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icang [17]
2 years ago
8

Determine which equation has exactly one real solution. PLS HELPP

Mathematics
1 answer:
sergey [27]2 years ago
4 0

Answer:

b)  4x^2-12x+9=0

Step-by-step explanation:

We can use the discriminant b^2-4ac to determine how many real solutions a quadratic equation in the form ax^2+bx+c=0 has.

  • discriminant > 0 ⇒ 2 real solutions
  • discriminant = 0 ⇒ 1 real solution
  • discriminant < 0 ⇒ no real solutions

5x^2+9x-4=0

b^2-4ac=9^2-4(5)(-4)=161 > 0\implies \textsf{2 solutions}

4x^2-12x+9=0

b^2-4ac=(-12)^2-4(4)(9)=0 \implies \textsf{1 solution}

-9x^2+6x+1=0

b^2-4ac=6^2-4(-9)(1)=72 > 0 \implies \textsf{2 solutions}

-2x^2-7=0

b^2-4ac=0^2-4(-2)(-7)=-56 < 0 \implies \textsf{no solutions}

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Find the length of each Arc. Do not round. Part 2. NO LINKS!! ​
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10)  95π/6 ft

12)  39π/4 ft

Step-by-step explanation:

10) 2π * 19 * 150/360 = 95π/6 ft

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5 0
2 years ago
PLEASE HELP (only if you know what you are doing )
KiRa [710]

Answer:

1. 3     2. 22     3. 0

Step-by-step explanation:

First Box: Jada only has <u>$15</u> dollars she can spend

If she chooses to buy 6 individual songs that would cost her $3.

because each individual song cost $0.50 so (6 times 0.5= 3)

Since Jada only has $15 we need to subtract 3 from 15 to find out how much money she has left. So, 15-3=12. Jada has $12 left

An album cost $4 dollars each so Jada can only buy 3 albums with $12 because 12 divided 4 is 3.

Answer to first box: 3

Second Box:  Jada only has <u>$15</u> dollars she can spend

If she chooses to buy 1 album that would cost her $4.

because each individual song cost $4 so (4 times 1= 4)

Since Jada only has $15 we need to subtract 4 from 15 to find out how much money she has left. So, 15-4=11. Jada has $11 left

An individual song cost $0.50 dollars each so Jada can only buy 22 individual songs with $11 because 11 divided by 0.5=22.

Answer to second box: 22

Third Box: Jada only has <u>$15</u> dollars she can spend

If she chooses to buy 30 individual songs that would cost her $15.

because each individual song cost $0.50 so (30 times 0.5= 15)

Since Jada only has $15 we need to subtract 15 from 15 to find out how much money she has left. So, 15-15=0. Jada has $0 left

An album cost $4 dollars each so Jada can only buy 0 albums with $0 because 0 divided 4 is 0.

Answer to third box: 0

4 0
3 years ago
Read 2 more answers
Somebody please help me with this question!​
marta [7]

Answers:

P(A) = 7/12

P(B) = 1/2

=====================================================

Explanation:

To see how I calculated P(A), check out this link to this very similar question

brainly.com/question/27669586

--------------------

Now to calculate P(B)

If a number is divisible by 2, then the number is a multiple of 2.

In other words, the number is even.

Counting through the values in the table, you should find that there are 18 sums that are even (2, 4, 6, 8, 10 and 12). Refer to the dice chart below.

Here's a further breakdown

  • 1 copy of "2"
  • 3 copies of "4"
  • 5 copies of "6"
  • 5 copies of "8"
  • 3 copies of "10"
  • 1 copy of 12

Side note: We have nice symmetry going on.

There are 1+3+5+5+3+1 = 18 values total that are even numbers. The other half are odd numbers of course.

P(B) = 18/36 = (1*18)/(2*18) = 1/2

3 0
2 years ago
Need help!!!!ASAP
raketka [301]
I hope this helps you

3 0
3 years ago
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