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svp [43]
3 years ago
13

Solve by elimination 4x+5y=15 6x-4y=11

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
7 0
{x,y}={5/21} hope this helped!
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Meridian: the (imaginary) line between the south and North Pole which divides the earth in half
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Step-by-step explanation:

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3 0
4 years ago
a) The quadratic 3x^2-12x-11 can be written in the form 3(x+a)^2+b. Find the values of a and b. b) Given that the solutions of t
LenKa [72]

Answer:

Step-by-step explanation:

a) 3x^2-12x-11=3*x^2-3*2*2*x+3*4-23=3*(x^2-2*2x+2^2)-23=3*(x-2)^2-23

so  a= -2 ,b= -23

b) x1=[12+V(12^2-4*3* -11)]/6=12/6+V(144+132)/6=2+2/6V69=2+1/3V69=

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5 0
3 years ago
If p = 4, q = -3 and r = -2 what is the value of pqr
BaLLatris [955]

pqr

(4) * (-3) * (-2)

-12 * (-2)

24

6 0
3 years ago
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a father is 5s years more than twice as old as his son. the difference in their ages is 25 years. How old is the father
swat32
In order to solve these sort of problems, we can set up 2 equations from the 2 statements.

f = 5  + 2s \\ f  -  s = 25
We can subsitute the value of f, our first equation, into the second equation and solve like this:
5 + 2s  -  s = 25 \\ 1s + 5 = 25 \\ 1s + 5 - 5 = 25 - 5 \\ s = 20
Then we put the the son's age, 20, back into one of our equations and solve for the other value.

f = 5 + 2(20) \\ f = 40 + 5 \\ f = 45
Thus, the father is 45 years old and the son is 20 years old.
5 0
3 years ago
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