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Tema [17]
3 years ago
10

Which equation has roots of -1 and 2?

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
4 0

Answer:

(x+1) (x-2) = 0

Step-by-step explanation:

Roots = -1 and 2

This means

X = -1 or x = 2

(x + 1) = 0 or (x -2) = 0

Combine the two equations

(x+1) (x-2) = 0

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Frank ate 12 pieces of pizza and Dave ate 15 pieces. “I ate
kobusy [5.1K]

Answer:

Frank

Step-by-step explanation:

So If Dave ate ¼ more than Frank, you would need to divide the denominator by the amount of pizzas, so if 12÷4 is 3 he ate three more pizzas than Frank. If we do the same for Frank, ⅕ or 15÷5=3

So the correct answer would be Frank because 12 is less than 15

My apologies if this wasnt explained very well

7 0
4 years ago
The equation of a circle is . x2 + y2 + Cx + Dy + E = 0. If the radius of the circle is decreased without changing the coordinat
Neporo4naja [7]
To determine the effect of the radius changes to the coefficients, we need to rewrite the form of the equation into:

(x−α)²+(y−β)²=r² 
From the equation, we will see that:

C=−α∗2
D=−β∗2
and α²+β²−r²=E
where r represents the radius of the circle and α,βare the coordinate of the center of the circle.

Therefore, when the r decreases the coefficients C and D do not change but E increases.
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6 0
3 years ago
Read 2 more answers
From a ship, the angle of elevation of a point, A, at the top of a cliff is 21°. After the ship has sailed 2,500 feet directly t
fredd [130]

Answer:

10701.97 feet.

Step-by-step explanation:

Refer the attached figure

The angle of elevation of a point, A, at the top of a cliff is 21° i.e. ∠ACB = 21°

The ship has sailed 2,500 feet directly toward the foot of the cliff i.e. CD = 2500 feet.

Then the angle of elevation becomes 47° i.e.∠ADB = 47°

Let BD be x

So, BC = BD+DC=x+2500

Let the height of the cliff be h feet.

In ΔABD

We will use trigonometric ratios

tan\theta = \frac{Perpendicular}{Base}

tan47^{\circ} = \frac{AB}{BD}

1.072= \frac{h}{x}

1.072x=h    ---a

In ΔABC

We will use trigonometric ratios

tan\theta = \frac{Perpendicular}{Base}

tan21^{\circ} = \frac{AB}{BC}

0.869 = \frac{h}{x+2500}

0.869(x+2500) =h

0.869x+2172.5 =h   -----b

Equate a and b

0.869x+2172.5 =1.072x

2172.5 =1.072x-0.869x

2172.5 =0.203x

\frac{2172.5}{0.203}=x

10701.97=x

Thus the height of the cliff is 10701.97 feet.

4 0
3 years ago
What is the simplest form of of 4/12
VikaD [51]
You have to divide both the numerator and the denominator and you get 1/3 and thats the simplest form
7 0
3 years ago
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If m is the midpoint of ab find the coordinates of a if b(4,6) and m(1,2) A is pls help I need to know pls
KiRa [710]
A is (-2;2). Hope this helps
4 0
3 years ago
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