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3 years ago

Evaluate the expression w² - v + 1 for w = -2 and v = -8.

Mathematics

2 answers:

kaheart [24]3 years ago

7 0

Answer:

Step-by-step explanation:

-2(-2) - (-8) + 1

4 + 8 + 1 = 13

Roman55 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

cause i did it and it was right

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Which best explains why the equation 7x + 3 = 7x + 3 has infinitely many solutions?

DochEvi [55]

Answer:

Step-by-step explanation:

both sides are equal to begin with so any x that you put in, will get multiplied by 7 and have 3 added to it

7 0

3 years ago

30 POINTS AVAILABLE

kherson [118]

Answer:

$\large\boxed{(x-2)^2+(y-1)^2=34}$

Step-by-step explanation:

The equation of a circle in standard form:

$(x-h)^2+(y-k)^2=r^2$

(h, k) - center

r - radius

We have the endpoints of the diameter: (-1, 6) and (5, -4).

Midpoint of diameter is a center of a circle.

The formula of a midpoint:

$\left(\dfrac{x_1+x_2}{2};\ \dfrac{y_1+y_2}{2}\right)$

Substitute:

$h=\dfrac{-1+5}{2}=\dfrac{4}{2}=2\\\\k=\dfrac{6+(-4)}{2}=\dfrac{2}{2}=1$

The center is in (2, 1).

The radius length is equal to the distance between the center of the circle and the endpoint of the diameter.

The formula of a distance between two points:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Substitute the coordinates of the points (2, 1) and (5, -4):

$r=\sqrt{(5-2)^2+(-4-1)^2}=\sqrt{3^2+(-5)^2}=\sqrt{9+25}=\sqrt{34}$

Finally we have:

$(x-2)^2+(y-1)^2=(\sqrt{34})^2$

3 0

3 years ago

What is the slope of line x -3,-2,-1,0 y 6,4,20? PLEASE HELP ASAP

alekssr [168]

Answer: y=-2x
Solution:

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3 years ago

What is the answer for 3.7-4.2n-3n+8

Romashka-Z-Leto [24]

The Answer:

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2 years ago

What is the best approximation for the perimeter of a semicircle with a dimeter of 12cm?

taurus [48]

Answer is choice B: the circumference of a circle is the same as perimeter and is defined by πd (or pi times diameter) We can cut this in half because we are working with a semicircle: so we have 6π which approximates to the value in answer when using 3.14 for pi Woops: forgot to add the diameter of 12 so we would have 30.84

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3 years ago