Answer:
The speed of the current is 3 miles per hour
Step-by-step explanation:
The equations for rate (r), distance (d), and time (t) are ⇒ d = rt, r = d/t, = t = d/r
Let x = speed in still water
Let c = speed of the current
The main difference with these problems is rate needs to be expressed using two variables because moving upstream the current is against you and downstream it moves with you.
Distance Rate Time
Upstream x − c
Downstream x + c
The distance column with the numbers from the problem and the value for speed in still water for x.
Distance Rate Time
Upstream 4 5 − c
Downstream 16 5 + c
The column for time using the other two columns knowing that rate, distance ⇒ time = Distance Rate Time
Upstream 4 5 − c
5 − c
4
Downstream 16 5 + c
5 + c
16
“It takes as long …” from the problem means that the two times are equal to each other. So, the equation can be written as:
4/5− c = 16/5 + c ⇒ Solve by cross-multiplying ⇒ 5(4 + c) = 16 5( − c) ⇒ c = 3
Answer:
B
Step-by-step explanation:
Answer:
1.) The minimum wage increased by $0.15 per year.
5.) The minimum wage in 1990 was $0.15.
7.) The minimum wage in 1990 was $3.95.
Step-by-step explanation:
given that the years between 1990 and 2009, the regression equation yˆ=0.15x+3.95 models the minimum wage.
where x = 19 years
The slope = 0.15
The intercept = 3.95
The best statement for interpretation of the slope and interpretation of the y-intercept are:
1.) The minimum wage increased by $0.15 per year.
5.) The minimum wage in 1990 was $0.15.
7.) The minimum wage in 1990 was $3.95.
So 63 divde by 7 = 9 so we need to multiply 2 by 9 to get the answer and 2 * 9 = 18
Caracterizar las condiciones de ordenación que definen las permutaciones en un conjunto finito de elementos para la solución de problemas donde se aplica ésta técnica de conteo. DEFINICIÓN: Una PERMUTACIÓN es un arreglo de objetos distintos de un conjunto en un determinado orden
<span>más inteligente por favor :D
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(english)
<span>Characterize the ordering conditions that define the permutations in a finite set of elements for the solution of problems where this counting technique is applied. DEFINITION: A PERMUTATION is an arrangement of objects other than a set in a certain order
Brainliest please :D
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