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3 years ago

Five friends take a maths test

Mathematics

1 answer:

gulaghasi [49]3 years ago

3 0

Answer:

Adam scored 60, Brandon scored 66, Chen scored 74, Damion scored 75, and Erica scored 75.

Step-by-step explanation:

Since five friends took the maths test, and Adam, Brandon, and Chen together together scored 200 marks; Brandon, Chen and Damion together scored 215; Chen, Damion and Erica together scored 224; and Damion and Erica scored more than Chen; While the five of them together scored 350 marks, to determine what are their individual scores the following calculations must be performed:

Adam + Brandon + Chen = 200

Damion + Erica = 150

Brandon + Chen + Damion = 215

Adam + Erica = 135

Chen + Damion + Erica = 224

Adam + Brandon = 126

Adam + Brandon = 126 + Chen = 200

Chen = 200 - 126

Chen = 74

Damion and Erica scored more than Chen

Chen + Damion + Erica = 224

74 + Damion + Erica = 224

Damion + Erica = 150

Damion = 75

Erica = 75

Brandon + Chen + Damion = 215

Brandon + 74 + 75 = 215

Brandon = 215 - 74 - 75

Brandon = 66

Adam = 350 - 75 - 75 - 74 - 66

Adam = 60

Therefore, Adam scored 60, Brandon scored 66, Chen scored 74, Damion scored 75, and Erica scored 75.

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What is the area of a square with side lengths of 3/5 units?

umka2103 [35]

Answer:

We must solve 3/5 x 3/5.

3/5 x 3/5 = 0.36

The units we'll use is because units are the unt we're given, and it is squared because it is the area of a shape.

Your final answer is 0.36

6 0

3 years ago

Question 2 (1 point)

vlada-n [284]

(3,0)

Step-by-step explanation:

Different - add

2x - y = 6

x + y. = 3

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÷3

x = 3

Substitute x = 3 into one of the equation:

x + y = 3

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Hope this helps!

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2 years ago

These parallelograms below are similar.

lesya692 [45]

Answer:

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Step-by-step explanation:

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3 years ago

5(y+1)=30 solve for y

Mkey [24]

Answer:y=5

Step-by-step explanation:

5(y+1)=30

Divide both sides by 5

5(y+1)/5=30/5

We get y+1=6

Subtract 1 from both sides

y+1-1=6-1

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4 years ago

Need Some Help With Explicit Functions

likoan [24]

Answer:

$f(1)=14000$

$f(n)=f(n-1) \cdot 0.9$

$10206$ is the next term after the third one given.

Step-by-step explanation:

This geometric since term divided by previous is the same number each time (the result that you get here is called the common ratio).

That is we have:

12600/14000=0.9

and

11340/12600=0.9

This means:

$\frac{\text{ term}}{\text{ previous term}}=0.9$

More formally:

$\frac{a_n}{a_{n-1}}=0.9$

To get it in the mentioned form you need to solve for $a_n$ . So we need to multiply both sides by $a_{n-1}$ giving you:

$a_n=0.9 a_{n-1}$

They used f( ) notation instead so this:

$f(n)=0.9f(n-1)$ .

In general when doing recursive you have to least give one term for the sequence (in some cases more than one).

f(1) means what is the first term. The first term is 14000, so $f(1)=14000$ .

The next term can be found by multiply your common ratio to the term before.

$11340 \cdot 0.9=10206$ is the next term.

8 0

3 years ago