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Shalnov [3]
2 years ago
15

Your original grades on your exams were: 75, 85, 90, 90, 100, 75, 80, 100, 90. You retake the exams and now your scores are: 85,

85, 100, 90, 100, 85, 80, 100, 90. By how many percentage points did you improve your average score?​
Mathematics
1 answer:
lara [203]2 years ago
6 0

Answer:

Your average improved by 13 \frac{1}{3} %.

Step-by-step explanation:

First set:

(75 + 85 + 90 + 90 + 100 + 75 + 80 + 100 + 90) ÷ 9 = 77 \frac{2}{9\\} %

Second set:

(85 + 85 + 100 + 90 + 100 + 85 + 80 + 100 + 90) ÷ 9 = 90 \frac{5}{9} %

Improvement:

90 \frac{5}{9} % - 77 \frac{2}{9\\} % = 13 \frac{1}{3} %

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Show your working please.​
iren2701 [21]

Offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

<h3>What is a fraction?</h3>

Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.

We have:
2 bags for £35

2 bags means 50 kg (2×25)

Each kg cost = 35/50 = £0.7 per kg

3 bags for £92.50

3 bags means 150 kg

Each kg cost = 92.50/150 = £0.61 per kg

As we can see, offer B has a low cost per kg

Thus, offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

Learn more about the fraction here:

brainly.com/question/1301963

#SPJ1

6 0
2 years ago
What number is six and four hundredths larger than two and five tenths?
Nostrana [21]

Answer:

eight and thirty-seven fiftyths

Step-by-step explanation:

6 and 4/100 + 2 and 5/10

6 and 1/25 + 2 and 1/2

156 / 25 + 5 / 2

312 / 50 + 125 / 50

437 / 50

400 / 50 = 8

8 and 37 / 50

7 0
2 years ago
Malik wanted to make a cube frame out of a long wire 150 cm. If the volume of the cube is 2 197 cm³, is the length of the wire s
Rama09 [41]

Answer:

The wire is sufficient for making a cube of volume 2197 cm³

Step-by-step explanation:

Volume of cube = L³

Volume of the cube = 2197 cm³

Length of the wire = 150 cm

Let's see if the wire is sufficient for making a cube.

Volume of the cube that could be made from the wire is:

V = (L)³

V = (150)³

V = 3,375,000 cm³

So,

The volume of the cube using a 150 cm length wire is much more grater than 2197 cm³.

That is why, the wire is sufficient for making a cube of volume 2197 cm³.

4 0
2 years ago
The answers are 1. displacement <br> 2. speed <br> 3. velocity <br> 4. acceleration
Semmy [17]
Maybe it’s acceleration but I’m not sure cause to be honest it could be any of them but I picked acceleration because from 0 all the way to up is accelerating so yeah I really hope that helps and deepest apologies if my answer is wrong.
6 0
3 years ago
The prices (in dollars) of 12 electric smooth top ranges are listed below. Find the range for the given sample data. 865 1010 65
zepelin [54]

Answer:

Range = 910

Step-by-step explanation:

Given

Data: 865 1010 655 565 1465 1110 710 765 820 1310 555 1065

Required

Determine the range

Range is calculated as thus:

Range = Highest - Lowest

From the data,

Highest = 1465

Lowest = 555

Range = 1465 - 555

Range = 910

5 0
3 years ago
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