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noname [10]
3 years ago
6

Please help me. I need how to do the problem too

Mathematics
1 answer:
MatroZZZ [7]3 years ago
5 0

Answer: Choice A.  (8, 4)

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

Explanation:

Because x = 2y, we can replace every copy of x with 2y

Let's do so in the second equation

3x - 4y = 8

3(x) - 4y = 8

3(2y) - 4y = 8 .... x replaced with 2y; now let's isolate y

6y - 4y = 8

2y = 8

y = 8/2 ..... divide both sides by 2

y = 4

Use this y value to find x

x = 2y

x = 2*4

x = 8

So we have x = 8 and y = 4 pair together to get the answer (x,y) = (8, 4) which is choice A.

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UNO [17]

Answer:

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2 years ago
A car travels 182 kilometers in 4 hours with the constant speed. how much time will it take traveling 42 kilometers
Schach [20]

Answer:

55.38 min

Step-by-step explanation:

A car travels,

182 km ⇒ 4 hours

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Lets make a equation.

Let the unknown time be x

182 km ⇒ 4 hours

42 km ⇒ x

To make easy let's km in to meters and hours in to minutes

182000 m ⇒ 240 min

42000m ⇒ x

Now use cross multiplication.

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6 0
2 years ago
Answer the questions attached about the given sequence: -33, -27, -21, -15, ...
Arte-miy333 [17]

Answer:

see below

Step-by-step explanation:

-33, -27, -21, -15,....

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-27+6 = -21

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The common difference is +6

explicit formula

an=a1+(n-1)d  where n is the term number and d is the common difference

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an = -33 +6n -6

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recursive formula

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10th term

n =10

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sum formula

see image

The sum will diverge since we are adding infinite numbers

7 0
3 years ago
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