What is the discriminant of the quadratic equation 0 = –x^2 + 4x – 2?–4
8
12
24
Answers
from this equation : a: the coefficient of x^2 & b: the coefficient of x & c: the last term so a=-1 ; b=4 ; c=-2; discriminant = b^2 -4*a*c = (4)^2 -4(-1)(-2) = 8
A charity fair raised $6,000 by selling 500 lottery tickets. There were two types of lottery tickets: A tickets cost $10 each, and B tickets cost $60 each. How many tickets of each type were sold?
Answers
Let a be the tickets that cost 10 each and b the tickets that cost 60 each. So therefore, a + b = 500 and 10a + 60b = 6000. By substituting the given numbers, a will be equals to 480. So the tickets sold are: 480 tickets for 10 each and 20 tickets for 60 each. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer:
on plato E. 480,20
Step-by-step explanation:
Find sin(α+β) if cosα=35 , sinβ=−45 , α is in quadrant I and β is in quadrant III
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Sin is about 4,.002 ........
Find the degree of the polynomial. 2p2q – 3pq + q2
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The correct answer is 3
What is the sum of 1,015 and 119A.896B.1,134C.1,224D.1,314
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So we want to know what the sum of 1015 + 119 is. The easiest way is to separate the two numbers into, ones, thens, hundreths and thousadns: 1015 = 1000 + 0 + 10 + 5 and 119 = 0 + 100 + 10 + 9. And now we add ones with ones, tens with tens, hundreths with hundreths and thousands with thousands: 1000 + 0 + 0 + 100 + 10 + 10 + 5 + 9=1000 + 100 + 20 + 14 = 1134 and the correct answer is B.
Divide 85 into the ratio of 2:3:5
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The actual amount that needs to be divided = 85 The ratio in which the amount needs to be divided = 2:3:5 Let us assume the common ratio to be = x Then 2x + 3x + 5x = 85 10x = 85 x = 85/10 = 8.5 Then The ratio in which the number 85 will be divided = 2 * 8.5:3 * 8.5:5 * 8.5 = 17:25.5:42.5 So from the above deduction we can see that the number 85 can be divided in the ratio 17:25.5:42.5