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3 years ago

14

When the expression x^2+2x-8 is factored the two roots will equal

1 answer:

Vilka [71]3 years ago

5 0

x^2+2x-8

(x+4) (x-2)

x=-4, x=2

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Find the area of the circle to the nearest whole number, if necessary.

creativ13 [48]

Answer:

Area of a Circle = πr²

R=Diameter/2

=21mm

=π(21)²

=1385.44mm²

To the nearest whole number

= 1385mm²

The answer is in mm². It may differ if the given answer is in m². You can get this by converting your radius to meters. This is done by dividing 21mm by 1000.

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4 0

4 years ago

Read 2 more answers

family has a square driveway with an area of 210.25 m exponent 2. Find the perimeter of the driveway. Round your answer to the n

miv72 [106K]

Answer:

191 ft.

Step-by-step explanation:

From the question given above, the following data were obtained:

Area (A) of square = 210.25 m²

Perimeter (P) =?

Next, we shall determine the length of each side of the drive way. This can be obtained as follow:

Area (A) of square = 210.25 m²

Length (L) =?

Area of a square is given by:

A = L²

210.25 = L²

Take the square root of both side

L = √210.25

L = 14.5 m

Thus, the length of each side of the drive way 14.5 m

Next, we shall determine the perimeter of the drive way. This can be obtained as follow:

Length (L) = 14.5 m

Perimeter (P) of square =?

Perimeter of a square is given by:

P = 4L

P = 4 × 14.5

P = 58 m

Finally, we shall convert 58 m to foot. This can be obtained as follow:

1 m = 3.3 ft

Therefore,

58 m = 58 m × 3.3 ft / 1 m

58 m = 191.4 ft

58 m = 191 ft

Thus, 58 m is equivalent to 191 ft.

Therefore, the perimeter of the drive way is 191 ft.

8 0

3 years ago

Two truckers leave from the same point driving in opposite directions, the first trucker driving at 62 miles per hour and the s

Elodia [21]

Answer:

1 hour 42 minutes

Step-by-step explanation:

Given: Speed of 1st trucker= 62 mph

Speed of 2nd trucker= 66 mph

Total distance need to cover to be in contact is 270 miles

1st trucker start 1 hour ahead of 2nd trucker

Lets assume 2nd trucker take `x` hours to be in contact and 1st trucker take `(x+1)` hours.

We know, distance= $speed\times time$

1st trucker, distance $(d_1)= 62\times (x+1)$

∴ $d_1= 62x+62$

2nd trucker, distance $(d_2)= 66\times x$

∴ $d_2= 66x$

Now, putting the values in an equation.

$d_1+d_2= 270$

⇒ $(62x+62)+66x= 270$

Opening the parenthesis to solve and subtracting both side by 62

⇒ $122x= 208$

∴ x= $\frac{208}{122} = 1.70\ h$ = 1 hour 42 minutes

∴ It will take 1 hour 42 minutes to be able contact each other after first trucker leaves.

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3 years ago

Solve this equation: 3x – 5 - x = 134

Zepler [3.9K]

Answer:

(3x - x) :v

Step-by-step explanation:

3x - 5 - x =134

2x - 5 = 134

2x = 139

x = 139/2

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3 years ago

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