It is $300 that is the original price of the phone.
Answer:
Hi there!
The answer is A, and C
Step-by-step explanation:
cos(-x)=cos(x)
sec(-x)=sec(x)
Answer:
<em>-3x+10y</em>
Step-by-step explanation:
Given the expression
, we are to simplify by combining the like terms. On simplification we have;
![= -4\left(2x-y\right)+y+5\left(x+y\right)](https://tex.z-dn.net/?f=%3D%20-4%5Cleft%282x-y%5Cright%29%2By%2B5%5Cleft%28x%2By%5Cright%29)
Open the parenthesis:
![= -4(2x)-4(-y)+y+5(x)+5(y)\\\\= -8x+4y+y+5x+5y](https://tex.z-dn.net/?f=%3D%20-4%282x%29-4%28-y%29%2By%2B5%28x%29%2B5%28y%29%5C%5C%5C%5C%3D%20-8x%2B4y%2By%2B5x%2B5y)
Collect the like terms:
![= -8x+5x+4y+y+5y](https://tex.z-dn.net/?f=%3D%20-8x%2B5x%2B4y%2By%2B5y)
Sum up the resulting expression
![= -8x+5x+4y+y+5y\\= -3x+10y](https://tex.z-dn.net/?f=%3D%20-8x%2B5x%2B4y%2By%2B5y%5C%5C%3D%20-3x%2B10y)
<em>Hence the required expression on simplification is -3x+10y</em>
Given:
Scatter plot of weight loss plan.
To find:
how many pounds were lost per month with 4 hours of weekly.
Solution:
Take any two points on the trend line.
Let the points are (3, 4) and (5, 7).
Slope of the line:
![$m=\frac{y_2-y_1}{x_2-x_1}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D)
![$m=\frac{7-4}{5-3}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7B7-4%7D%7B5-3%7D)
![$m=\frac{3}{2}](https://tex.z-dn.net/?f=%24m%3D%5Cfrac%7B3%7D%7B2%7D)
m = 1.5
Using point-slope formula:
![y-y_1=m(x-x_1)](https://tex.z-dn.net/?f=y-y_1%3Dm%28x-x_1%29)
![y-4=1.5(x-3)](https://tex.z-dn.net/?f=y-4%3D1.5%28x-3%29)
![y-4=1.5x-4.5](https://tex.z-dn.net/?f=y-4%3D1.5x-4.5)
Add 4 on both sides.
![y=1.5x-0.5](https://tex.z-dn.net/?f=y%3D1.5x-0.5)
Approximate equation of a line is y = 1.5x - 0.5
Substitute x = 4.
y = 1.5(4) - 0.5
y = 6 - 0.5
y = 5.5
Which is nearly equal to 6.
Also see in the scatter plot, y-value for the corresponding value of 4 in x-axis is 6.
Hence 6 pounds lost per month with 4 hours of weekly aerobic activity.
Answer:
Given expression: 3x+9
Take 3 outside from the expression, we get,
= 3(x+3), which is called the equivalent expression
Free Online Calculators
Center of Mass Calculator Difference of Cubes Calculator
Volume Calculator Poisson Distribution Calculator
Line Graph Calculator Speed Conversion Calculator
Variable Calculator Taylor Series Calculator
Improper Fraction Calculator Definite Integral Calculator