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9966 [12]
3 years ago
12

I need the steps please

Mathematics
1 answer:
Artemon [7]3 years ago
3 0

Answer:

20

Step-by-step explanation:

First, plug in -2 into each y:

3(-2)^2-4(-2)

Simplify 2^2 to 4:

3x4-4x-2

Simplify 3x4 to 12:

12-4x2

Simplify 4 x -2 to get -8:

12-(-8)

Remove parentheses:

12+8

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What’s is the perimeter of the following figure
NARA [144]

Answer:

8

Step-by-step explanation:

7 0
3 years ago
What is the solution set for the given inequality if the replacement set for r is {5, 6, 7, 8, 9, 10}?
Sophie [7]
Hi there! The answer is B.

5r \leqslant 6r - 8
Subtract 6r from both sides.

- r \leqslant  - 8
Divide both sides of the inequality by -1. Remember that dividing by a negative makes the sign flip.

r \geqslant 8
Therefore, the solution must be bigger than or equal to 8. From the given solution set, the answer is B. {8, 9, 10}

~ Hope this helps you!

3 0
3 years ago
What value of x makes this equation true? 15-7x=5x-21​
belka [17]

Answer:

x=3

Step-by-step explanation:

15-7x=5x-21

12x=36

x=3

4 0
3 years ago
Consider a candle that has a volume of 96 cubic inches and a weight of 44.16 ounces. What is the density of the candle? The dens
Ahat [919]

Answer:

1. 55.271 inches/lb

2. 3.075 inches/lb

3. The denser one is the pine, so it would be heavier.

Step-by-step explanation:

1. density of the pine log (which is a cylinder)

    We need the weight/mass and the volume.

    V(cylinder) = πr^2 * height

                       =  πr^2 = π(5^2) = 25π = 78.54

                       = 78.54 * 30 = <u>2356 cubic inches</u>

    The weight is 42.63.

  Density = mass/volume = 2356/42.63 = <u>55.271 inches/lb</u>

2. density of the oak board (which is a rectangular prism)

    We need the weight/mass and the volume.

    V(prism) = l*w*h

                   = 5.5*1.5*3 = <u>24.75 cubic inches</u>

    The weight is 8.05.

  Density = mass/volume = 24.75/8.05 = <u>3.075 inches/lb</u>

<u></u>

3. Picture a box made out of stone and a box made out of cardboard. Same dimensions, but the stone one would be way heavier because stone is denser.

6 0
4 years ago
What is sinB?<br><br><br>a. 15/17<br><br>b. 8/17<br><br>c. 8/15<br><br>d. 15/8
Mkey [24]

Answer:

\sf sin(B)= \dfrac{8}{17}

Explanation:

\hookrightarrow \sf sin(x)= \dfrac{opposite}{hypotensue}

<u>using the formula:</u>

\sf sin(B)= \dfrac{8}{17}

8 0
2 years ago
Read 2 more answers
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