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AnnyKZ [126]
2 years ago
11

12x-5y= -20 y=x+4 x= y=

Mathematics
1 answer:
Lady bird [3.3K]2 years ago
8 0
The answer to the problem is:

x = -1.6
y = 4
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Can someone plz tell me if I'm correct or not thx
Illusion [34]
The answer is correct
7 0
3 years ago
At a department store, a coat that normally sells for $50 is on sale for $35. What is the percent decrease in the cost?
velikii [3]

Answer:

50÷35=15%

Step-by-step explanation:

7 0
3 years ago
Help me solve this please
damaskus [11]

1) A quadratic will have no real roots when its discriminant is negative


0 = ax^2 + bx + c = x^2 + 2k x + (4k-3)


d = b^2 - 4ac =  (2k)^2 - 4(1)(4k-3) = 4k^2 - 16k + 12 < 0


Dividing by 4,


k^2 - 4 k + 3 < 0 \quad\checkmark


We have a positive coefficient on k^2 so this parabola is a CUP (concave up positive) so has a minimum at the vertex. If the vertex y value is less than zero, the inequality will be true in the range between the zeros.


(k-3)(k-1)


That's true for


1 < k < 3


2) We look for the meet of the line and the parabola:


2x + k + 2 = 2x^2 + (k+2)x + 8


0 = 2x^2 + kx + (6-k)


For two intersections we need a positive discriminant:


k^2 - 4(6-k)(2) > 0


k^2 + 8k - 48 > 0


(k+12)(k-4) > 0


That's means two negative or two positive, so


k < 12 or k > 4


6 0
3 years ago
Y = 3 ( x - 2 )^2 + 5 in standard form
Vlad [161]

Answer:

y=3x^2-12x+17

Step-by-step explanation:

That's what i got

8 0
2 years ago
Ms. Smith has $8118 in her bank account on April 1st. She saves $710 in April. Then she must pay $1211 in taxes in May. Ms. Smit
8_murik_8 [283]

Answer: $308

Step-by-step explanation:

Based on the information given in the question, the account balance of Ms. Smith at the end of June will be:

= $8118 + $710 - $1211 + $809

= $8426

Therefore, the difference in her account balance than it was on April 1st will be:

= $8426 - $8118

= $308

4 0
2 years ago
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