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Len [333]
3 years ago
9

-3+m/3=12 how do I solve this

Mathematics
2 answers:
ValentinkaMS [17]3 years ago
4 0
Answer : m = 13
....................................

timama [110]3 years ago
3 0
First: You add 3 to each side. Second: You multiply each side by 3. Third: You gaze in wondrous amazement at the answer, which lies revealed before you on the page.
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The sum of a number 9 is multiplied by -2 and the answer is -8 <br><br>find the number.
GalinKa [24]
<h3><u>The missing number is equal to -5.</u></h3>

-2(x + 9)  = -8

<em><u>Distributive property.</u></em>

-2x - 18 = -8

<em><u>Add 18 to both sides.</u></em>

-2x = 10

<em><u>Divide both sides by -2.</u></em>

x = -5

8 0
3 years ago
100 envelopes cost $0.70 how much would it be for 250
34kurt
It costs 1.75$ for 250 envelopes. each one of the envelopes cost 0.007$
7 0
3 years ago
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I need help with this question please
german

Answer:

C.

Step-by-step explanation:

Given

A =(x_1,y_1)

B =(x_2,y_2)

C =(x_3,y_3)

D =(x_4,y_4)

Required:

Which condition proves that AB is perpendicular to CD

First, calculate the slopes of both.

<u>For AB</u>

m_1 = \frac{y_2 -y_1}{x_2 - x_1}

<u>For CD</u>

m_2 = \frac{y_4 -y_3}{x_4 - x_2}

The condition of perpendicularity is:

m_1 * m_2 = -1

Substitute values for m1 and m2

\frac{y_2 -y_1}{x_2 - x_1} * \frac{y_4 -y_3}{x_4 - x_2} = -1

Option (c) is correct

8 0
3 years ago
A. 11 cm^3<br> B. 14 cm^3<br> C. 15 cm^3<br> D. 25 cm^3
IgorLugansk [536]
Lets get started :)

We need to find the radius of the larger cylinder

V = \pir²h
960 = \pir²(16)
\frac{960}{16} = \pi r^2
60 = \pi r^2
\frac{60}{ \pi } = r^2
r = \sqrt{ \frac{60}{ \pi } }
r ≈ 4.27 cm

The ratio of the bigger cylinder to smaller is:
16 : 4

Therefore, the big cylinder is 4 times bigger than the small cylinder

\frac{4.37}{4} = r
r = 1.09 cm (radius of small cyclinder)

V (small cylinder) = \pi(1.09)²(4)
                             = 15 cm³

Your answer will be C. 15 cm³

3 0
3 years ago
Read 2 more answers
What is the value of x?<br><br><br><br> Enter your answer in the box.
madam [21]

Answer:

x = 21

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the given angles and equate to 180, that is

x -4 + 3x + 100 = 180, that is

4x + 96 = 180 ( subtract 96 from both sides )

4x = 84 ( divide both sides by 4 )

x = 21

3 0
3 years ago
Read 2 more answers
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