Answer:
x = 6
Step-by-step explanation:
(x + 2)(2x - 5) = 56
2x^2 - x - 10 = 56
2x^2 - x - 66 = 0
(2x +11)(x - 6) = 0
2x +11 = 0
2x = -11
x = -5.5
Since you cannot measure length using a negative number, we cannot use this answer nor round.
x - 6 = 0
x = 6
Hope I helped!
Answer:
x = - 2√2
x = -2
Step-by-step explanation:
A . 5 + x² = 2 x² +13
5 + x² - 2 x² - 13 = 0
- x² -8 = 0
- x² = 8
x² = -8
x = - √8
x = - 2√2
B . 5 + x³ = 2 x³ + 13
5 + x³- 2 x³ - 13 = 0
- x³ -8 = 0
-x³ = 8
x³ = -8
x = - ∛8
x = -2
Answer:
y=49x
Step-by-step explanation:
As you can see from the graph, the distance from home increases by 49 miles per hour driven.
Therefore the distance driven for any given time in hours is 49x
Therefore y = 49x
To investigate which of the choices satisfy the equation, substitute the values of the abscissas into the equation and solve for y. See if the value of y calculated is equal to the value of the ordinate of the point.
A. (7, -2) ; (2)(7) + 5y = 4 ; y = -2 EQUAL
B. (0, -1) ; (2)(0) + 5y = 4 ; y = 0.8 NOT EQUAL
C. (0, 1) ; <span>(2)(0) + 5y = 4 ; y = 0.8 NOT EQUAL
D. (3, -2) ; (2)(3) + 5y = 4 ; y = -0.4 NOT EQUAL
Thus, the answer is letter A. </span>