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3 years ago

"Name the property:a + (b+12) = (a+b) + 12"

Mathematics

1 answer:

vfiekz [6]3 years ago

8 0

Answer:

This property would be the Associative property of addition.

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Rico thinks it's a perfect square triinomiall. Teresa says it's the difference of two squares. Who is

Naya [18.7K]

Answer: Rico is right.

(-1)(3x + 5)²

Step-by-step explanation: If it were the difference of two squares, the -30x would not be there.

It makes sense to factor out (-1) fry the trinomial, leaving all positive terms.

Then factor 9x² + 30x + 25 as

(3x + 5)²

7 0

3 years ago

A group of 40 children attended a baseball game on a field trip. Each child received either a hot dog or bag of popcorn. Hot dog

Colt1911 [192]

Answer:

27 hot dogs

13 popcorns

Step-by-step explanation:

(2.25 x 27) + (1.75 x 13)

60.75 + 22.75

= 83.50

8 0

3 years ago

If you are going 43.5 miles per hour how many feet per second are you traveling?

Olenka [21]

Answer:

63.7999... (repeating) fps

Step-by-step explanation:

Feet per second (fps) per one (1) mph is 1.4666... repeating

so 43.5 * 1.46666... = 63.7999.. repeating

hope this helps:)

5 0

2 years ago

Beaker A contains 1 liter which is 30 percent oil and the rest is vinegar, thoroughly mixed up. Beaker B contains 2 liters which

alekssr [168]

Answer:

1.25 liters of oil

Step-by-step explanation:

Volume in Beaker A = 1 L

Volume of Oil in Beaker A = 1*0.3 = 0.3 L

Volume of Vinegar in Beaker A = 1*0.7 = 0.7 L

Volume in Beaker B = 2 L

Volume of Oil in Beaker B = 2*0.4 = 0.8 L

Volume of Vinegar in Beaker B = 1*0.6 = 1.2 L

If half of the contents of B are poured into A and assuming a homogeneous mixture, the new volumes of oil (Voa) and vinegar (Vva) in beaker A are:

$V_{oa} = 0.3+\frac{0.8}{2} \\V_{oa} = 0.7 \\V_{va} = 0.7+\frac{1.2}{2} \\V_{va} = 1.3$

The amount of oil needed to be added to beaker A in order to produce a mixture which is 60 percent oil (Vomix) is given by:

$0.6*V_{total} = V_{oa} +V_{omix}\\0.6*(V_{va}+V_{oa} +V_{omix}) = V_{oa} +V_{omix}\\0.6*(1.3+0.7+V_{omix})=0.7+V_{omix}\\V_{omix}=\frac{0.5}{0.4} \\V_{omix}=1.25 \ L$

1.25 liters of oil are needed.

6 0

3 years ago

What are the scores of the students which are less than equal to 25% of the data? <br>

nikitadnepr [17]

Answer:

24/100

Step-by-step explanation:

7 0

3 years ago