Answer:
(8*2)-2
Step-by-step explanation:
Answer:
x = 6
Step-by-step explanation:
5x + 15 = 45
Subtract 15 from both sides
5x = 30
Divide by 5 on both sides
x = 6
Hope this helps :)
Answer:
x = 3, x = - 
Step-by-step explanation:
Since x = 2 is a root then (x - 2) is a factor
2x³ - 3x² - 23x + 42 ÷ (x - 2)
= (x - 2)(2x² + x - 21)
solve 2x² + x - 21 = 0 for remaining roots
(2x + 7)(x - 3) = 0
equate each factor to zero and solve for x
x - 3 = 0 ⇒ x = 3
2x + 7 = 0 ⇒ x = -
Answer:
- <u><em>Mr. Mole's burrow lie 7 meters below the ground.</em></u>
Explanation:
The information given can be summarized as:
- Mr Mole's altitude relative to the ground, in meters: A = - 2.3t - 7
- Time, since Mr. Mole started digging, in minutes: t
<u>Interpetration of the terms in the model A = -2.3t - 7</u>
The equation A = -2.3t - 7 is a linear function, which consists of two terms:
- The term -2.3t indicates that the altitude of Mr Mole decreases by 2.3 meters every minute. This is, -2.3 is the slope of the line in the graph that represents the altitude.
- The constant term - 7 is the altitude at t = 0, because at t = 0 A = -2.3(0) - 7 = 0 - 7 = 0. This is, -7 is the intercept with the vertical axis in the graph that represents the altitude.
Thus, altitude at which <em>Mr. Mole's burrow lie</em> is the initial value given by the function, this is the altitude at t = 0, or the vertical intercept of the line; which, as just said is - 7. The negative sign tells that the value is below the ground (ground level is 0 meters). Then, <em>Mr. Mole's burrow lie 7 meters below the ground.</em>
Writing it as a decimal would be 3.85 you just divide it
