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Sladkaya [172]
3 years ago
14

15+21b Please help me, i suck at math

Mathematics
1 answer:
Masteriza [31]3 years ago
6 0

Answer:

Step-by-step explanation:

okay so i’m not 100% sure on how to do this but i think you can just add the two together? like 15 + 21 + b. like that’s be 36b. so i’m not sure if that’s how you do it but i think you can do it that way?

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Help me i need a 67 atleast because i need to get good grade!!11111!!!!!11
Len [333]

Answer:

$0.02

Step-by-step explanation:

20/1,000 = 0.02

5 0
3 years ago
It costs $6.45 to buy 5 songs on I-tunes. How much does it cost to buy 20 songs?
babunello [35]

Answer:$25.80

Step-by-step explanation:

6.45/5 = 1.29

1.29 x 20 =25.80

5 0
2 years ago
Consider this quadratic equation<br> X^2+2x+7=21
nadya68 [22]

Answer:

x = sqrt(15) - 1 or x = -1 - sqrt(15)

Step-by-step explanation:

Solve for x:

x^2 + 2 x + 7 = 21

Subtract 7 from both sides:

x^2 + 2 x = 14

Add 1 to both sides:

x^2 + 2 x + 1 = 15

Write the left hand side as a square:

(x + 1)^2 = 15

Take the square root of both sides:

x + 1 = sqrt(15) or x + 1 = -sqrt(15)

Subtract 1 from both sides:

x = sqrt(15) - 1 or x + 1 = -sqrt(15)

Subtract 1 from both sides:

Answer: x = sqrt(15) - 1 or x = -1 - sqrt(15)

8 0
3 years ago
When a figure is rotated, does every point move the same distance? Explain.
scoray [572]

Answer:

D. No. Although each point is rotated through the same angle, points that are different distances from the center of rotation move different distances.

Step-by-step explanation:

Rotation is a type of transformation which involves turning a given figure about a reference point to produce its image. This would produce an image with the same size as the object.

A given figure or shape has different parts or points. Since each point on the figure is at different distance to the reference point, thus they do not cover the same distance but move through the same angle of rotation. Each individual point move through the same angle but do not cover the same distance during rotation.

Therefore, the appropriate option is D.

8 0
3 years ago
The cost for a pack of 12 pencils is $3.24 . find the unit price in dollars per pencil. if necessary, round your answer to the n
Llana [10]
To getyour answer, just divided 3.24 by 12. You will get 0.27. So the answer is each pencil costs 27 cents or 0.27.
4 0
3 years ago
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