - 1. After relection over the x axis, it becomes
(- 2, - -1)
= (- 2, 1)
For point B, the x coordinate is - 1 and the y coordinate is - 3. After relection over the x axis, it becomes
(- 1, - -3)
= (- 1, 3)
The coordinates after reflection are A(- 2, 1), B(- 1, 3)