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romanna [79]
3 years ago
14

What would -2 - (-7) be? And how would you do that

Mathematics
1 answer:
zavuch27 [327]3 years ago
8 0

Answer:

5

Step-by-step explanation:

Okay, so adding negative numbers can get very tricky, but I think I can help

Since there are two negative signs next to each other, they both cancel out and become positive so instead you get

-2+7

And if you do this with a number line, if you start and negative 2 and keep going right 7 times, you get 5

I hope I helped! I know negative numbers can be really difficult, but once you get the hang of it I bet you'll be great!

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20 points!
Arte-miy333 [17]

Answer:

Step-by-step explanation:

hypotenuse=2*AB

where AB is the smallest side.

Take AB as the base .

Draw a perpendicular at B.

A as the center and cut an arc AC=2 AB

Join AC.

CAB is the reqd. triangle.

5 0
3 years ago
The general form of an parabola is 2x2−12x−3y+12=0 .
Murljashka [212]

Answer:

The standard form of the parabola is (x-3)^2=4*\frac{3}{8}(y+2)

Step-by-step explanation:

The standard form of a parabola is

(x-h)^2=4p(y-k).

In order to convert 2x^2-12x-3y+12=0 into the standard form, we first separate the variables:

2x^2-12x+3y+12=0\\\\2x^2-12x+12=3y

we now divided both sides by 2 to remove the coefficient from 2x^2 and get:

x^2-6x+6=\frac{3}{2}y.

We complete the square on the left side by adding 3 to both sides:

x^2-6x+6+3=\frac{3}{2}y+3

x^2-6x+9=\frac{3}{2}y+3

(x-3)^2=\frac{3}{2}y+3

now we bring the right side into the form 4p(y-k) by first multiplying the equation by \frac{2}{3}:

\frac{2}{3} *(x-3)^2=\frac{2}{3} *(\frac{3}{2}y+3)\\\\\frac{2}{3} *(x-3)^2=y+2

and then we multiplying both sides by \frac{3}{2} to get

(x-3)^2=\frac{3}{2} (y+2).

Here we see that

4p=\frac{3}{2}

\therefore p=\frac{3}{8}

Thus, finally we have the equation of the parabola in the standard form:

\boxed{(x-3)^2=4*\frac{3}{8}(y+2)}

5 0
3 years ago
BRAINLEST IF ANSWERED QUICKLY AND CORRECT
Feliz [49]

Answer:

i think its b i'm not entirely sure

Step-by-step explanation:

3 0
3 years ago
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Helen [10]
1. 0.75
2. 0.54
3. 0.1875
4. 0.25
5. 016
3 0
2 years ago
Read 2 more answers
  (20 points!!!) Please help me answer this question it’s important. I already know the answer I just need the working! The an
Debora [2.8K]

Answer:this is tricky make me brainlest

then i shall answer Step-by-step explanation

7 0
3 years ago
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