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Damm [24]
3 years ago
10

What is the answer and how to work o

Mathematics
2 answers:
Vlad1618 [11]3 years ago
7 0

The answer is 7.15 which is also equivalent to 7 15/20

igor_vitrenko [27]3 years ago
3 0
The answer to the question 7 3/20

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For Exercises 6–9, determine the number of real solutions for each quadratic equation without solving.
valentina_108 [34]

Answer:

1) one real solution

2) no real solution

3) two real solutions

4) no real solution

Step-by-step explanation:

We have to determine the number of real solutions for each quadratic equation without solving.

ax^2 + bx +c=0\\D = b^2-4ac\\\text{If D is positive there are two real solutions}\\\text{Pif D is zero then there is one real solution}\\\text{if D is negative then there are no real solution.}

1)

p^2 + 7p + 33 = 8 - 3p\\p^2+10p+25=0\\D = 10^2 - 4(1)(25) = 0

Thus, the quadratic equation has one real solution.

2)

7x^2 + 2x + 5 = 0\\D = 2^2 - 4(7)(5) < 0

Thus, the quadratic equation has no real solution.

3)

2y^2 + 10y = y^2 + 4y - 3\\y^2+6y+3=0\\D = 6^2 - 4(1)(3) > 0

Thus, the quadratic equation has two real solutions.

4)

4z^2 + 9 = -4z\\4z^2 + 4z + 9 = 0\\D =4^2 - 4(4)(9) < 0

Thus, the quadratic equation has no real solution.

3 0
3 years ago
In a recent student government election, the ratio of students who voted for the winner to all the students who voted was 0.64.
Masja [62]

Answer:

80

Step-by-step explanation:

The total was 125

0.64 of them voted for the winner.

The number who voted for the winner = ratio * total

Votes for the winner = 0.64 * 125

Votes for the winner = 80

3 0
3 years ago
What expression is equivalent to: 3 (4x+10-2+3)
Andrew [12]

Answer:

12x + 30 - 6 + 9

Step-by-step explanation:

5 0
3 years ago
What is the solution to this system of equations?
kherson [118]

Answer:

A.

Step-by-step explanation:

When you substitute the coordinates to its corresponding variables, you can compare that answer choice A. is accurate compared to the other answer choices.

4 0
3 years ago
Read 2 more answers
What’s the difference between -9 -18 using absolute value
pentagon [3]

The answer is nine because eighteen subtract nine is nine

6 0
3 years ago
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