Answer:
11 because 165÷25=11 so yeah
Answer: x = 7, x = -1
Step-by-step explanation: Move the term to the left side
x^2 + 2x - 7 = 8x
x^2 + 2x - 7 - 8x = 0
Combine like terms
x^2 + 2x - 7 - 8x = 0
x^2 - 6x - 7 = 0
x^2 - 6x - 7 = 0
a = 1
b = -6
c = -7
x = -(-6) + (-6)^2 - 4 x 1(-7)/ 2 x 1
Evaulate the Exponent
Multiply the numbers
Add the numbers
Evaluate the square root
Multiply the numbers x = 6 ± 8/2
To solve for the unknown variable, separate into two equations: one with a plus and the other with a minus.
x = 6 + 8/2
x = 6 - 8/2
Rearrange and isolate the variable to find each solution
x = 7
x = -1
By looking at the graphs we can infer the equation that represents both functions. If we plot the equations in a graphing tool, we can easily find your points.
Please, see the attached image
Linear
f(x) = (-3/2)*x + 3
x = -3 ---------> y = 15/2 = 7.5
x = -2 ---------> y = 6
x = -1 ---------> y = 4.5
x = 0 ---------> y = 3
x = 1 ---------> y = 1.5
x = 2 ---------> y = 0
x = 3 ---------> y = -1.5
Exponential
g(x) = (1/2)^x
x = -3 ---------> y = 8
x = -2 ---------> y = 4
x = -1 ---------> y = 2
x = 0 ---------> y = 1
x = 1 ---------> y = 0.5
x = 2 ---------> y = 0.25
x = 3 ---------> y = 0.125
(1/2)^x = (-3/2)*x + 3
If we solve this equation, we get two values
x = -2.868 and
x = 1.81
24 pounds
she dieted for 13 weeks she lost and gain the first 2 which left her with losing 2 pounds for 11 weeks which is 22 pounds total.
add 3 pounds for the first week
25 pounds.
subtract a pound from the second week you get that
she lost 24 pounds total