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denpristay [2]
3 years ago
12

Simplify the expression -3 divided by -2/5.

Mathematics
1 answer:
Romashka [77]3 years ago
5 0
You can either convert -3 into a fraction, or convert -2/5 into a decimal so you can solve this.
If you decide to convert -3, into a fraction, it would be -3/1, and you'd have to multiply that by the reciprocal of -2/5.
So, you'd have -3/1(-5/2)=15/2, which can be simplified to 7 1/2.
If you decide to convert -2/5 into a decimal, you would get -0.4. You would then divide -3 by -0.4, which is equal to 7.5.
Both 7.5 and 7 1/2 are correct answers, and if you were to convert 7.5 into a fraction and 7 1/2 into a decimal, you would notice that they are the same number, but in different forms.
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The height of a square pyramid-shaped gift box is one half the length of
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Answer:

15 inches

Step-by-step explanation:

Volume of a squre based pyramid :

V = a²(h/3)

a = base edge ; h = height

h =1/2 a

V = 4500

4500 = a² * (1/2a) ÷ 3

4500 = a² * a/2 * 1/3

4500 = a³/2 * 1/3

4500 = a³ / 6

27000 = a³

27000 = a³

Take the cube root of both sides

(27000)⅓ = a

30 = a

Recall:

h = 1/2a

h = 1/2(30)

h = 15 inches

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3 years ago
624,612 rounded to the nearest hundred is
lord [1]

Answer:

624,600

Step-by-step explanation:

624,612

612 rounds to 600

624,600

8 0
3 years ago
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gavmur [86]
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8 0
3 years ago
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If x=3 what is the value of y in this equation?
inn [45]

Answer:

\displaystyle \large{y=36}

Step-by-step explanation:

We are given the equation \displaystyle \large{y=12x}. To find y-value when or at x = 3, simply substitute x = 3 in which gives us \displaystyle \large{y=12(3)} then evaluate the value as we obtain the y-value or final answer to the question:

\displaystyle \large{\boxed{y=36}}

If you have any questions about this question or for clarification, do not hesitate to ask in comment!

6 0
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Madison bought her Grandfather a new hat for his birthday. The hat cost $12.99 and was hanging on the 50% clearance rack. How mu
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Answer:

the hat would cost $6.495 which if you round the answer it would be $6.50

Step-by-step explanation:

12.99*50%=12.900*.50=6.495 round to 6.50

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