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3 years ago

Simplify each expression4sg/-5gand(8 + 7a) + 4

Mathematics

1 answer:

Yanka [14]3 years ago

5 0

$\dfrac{4sg}{-5g}=-\dfrac{4}{5}\cdor\dfrac{sg}{g}=-\dfrac{4}{5}s\\\\(8+7a)+4=7a+(8+4)=7a+12$

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Jen bought 5 CDs for $57.50, what was the unit price

frez [133]

Answer:

$11.50. Each CD cost $11.50.

Step-by-step explanation:

When trying to determine how much each CD cost, we need to know our total cost, $57.50, and how many CDs were bought, 5.

Since 5 CDs cost $57.50, we can divide our total cost by the number of CDs purchased to find the cost of each CD. 57.50 / 5 = 11.50

8 0

3 years ago

A candle burned at a steady rate. After 33 minutes, the candle was 11.2 inches tall. Eighteen minutes later, it was 10.75 inches

Amiraneli [1.4K]

Answer:

9.025 inches

Step-by-step explanation:

Let the length be represented by:

$L = mt+L_0$

Where $L$ is the length of candle at time $t$

$m$ is the rate at which the candle is burning.

And $L_0$ is the initial length of the candle.

As per the question statement, let us put the given values in the equation.

$11.2 = m\times 33 + L_0 .... (1)\\10.75 = m\times 51+L_0 ..... (2)$

Subtracting (1) from (2):

$0.45 = -18m\\\Rightarrow m = -0.025$

Putting the value of $m$ in the equation (1):

$11.2 = -0.025 \times 33+L_0\\\Rightarrow L_0 = 12.025$

Therefore, the equation becomes:

$L = -0.025t + 12.025$

Now, we have to find the height of candle after 2 hours.

2 hours mean 120 minutes.

$L = -0.025 \times 120 + 12.025\\\Rightarrow L = 9.025\ inches$

Therefore, the height of candle is <em>9.025 inches</em>.

3 0

2 years ago

Yoga classes are offered 2 days a week for 6 weeks at both the community center and the local gym. The cost for the classes at t

s344n2d4d5 [400]

Regina can take yoga classes at community center as it would cost her less money.

Step-by-step explanation:

No. of classes per week = 2

Classes in 6 weeks = 2*6 = 12 classes

Cost of classes at community center = $72

Additional one time fee = $12

Total cost at community center = 72+12 = $84

Cost per class at local gym = $8

Cost of 12 classes = 12*8 = $96

Regina can take yoga classes at community center as it would cost her less money.

Keywords: addition, multiplication

Learn more about addition at:

#LearnwithBrainly

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3 years ago

Katrina buys a 38-ft roll of fencing to make a rectangular play area for her dogs. Use 2(l+w)=38 to write a function for the

jenyasd209 [6]

Answer:

i dont know

Step-by-step explanation:

68 maybbe

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2 years ago

Write the equation 2x2 - 4x + 6 = 1 in standard form and then choose the value of "c."

3241004551 [841]

Answer:

c = 5.

Step-by-step explanation:

2x^2 - 4x + 6 = 1

Subtract 1 from both sides.

2x^2 - 4x + 5 = 0

c = 5.

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3 years ago