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aalyn [17]
3 years ago
6

1. (3x + y = 5 (x-4y=32

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
8 0

Answer:

13x=52

x=14

y=-37

plz mark brainliest

Archy [21]3 years ago
5 0

Answer:

{x,y}={4,7}

Step-by-step explanation:

3x - y = 5

x+ 4y = 32

y + 3x = 5   ,      4y + x = 32  

x = -4y + 32

3•(-4y+32) - y = 5

- 13y = -91

13y = 91  

 y = 7

x = -4y+32

 y = 7

x = -4(7)+32 = 4

so the final solution is:

⇒x = -4(7)+32 = 4

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A jet ski costs $925 and depreciates by 15% each year. How much will
ivann1987 [24]
Initial cost of the jet ski = $925
Percentage of depreciation per year = 15%
Number of years after which the cost of the jetski has to be determined = 7
Then
Depreciated Value = Initial cost( 1 - percentage of depreciation) ^number of years
                              = 925( 1 - 15%)^7
                              = 925( 1 - 15/100)^7
                              = 925(1 - 0.15)^7
                              = 925(0.85)^7
                              = 925 *(0.85)^7
                              = 925 * 0.3206
                              = 296.53 dollars
So the depreciated cost of the jet ski after 7 years will be $296.53
6 0
3 years ago
Need ASAP i will give 10 points
kondor19780726 [428]

Answer:

B) 1

Step-by-step explanation:

There are 8 pairs of data in the table but only 7 points plotted in the graph,

hence there must be 1 point that is missing from the graph.

It turns out that the missing point that was not plotted is (10, 2.5)

5 0
3 years ago
The ratio of two numbers is 4:9. When 5 is subtracted from each of them the new ratio becomes 3:8. Find the numbers.​
natta225 [31]

Answer:

FIRST NUMBER IS 20

AND

SECOND NUMBER IS 45

Step-by-step explanation:

LET THE RATIO BE X

FIRST NUMBER = 4X

SECOND NUMBER = 9X

A/Q,

=}4X - 5 / 9X - 5 = 3 / 8

CRISS CROSS,

=}8 ( 4X - 5 ) = 9X - 5 ( 3 )

=}32X - 40 = 27X - 15

=}32X - 27X = - 15 + 40

=}5X = 25

=}X = 25 / 5

=}X = 5

THEREFORE,

FIRST NUMBER

=} 4X

=} 5 × 4

=} 20

SECOND NUMBER

=} 9X

=} 5 × 9

=} 45

8 0
3 years ago
3x-x+4=5x-8 . respuesta de esa ecuciojn
svetlana [45]

Answer:

x=4

Step-by-step explanation:

Combine like terms

Subtract  4  from both sides of the equation

Simplify  

Subtract  5  from both sides of the equation

Simplify  

Divide both sides of the equation by the same term  

Simplify

4 0
3 years ago
Read 2 more answers
Sam wanted to buy candy for all of his friends to share at lunch. One pound of chocolates cost $6.95, but Sim only needs 0.6 of
OLga [1]

Answer:

The answer to your question is cost of 0.6 pound of candy $4.17

Step-by-step explanation:

Data

1 pound of candy = $6.95

only 0.6 pounds

final cost = ?

Process

1.- Use proportions to find the cost of 0.6 pounds of candy

               1 pound of candy -------------- $6.95

               0.6 pound of candy ----------   x

2.- Use cross multiplication

                 x = (0.6 x 6.95) / 1

3.- Simplification and result

                 x = $ 4.17          

5 0
3 years ago
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