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Kay [80]
3 years ago
13

2.5y+3x=27 5x-2.5y=5

Mathematics
2 answers:
Elden [556K]3 years ago
8 0
X would equal 4 & y would equal 6
zhenek [66]3 years ago
3 0

Answer:

x=4

y=6

Step-by-step explanation:

2.5y + 3x = 27 \\  + (5x - 2.5y = 5) \\  \\ 8x = 32 \\ x = 4 \\  \\ 2.5y + 3x = 27 \\ 2.5y + 3(4) = 27 \\ 2.5y + 12 = 27 \\ 2.5y = 15 \\ y = 6

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Lia has a dog and a cat. Together, the pets weigh 24 pounds. The dog weighs 2 times as much as the cat.
telo118 [61]

Answer:

The dog weighs 16 pounds, while the cat weighs 8 pounds

Step-by-step explanation:

Let's call the weight of the dog d, and the weight of the cat c.

d+c=24

d=2c

Substitute the second equation into the first:

(2c)+c=24

3c=24

c=8

d=24-8=16

Hope this helps!

3 0
3 years ago
Six times a number increased by 20 is four less than eight times the number. Find the number
DaniilM [7]
Greetings!

"<span>Six times a number increased by 20 is four less than eight times the number. Find the number."...

This would be, as an equation:
</span>6x+20=8x-4

Solve:
Add 4 and -6x to both sides.
(6x+20)+4+(-6x)=(8x-4)+4+(-6x)
Simplify.
24=2x
Divide both sides by 2.
(24)/2=(2x)/2
Simplify.
12=x
x=12
<span>
x=12

Hope this helps.
-Benjamin

</span>
4 0
3 years ago
A jar contains nickles and pennies. There are 56 coins in the jar in all. The total value the total value of the coins are $1.52
timofeeve [1]
<span>Let the number of nickles be x Let the number of pennies be y Value Value Type Number of of of of EACH ALL coin coins coin coins ------------------------------------------- nickles x $0.05 $0.05x pennies y $0.01 $0.01y ------------------------------------------- TOTALS 56 ----- $1.52 The first equation comes from the second column.</span>
6 0
3 years ago
Read 2 more answers
Help me on this please
Rina8888 [55]

Answer:

x = 3.5

Step-by-step explanation:

Triangle to the right:

4^2 + x^2 = 8^2

16 + x^2 = 64

y^2 = 48

Triangle to the left:

x^2 + 6^2 = 48

x^2 + 36 = 48

x^2 = 12

x = sqrt(12)

x = 3.5

4 0
2 years ago
9-3(x-6) = 2(x-4)-10
vazorg [7]

Answer: x = 9

Step-by-step explanation: your welcome

8 0
3 years ago
Read 2 more answers
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