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zalisa [80]
3 years ago
15

Can someone help me with this question

Mathematics
1 answer:
Flura [38]3 years ago
7 0
The answer is A or c I’m probs wrong
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Jody practiced a piano piece for 500 seconds bill practiced a piano piece for 8 minutes who practiced longer explain
Mrac [35]

Answer:

Jody

Step-by-step explanation:

You can either convert 500 seconds to minutes or 8 minutes to seconds to compare. I'll do both.

There is 60 seconds in a minute. To find the total minutes of 500 seconds, divide 500 by 60 → 8.3, which means that Jody practiced for 8.3 minutes.

To find the total seconds of 8 minutes, multiply 60 seconds per minute by 8 minutes → 60 * 8 = 480 seconds which means that Bill practiced for 480 seconds.

Now you can compare. Jody practiced for 500 seconds, or 8.3 minutes. Bill practiced for 480 seconds, or 8 minutes. Jody practiced longer.

7 0
3 years ago
Identify the variable(s), set up your equation(s), and solve. Richard has an elder sister who is twice his age and a younger sis
alexdok [17]

Answer:

7 years

Step-by-step explanation:

Given that:

Let Richard's age = x

Elder sister's age = 2x

Youngwr sister's age = x - 2

Product of sisters ages = 70

2x * (x - 2) = 70

2x² - 4x = 70

2x² - 4x - 70 = 0

x² - 2x - 35 = 0

x² - 7x + 5x - 35 = 0

x(x - 7) +5(x - 7) = 0

(x - 7) or (x + 5) = 0

x = 7 or x = - 5

X can't be negative

Hence, x = 7

Richard is 7 years

3 0
3 years ago
What is the property of (4 + 7) + 8 = 4 + (7 +8) ?
nasty-shy [4]

Answer:

Commutative

Step-by-step explanation:

2 + 4 = 4 + 2 as an example

4 0
2 years ago
Kelly’s scores for the last seven quizzes are 92,77,83,80,97,88, and 78 what is her mean quiz score
Allushta [10]

Answer:

80

Step-by-step explanation:

80 is the main score I think.....

4 0
3 years ago
Read 2 more answers
1. Is -7+9=-9+7 true, false , or open?
Tju [1.3M]

1. false

2. idk

3. its C

4. idk

6 0
3 years ago
Read 2 more answers
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