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3 years ago

You are wanting to improve your grade in a future class. Your goal is to have at least an 80% in this class.

Mathematics

1 answer:

yan [13]3 years ago

3 0

Answer:

Yes,

You need 88 points.

Step-by-step explanation:

What you need to do here is to set up an equation using algebra (I do this in my master's degree to determine my grade).

$\frac{x}{.80}$ = 400

x = 320

Your target required points is 320.

320 - 232 = 88 points.

You need 88 points on the exam to get the 80%.

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kim buys pet food in 1.5kg packs, het pet needs 0.8kg of food each week. She wants to have enough food for the next 14 weeks. Sh

cricket20 [7]

<h3>Answer: 6</h3>

========================================================

Explanation:

"She already has two 1.5kg packs" means she already has 2*1.5 = 3 kg of food.

The statements "her pet needs 0.8 kg of food each week" and "She wants to have enough food for the next 14 weeks" tell us that she needs 0.8*14 = 11.2 kg of food total.

--------------------------------

Let,

x = number of packs she needs to buy

1 pack = 1.5 kg of food

x packs = 1.5x kg of food

Add on the 3 kg of food she already has to get 1.5x+3

The expression 1.5x+3 represents how much food she'll have total after buying x packs.

Set this equal to 11.2 and solve for x

1.5x+3 = 11.2

1.5x+3-3 = 11.2-3 ... subtracting 3 from both sides

1.5x = 8.2

1.5x/(1.5) = 8.2/(1.5) .... dividing both sides by 1.5

x = 5.4667 approximately

x = 6 rounding up to the nearest whole number

We round up instead of down.

This is because if x = 5, then,

1.5*x+3 = 1.5*5+3 = 7.5+3 = 10.5, but this is less than 11.2

However, if x = 6, then,

1.5*x+3 = 1.5*6+3 = 9+3 = 12 which clears the hurdle of 11.2

So this means buying 6 packages of food is the smallest amount needed to ensure her pet has enough food for the next 14 weeks.

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masha68 [24]

<u>Solution-</u>

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3 years ago

Read 2 more answers