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aleksandr82 [10.1K]
3 years ago
12

How do i solve this 3x + y = 36 5x + y = 56

Mathematics
1 answer:
iren2701 [21]3 years ago
4 0

Answer:

x=10, y=6

Step-by-step explanation:

the send equation minus the first.

(5x+y)-(3x+y)=56-36

2x=20--->x=10

then put x=10 to the first equation, 3*10+y=36,  get y=6

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Determine the number of terms, n, given the geometric series 1 3 9 27 ... and sn=3280.
lina2011 [118]

The number of terms, 'n' is 8

<h3 /><h3>How to determine the number of terms</h3>

Let's determine the common ratio;

common ratio, r = 3/1 = 3

The formula for sum of geometric series with 'r' greater than 1 is given as;  Sn = a( r^n - 1) / (r - 1)

n is unknown

Sn = 3280

Substitute the value

3280 = 1 ( 3^n - 1) / 3- 1

3280 = 3^n -1 /2

Cross multiply

3280 × 2 = 3^n - 1

6560 + 1 = 3^n

6561 = 3^n

This could be represented as;

3^8 = 3^n

like coefficient cancels out

n = 8

Thus, the number of terms, 'n' is 8

Learn more about geometric series here:

brainly.com/question/24643676

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5 0
1 year ago
What fractional part of a pound is an ounce
Andre45 [30]

<span>That depends on what you mean by "pound" and "ounce."

There are 16 English ounces in an English pound. There are 12 troy ounces in a troy pound.</span>

<span>
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6 0
3 years ago
A washer and a dryer cost $928 combined. The washer costs $78 more than the dryer. What is the cost of the dryer?
SCORPION-xisa [38]

Answer:

Step-by-step explanation:

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4 0
3 years ago
Im really stook does any one know 6÷3/5
IRISSAK [1]
Ok so if the <span>6÷3 does not have a bracket, then the answer would be:

</span><span>6÷3/5 = 6 * 5/3 = 2 * 5 = 10

Hope this helps!</span>
3 0
3 years ago
Help me with 11 13 10 12 and 14 please
Kazeer [188]
10. d = 20
11. w = 22
12. z = 8
13. idk
14. p = - 8
 send me a message or something if this helps ; )
4 0
3 years ago
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