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SCORPION-xisa [38]
3 years ago
5

Help need to get done by tomorrow

Mathematics
2 answers:
nalin [4]3 years ago
4 0

Answer:

<h2>13a - 3</h2>

Step-by-step explanation:

7a - (4a - 8a + 3) + 2a

= 7a - 4a - (-8a) - 3 + 2a

= 7a - 4a + 8a - 3 + 2a     <em>combine like terms</em>

= (7a - 4a + 8a + 2a) - 3

= (7 - 4 + 8 + 2)a - 3

= 13a - 3

r-ruslan [8.4K]3 years ago
3 0

Answer:

13a-3

Step-by-step explanation:

7a-(4a-8a+3)+2a              First, distribute the negative 1.

7a-4a+8a-3+2a                Combine like terms.

13a-3

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Sandy surveyed band students to determine the music for the school dance. Many students were unhappy with the selection. What mi
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Answer: C.)The survey should include all music choices.

Step-by-step explanation: To be honest i'm not sure-.

8 0
2 years ago
It's 12 points of u get this right<br>​
earnstyle [38]

Answer:

y = -2x + 8

Step-by-step explanation:

When two points are given, the equation of the line passing through the points is given by:

        $ \frac{y - y_1}{y_2 - y_1} = \frac{x - x_1}{x_2 - x_1} $

where: $ (x_1,y_1) $ and $ (x_2,y_2) $ are the two points passing through the line.

Here, $ (x_1,y_1) = (2,4) $ and $ (x_2, y_2) = (3,2) $.

Substituting in the formula, we have:

$ \frac{y - 4}{2 - 4} = \frac{x - 2}{3 - 2} $

⇒ $ \frac{y - 4}{-2} = \frac{x - 2}{1} $

⇒ y - 4 = -2x + 4

⇒ y = -2x + 8 is the required equation of the line.

4 0
4 years ago
_______ samples are used to ensure representation from different types of subgroups in a population.
atroni [7]

Answer:

d

Step-by-step explanation:

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5 0
3 years ago
The point P = (-3, y) lies on the unit circle shown below. What is the value of y
alukav5142 [94]

The equation of the circle is given as (x-h)² + (y-k)² = r². Then the value of y will be ± √5/3.

<h3>What is an equation of a circle?</h3>

A circle can be characterized by its center's location and its radius's length.

Let the center of the considered circle be at (h, k) coordinate.

Let the radius of the circle be 'r' units.

Then, the equation of that circle would be:

(x-h)² + (y-k)² = r²

The equation of the circle has the center at the origin and the radius is one unit. Then we have

x² + y² = 1

The point P = (-2/3, y) lies on the unit circle. Then the value of y will be

(-2/3)² + y² = 1

y² = 1 - 4/9

y² = 5/9

y = ± √5 / 9

Learn more about the equation of a circle here:

brainly.com/question/10165274

#SPJ1

5 0
2 years ago
If 25% of a number is 100, what is the number?
Mkey [24]

Answer:

OE. 400

Step-by-step explanation:

.25*400=100

(If you don't believe me, do it out.)

<em><u>Hope this helps!!!</u></em>

<em><u>Brady</u></em>

5 0
3 years ago
Read 2 more answers
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