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Black_prince [1.1K]

3 years ago

9

Roadway signs such as the one shown are used to warn drivers of an upcoming steep down grade. What is the grade, or slope, of th

e hill described on the sign?

1 answer:

Elis [28]3 years ago

8 0

8% is the grade so it’s not a big one

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(WILL MARK BRAINLEST!)

lukranit [14]

Answer:

1 $\frac{7}{20}$ more cups of flour

Step-by-step explanation:

5 0

3 years ago

Determine the equation of a circle whose diameter has the endpoints (-1, 2) and (7.

Viefleur [7K]

Answer:

(x - 3)^2 + (y + 1) = 25

Step-by-step explanation:

First find the midpoint of the diameter, because that represents the center of the circle.

-1 + 7

The x-coordinate of the midpoint is xm = ---------- = 3

2

2 - 4

and the y-coordinate is ym = ---------- = -1

2

And so the center of this circle is at (3, -1).

Use the Pythagorean Theorem to determine the square of the radius:

square of radius = 4^2 + (-3)^2 = 16 + 9 = 25

And so the equation of this circle is (x - 3)^2 + (y + 1) = 25

5 0

3 years ago

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MatroZZZ [7]

Sorry if it's wrong, I tried

6 0

2 years ago

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How to distribute this problem:<br> (x-8)^2 + 16

Usimov [2.4K]

Answer:

We conclude that:

$\left(x-8\right)^2+16=x^2-16x+80$

Step-by-step explanation:

Given the equation

$\left(x-8\right)^2\:+\:16$

First, solve (x - 8)²

Apply Perfect Square formula: (a - b)² = a² - 2ab + b²

$a=x,\:\:b=8$

$\left(x-8\right)^2=x^2-2x\cdot \:\:8+8^2$

$=x^2-16x+64$

so the expression becomes

$\left(x-8\right)^2+16=x^2-16x+64+16$

$=x^2-16x+80$ Add the numbers: 64+16=80

Therefore, we conclude that:

$\left(x-8\right)^2+16=x^2-16x+80$

4 0

3 years ago

How.to express the sum 21/9 in a whole number and fractions

JulijaS [17]

Answer:

2 1/3

Step-by-step explanation:

21/9 is 2.33 or 2 1/3

8 0

2 years ago