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3 years ago

While driving from Chicago, Brent had a visibility problem due to the fog. After 1 1/2

1 answer:

5 0

1) Let x be the original speed that he was driving;

x mph ---> 1.5 hours
x+44 mph --> 2.5 hours

1.5x + 2.5(x+44)=206
1.5x+2.5x+110=206
4x=206-110
4x=96
x=24
Therefore, he was travelling at 24 mph in the fog.

2) Let x be the speed of 1 snail,
The other snail travels at the speed of x+1 cm/min

23x+23(x+1)=391 <-- solve for x
23x+23x+23=391
46x=368
x=368/46
x=8

Therefore one of the snail travels at 8 cm/min while the other goes at 9 cm/min

7) Let x be one crew
Then the other crew would be working at x+0.5

3.2x+3.2(x0.5)=8 <-- solve for x
3.2x+1.6x=8
4.8x=8
x=8/4.8
x=1.6666 or 1.7 miles

Therefore, one of the crew does 1.7 miles per day and the other crew does (0.5*1.7)=0.85 miles

Hope I helped :)

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Which graph shows the solution to the following system of inequalities x+y>4 x+y <3

LekaFEV [45]

Answer:

The following graph has no solution.

Step-by-step explanation:

Since , we are given a system of inequalities as:

x+y>4

and x+y<3

So from the two in equalities we could clearly see that in one the sum of x+y>4 while in the other the sun x+y<3 which is not possible.

This could also be seen from the graph.

The graph will not have any common region and are parallel lines.

Hence, the graph has no solution.

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3 years ago

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Equations don't really have x intercepts, functions or curves do. They're also known as the zeros of the function. When we set a function equal to zero we get an equation to solve, and the zeros of the function become the solutions or roots of the equation.

If a quadratic equation only has one root, that's a repeated root corresponding to a discriminant of zero.

In this example our equation is something like $2(x+3)^2=0$ , or expanded

$2x^2+12x + 18 = 0$

The discriminant $d=b^2-4ac$ here is

$d = 12^2 - 4(2)(18) = 0 \quad\checkmark$

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3 years ago

Grandma uses 2/3 of a pumpkin to make a pumpkin pie. How many pumpkins should she buy to make 4 pumpkin pies?

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2 years ago

Eric plays piano and guitar. He practiced on both instruments for a total of 8 hours this week. He practiced the piano for 3/4 o

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The correct result would be 6 hours.

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2 years ago

Perform the indicated operation. -10 + 15 -5 5 25 -25

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3 years ago

While driving from​ Chicago, Brent had a visibility problem due to the fog. After 1 1/2

While driving from Chicago, Brent had a visibility problem due to the fog. After 1 1/2