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irina1246 [14]
3 years ago
12

(3x - 5 - 7x^2) - (-2 + 6x^2 - 5x)​

Mathematics
2 answers:
boyakko [2]3 years ago
7 0

Answer:

-13x^2+8x-3

Step-by-step explanation:

AfilCa [17]3 years ago
5 0

Answer:

-13x2 + 8x - 3

Step-by-step explanation:

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PLEASE help me with this question! This is really urgent! No nonsense answers please, and answer with full solutions!
juin [17]

Answer:0.80

Step-by-step explanation:please i don't really know how to explain this i am very sorry

7 0
2 years ago
State the first 3-digit multiple of 7​
Elis [28]
Da answer is 7, 14, 21
5 0
3 years ago
Please please please help. thank you.
djverab [1.8K]
Lets get started :)


The First question:
Diameter = 20 ft
Radius = \frac{1}{2} of 20 (diameter) = 20 ft

Area formula of a circle is
A = \pir²
    =\pi(10)²
    =100\pi ft²
    ≈ 314 ft²

The answer will be the second option

The Second question:
radius of circle = 12mm  divided into 20 sectors area

A = \pir²
   = \pi(12)²
   = 144\pi ft²

Divide into 20 equal sector areas = \frac{144 \pi }{20} = 7.2 \pi

≈ 22.6 mm²

Your answer will be the third option

The Third Question:

90°, sector area = 36\pi , Radius = ?

\frac{angle}{360} = \frac{sector}{ \pi (r)^2}
\frac{90}{360} = \frac{36 \pi }{ \pi r^2}
\pi and \pi cancels out

We can now cross multiply
360 × 36 = 90r²
12960 = 90r²

Divide by 90 on either side

\frac{12960}{90} = \frac{90r^2}{90}
144 = r²

Take squareroot 
 \sqrt{144} = x
x = 12 in

Your answer will be the third option




4 0
3 years ago
The sum of 3 times a number and 7
leva [86]
Algebraically, that will be expressed as:

3n +7
7 0
3 years ago
PLEASE HELP ANSWER FOR BRAINLIEST AND *EXPLAIN* :)
Gnesinka [82]
Since it’s supplementary the straight line would equal to 180 degrees

4d - 1 + 105 = 180
4d + 104 = 180
4d = 76
d = 19
7 0
2 years ago
Read 2 more answers
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