Answer:
option A
-2x + 4y = 4
-3x + 6y = 6
Step-by-step explanation:
In option A, if the student multiply the first equation by 3 and the second equation by -2, then the equations become
-6x+12y = 12 and
6x-12y =-12
If she adds both equations, she will get 0 = 0
This means that the system has infinite number of solutions.
Hence, the student could have started with equations -2x + 4y = 4 and -3x + 6y = 6.
Answer:
32 ounces of fruits
Step-by-step explanation:
Given that :
Number of distinct fruits purcahed = 6
Number of ounces of each fruit = 5 1/3
The total ounces of fruits purchased :
(Number of distinct fruits purchased * Number of ounces of each fruit)
6 * 5 1/3 = 6 * 16/3
6 * 16/3 = (16 * 6) / 3 = 96 /3 = 32 ounces of fruits.
<span>a, để pt có nghiệm thì denta ≥ 0 <=> (3-m)^2 - 4( 3-2m) ≥ 0 <=> m^2 +2m-3 ≥ 0 ( ^ là mũ)
giải bpt mới tìm được đó ta đc : m ≤ -3 hoặc m ≥ 1
b, * Xét m-1=0 <=> m=1 => thay m=1 vào pt thì pt có 1 nghiệm là 1/8 (1)
* Xét m-1 ≠ 0 <=> m ≠ 1
=> pt có nghiệm khi denta' ≥ <=> (m+3)^2 - (m-1)(-m+2) ≥0 <=> 2m^2 +3m+11 ≥ 0 (*)
-> bpt (*) có denta < 0 nên nó luôn đúng với mọi m ≠1 -> denta của pt đã cho luôn > 0 với mọi m ≠ 1 (2)
từ (1) (2) => với mọi m pt luôn có nghiệm </span>
Answer:
<u>3</u><u>0</u><u> </u><u>caps</u><u> </u><u>can</u><u> </u><u>be</u><u> </u><u>bought</u>
Step-by-step explanation:
