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Scrat [10]
2 years ago
10

The total mileage for Wayne's trip is 420 miles. So far, he has traveled 180 miles in 3 hours. Wayne will continue his trip at t

his rate of speed.
Which expression shows how long it will take Wayne to complete his trip?

(420+180)÷(180÷3)

(420−180)÷(180÷3)

(420−180)+(180÷3)

(420−180)÷(180−60)
Mathematics
1 answer:
Wewaii [24]2 years ago
3 0
It isalittle hard to explain but, in the most simplest way, i did the math, I found out the total amount of hrs it took in total. The hrs i added where 4 so, if u do the math on all the choices, only answer B gives you 4, therefor the answer is B.
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Express 3.3.3.5.5 using exponents
nadya68 [22]
I assume you mean 3*3*3*5*5 it would be 3^3 times 5^2. thats as simplified as i can make it. hope this helps! if anyone knows a better way to put these please post.
7 0
3 years ago
If y varies inversely as x and x is 6 when y is 13, what is x when y is 8?
Vikki [24]
Y = k/x
13 = k/6
k = 78

y = k/x
8 = 78/x
8x = 78
x = 78/8
x = 9.75
4 0
3 years ago
Read 2 more answers
(a) What is wrong with the following equation? x2 + x − 42 x − 6 = x + 7 (x − 6)(x + 7) ≠ x2 + x − 42 The left-hand side is not
jeka94

Answer:

Attached please find answer

Step-by-step explanation:

= (x² + x - 42) / (x - 6)

= [x² + (7x - 6x) - 42] / (x - 6)

= [x² + 7x - 6x - 42] / (x - 6)

= [(x² + 7x) - (6x + 42)] / (x - 6)

= [x(x + 7) - 6(x + 7)] / (x - 6)

= [(x + 7)(x - 6)] / (x - 6)

= x + 7 → when x approches 6

= 6 + 7

= 13

Other method:

Lim   (x² + x - 42) / (x - 6)

x→ 6

When x → 6, there is an indeterminate expression because: 6 - 6 = 0

Do you know the l'Hôpital's rule, when x → a:

Lim [ f(x) / g(x) ] = Lim [ f'(x) / g'(x) ]

f(x) = x² + x - 42

f'(x) = 2x + 1

g(x) = x - 6

g'(x) = 1

= f'(x) / g'(x)

= (2x + 1)/1

= 2x + 1 → when x approches 6

= 12 + 1

= 13

3 0
2 years ago
Can someone help me with 7?
Elanso [62]

Solving the equation for y puts it in slope-intercept form.

3x-5y=5\qquad\text{given equation}\\3x-5=5y\qquad\text{add 5y-5}\\y=\dfrac{3}{5}x-1\qquad\text{divide by 5}

This tells you one point can be plotted on the y-axis at y=-1. Another point can be plotted 3 units up and 5 units to the right of that one, at (5, 2). The graph is the line through those points.

Since you're asked to plot at least 3 points, your third point could be 5 units left and 3 units down from the first one, at (-5, -4).

7 0
3 years ago
1/2x+2/3=1/3-3/2 What does x equal and can you show me the steps?
Irina18 [472]
X/2+2/3 = 2+3(-3)/3*2

3x+2*2=2*3 = 2-3*3/3*2

3x+4/2*3 = 2-9/3*2

3x+4=-7

(3x+4)+(-4)=-7-4

3x=-11

3x/3=-11/3

x=-11/3

hope  this helps!

3 0
3 years ago
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