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Svetlanka [38]
2 years ago
8

3x+y=10

Mathematics
1 answer:
jasenka [17]2 years ago
3 0
The only answer is (2,4)
You might be interested in
HELP?
poizon [28]
My "work" is to enter the equations into a graphing calculator and let it show me the answers--just as your "work" is to copy the question to Brainly.

The solutions are
  (x, y) = (-0.5, 7.5)
  (x, y) = (3, 25)

_____
When you equate the expressions for y, you get the quadratic
  2x² -5x -3 = 0
  (2x +1)(x -3) = 0
  x = -1/2 or 3
  y = 5(x +2) = 15/2 or 25

4 0
3 years ago
A property sells for $140,000 two years after it was purchased. If the annual appreciation rate is 6%, how much did the original
kykrilka [37]

Answer:

$123,200

Step-by-step explanation:

0.06 x 2 = 0.12

140,000 x 0.12 = 16,800

140,000 - 16,800 = 123,200

3 0
3 years ago
The area of the trapezium is 63cm and the top is 6cm and the bottom is 12cm what’s the height
steposvetlana [31]

Answer:

height = 7 cm

Step-by-step explanation:

The area (A) of a trapezium is calculated using the formula

A = \frac{1}{2} h(a + b)

where h is the height and a, b the parallel bases

here a = 6, b = 12 and A = 63, hence

\frac{1}{2} × h × (6 + 12) = 63

\frac{1}{2} h × 18 = 63

9h = 63 ( divide both sides by 9 )

h = 7

7 0
3 years ago
I will mark brainliest!! i need help with 3 and 4 ​
Bad White [126]
The answer is 30 and 26
4 0
3 years ago
In an old story, a man puts 2 grains of rice on the first space of a chess board. He puts 4 grains on the second space, 8 grains
denis23 [38]
We know that
a1----------> <span>grains of rice in the first square
a1=2
n------------> space ubication
the expressions  is
 an=a1</span>^n----------> an=2<span>^n

for the </span><span>the tenth space  n=10
</span>an=2^10---------> an=1024 grains of rice

the answer is
1024 grains of rice

5 0
3 years ago
Read 2 more answers
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