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3 years ago

Henry drives at a speed of 80 miles per hour. How long will it take to drive 400 miles?

Mathematics

1 answer:

mart [117]3 years ago

4 0

Answer:

5hrs

Step-by-step explanation:

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Find the area of the shade regions. Give your answer as a completely simplify exact value in terms of pie(no approximation). a=

mr Goodwill [35]

Answer:

125.6 in²

Step-by-step explanation:

Area shaded :

2 × Sector (72°)
2 x πr² x θ/360
2 x 3.14 x 100 x 72/360
6.28 x 100 x 1/5
20 x 6.28
125.6 in²

4 0

2 years ago

Help, I'm doing rhis problem and need help checking if I'm right.

umka2103 [35]

To me it looks like your right

7 0

3 years ago

What are the coordinates of the x-intercepts of the parabola y = x² - 8x + 15?

tamaranim1 [39]

Answer:

(3, 0) and (5, 0)

Step-by-step explanation:

we have

$y=x^{2}-8x+15$

we know that

The x-intercepts are the values of x when the value of y is equal to zero

For y=0

$x^{2}-8x+15=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-8x+15=0$

$a=1\\b=-8\\c=15$

substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(1)(15)}} {2(1)}$

$x=\frac{8\pm\sqrt{4}} {2}$

$x=\frac{8\pm2} {2}$

$x=\frac{8+2} {2}=5$

$x=\frac{8-2} {2}=3$

x=3, x=5

therefore

The x-intercepts are (3,0) and (5,0)

4 0

3 years ago

Please help! Solve the inequality for x 3(x + 4) > 4 - X

Maurinko [17]

Answer:

x>-2

Step-by-step explanation:

3(x + 4) > 4 - X

Distribute

3x+12> 4-x

Add x to each side

3x+12+x > 4-x+x

4x+12 > 4

Subtract 12 from each side

4x+12-12>4-12

4x> -8

Divide each side by 4

4x/4 > -8/4

x>-2

6 0

3 years ago

Read 2 more answers

1/2 + 2/9 + 27/53 as a fraction

nalin [4]

Answer:

1175/954 there your answer

5 0

3 years ago