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2 years ago

I need help 7th grade math i need all the answers correct please ASAP

Mathematics

2 answers:

Solnce55 [7]2 years ago

6 0

Answer:

7.98: $2.51/kg
8.39: $2.43/kg
the 8.39 kg bag is the better buy

Step-by-step explanation:

To find the unit price, divide the price by the number of units. Here, the unit of interest is 1 kg.

Unit price of 7.98 kg bag:

$19.99/(7.98 kg) = $2.51 /kg

Unit price of 8.39 kg bag:

$20.38/(8.39 kg) = $2.43 /kg

The 8.39 kg bag has a lower cost per kilogram, so is considered the better buy.

vitfil [10]2 years ago

4 0

Answer:

The 8.39-kg bag

Step-by-step explanation:

19.99 divided by 7.98 = $2.51

20.38 divided by 8.39 = $2.43

2.51 > 2.43

So 8.39-kg bag is the better buy

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3 years ago

What is the answer to 2+b=7

Natasha_Volkova [10]

Answer:

b=5

Step-by-step explanation:

2+b=7

Subtract 2 from each side

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7 0

3 years ago

Over winter break, Raymond worked 12.5 hours at the library and 20.5 hours at a café. The library paid him $13 per hour. If he e

svet-max [94.6K]

Answer:

14.5

Step-by-step explanation:

the cafe paid him 14.5 an hr

6 0

3 years ago

The perimeter of a rectangular deck measured 130 m. What are the possible

fomenos

Answer:

The possible dimensions of the deck can be anything that adds up to be 130 m.

Step-by-step explanation:

<em>The perimeter could be 1m x 64m.</em>

Two sides would be 1m each (so 2m total) and the other two sides would be 64m each (128m total). 2 + 128 = 130m.

<em>The perimeter could be 15m x 50m.</em>

Two sides would be 15m each (so 30m total) and the other two sides would be 50m each (100m total). 30 + 100 = 130m.

8 0

3 years ago

A pan is heated to 393°F, then removed from the heat and allowed to cool in a kitchen where the room temperature is a constant 6

deff fn [24]

Answer:

The approximate temperature of the pan after it has been away from the heat for 9 minutes is 275.59°F.

Step-by-step explanation:

The formula for D, the difference in temperature between the pan and the room after t minutes is:

$D = 324\cdot e^{-0.05t}$

Compute the approximate difference in temperature between the pan and the room after 9 minutes as follows:

$D = 324\cdot e^{-0.05t}$

$=324\times e^{-0.05\times 9}\\\\=206.59$

Then the approximate temperature of the pan after it has been away from the heat for 9 minutes is:

D = P - R

206.59 = P - 69

P = 206.59 + 69

P = 275.59°F

Thus, the approximate temperature of the pan after it has been away from the heat for 9 minutes is 275.59°F.

6 0

3 years ago