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3 years ago

Simplify the following. -(3z)2 A. 6z B. 9z2 C. -9z2 D. -6z2 E. 6z2

Mathematics

2 answers:

S_A_V [24]2 years ago

7 0

Answer:

-9x²

Step-by-Step explanation:

-(3x)²

In PEMDAS, we solve the exponent first then multiply.

-(3x)²

-(9x²)

-9x²

diamong [38]3 years ago

6 0

Answer:

a or b

Step-by-step explanation:

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John runs to the market and comes back in 15 minutes. His speed on the way to the market is 5m/s and his speed on the way back i

katen-ka-za [31]

Answer:

The distance to the market is 2000 m

Step-by-step explanation:

∵ John runs to the market and comes back in 15 minutes

→ Change the min. to the sec. because the unit of his speed is m/s

∵ 1 minute = 60 seconds

∴ 15 minutes = 15 × 60 = 900 seconds

→ Assume that t1 is his time to the market and t2 is his time from

the market

∵ t1 + t2 = 15 minutes

∴ t1 + t2 = 900 ⇒ (1)

→ Assume that the distance to the market is d

∵ His speed on the way to the market is 5m/s

∵ Time = Distance ÷ Speed

∴ t1 = d ÷ 5 ⇒ (1 ÷ 5 = 0.2)

∴ t1 = 0.2d ⇒ (2)

∵ His speed on the way back is 4m/s

∴ t2 = d ÷ 4 ⇒ (1 ÷ 4 = 0.25)

∴ t2 = 0.25d ⇒ (3)

→ Substitute (2) and (3) in (1)

∵ 0.2d + 0.25d = 900

∴ 0.45d = 900

→ Divide both sides by 0.45

∴ d = 2000 m

∴ The distance to the market = 2000 m

8 0

3 years ago

What is the volume of the prism? Use the formula V equals B h. Enter the answer in the box.

MakcuM [25]

Answer:

$29.4\ cm^3$

Step-by-step explanation:

b = 4 × 3.5 = 14 cm²

h = 2,1 cm

then

$V=b\times h$

$=14\times2.1$

$=29.4\ cm^3$

7 0

2 years ago

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To be eligible for financial aid, a student must earn at most $30,000 per year.

Svetllana [295]

s < 30,000$ i dont know if this is what the question is asking but its the best i can come up with given the information you gave to me.

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3 years ago

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Andrew rents bowling shoes for $4. He bowls 2 games. Andrew spent a total of $22. How much was the cost of each game, b? Complet

Aneli [31]

Answer:

2b + 4 = 22

b= 9, the cost of each game is $9

Step-by-step explanation:

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3 years ago

A factory begins the day with 6,000 packaged light bulbs. the machines in the factory can package 1,200 light bulbs every hour f

Alex_Xolod [135]

Answer:

If the factory starts with 6,000 packaged light bulbs at the beginning of the day, and the factory produces 1,200 light bulbs every hour for the next 5 hours then in 5 hours there will be 6,000 light bulbs.

6,000 + (1,200 x 5) = ?
6,000 + 6,000 = ?
? = 12,000 lightbulbs

Step-by-step explanation:

Have a great rest of your day
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2 years ago