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aev [14]
3 years ago
5

Pls help w this question !! Determine the value of 2r² + r + 1 when: r= -0.2

Mathematics
2 answers:
AleksAgata [21]3 years ago
8 0
Its 0.4 is the answer it’s 0.4
Elena-2011 [213]3 years ago
3 0

Answer:

0.4

Step-by-step explanation:

2 x (-0.2) + (-0.2) + 1

- 0.4 - 0.2 + 1

-0.6 + 1

= 0.4

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- What is the range of the following set of points: {(3, 4), (7, - 2), (11, – 8)}?
konstantin123 [22]

Answer:

B) {-8,-2,3,4,7,11}

Step-by-step explanation:

range is y

3 0
3 years ago
A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Fi
sladkih [1.3K]

The ground, the building, and the ladder form a right triangle, in which
the leaning ladder is the hypotenuse.

For the angle between the ladder and the ground, the 4-ft along the ground
is the side adjacent to the angle, and the 7-ft ladder is the hypotenuse.

         (adjacent side) / (hypotenuse) = cosine of the angle.

                                         Cosine(a) = 4/7 = 0.57143... (rounded)

                                                    Angle 'a' = <em>55.15 degrees</em> (rounded)

7 0
3 years ago
Read 2 more answers
I need this problem worked out. I already know the answer just not the work.
larisa [96]

Answer

n = 30

Explanation

To solve for n, you have to isolate it by 'getting rid' of the 18, 2, and negative sign.

You 'remove' these numbers in backward PEMDAS.

So to 'remove' the 18, you subtract both sides by 18.

3-18 = -15

-n/2+18-18 = -n/2

So now you are left with -15 = -n/2.

To 'get rid' of the 2, you multiply each side by 2.

-15×2 = -30

-n/2×2 = -n

And now you have -30 = -n.

To 'get rid' of the negative sign, you multiply both sides by -1.

-30×-1 = 30

-n×-1 = n

So you get 30 = n or n = 30.

If you still have questions I'll answer them in the comments (under this question).

6 0
3 years ago
-10 · (-12) = <br> Find the product.
mars1129 [50]

Answer:

\huge{ \fbox{ \tt{120}}}

Step-by-step explanation:

\star{ \:  \sf{ \:  - 10 \: ⋅ \: ( - 12})}

\underline{ \text{Remember!}} :  \sf{Multiplying \: a \: negative \: integer \: by \: a \: negative \: integer \: gives \: a \: positive \: integer.}

\mapsto{ \sf{  \boxed{120}}}

Hope I helped!

Best regards! :D

~\sf{TheAnimeGirl}

6 0
3 years ago
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8 2/5 divided by -2 1/5 = ?
masya89 [10]

Answer:

-3.81818182 I think..

3 0
3 years ago
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