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Ivan
3 years ago
6

Please help, will mark brainliest, do not do for points or I will report, explanation please or no brainliest

Mathematics
2 answers:
Molodets [167]3 years ago
7 0

ANSWER:

(2y - 1)(2y + 1)

Using identity (a + b)(a - b) = a² - b².

(2y)² - (1)²

4y² - 1.

sladkih [1.3K]3 years ago
4 0

Answer:

to multiply-----

(2y-1)(2y+1)

2y(2y+1)-1(2y+1)

4y^2+2y-2y-1

=4y^2-1

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Algbra two, i need help asap please
AlladinOne [14]

Answer:

(a) The zeroes of f(x) are rational numbers

(b) The smallest integer value of a is 3

Step-by-step explanation:

In the quadratic function f(x) = ax² + bx + c, we can know the number and the types of its roots using the discriminant  Δ, where Δ = b² - 4ac

  • If Δ > 0, then the zeroes are two different real numbers
  • If Δ = 0, then the zeroes are the same real number
  • If Δ < 0, then the zeroes are imaginary numbers

Note: In the first case if Δ is a perfect square number then the zeroes are rational, if not then the zeroes are irrational

(a)

∵ The equation function is f(x) = ax² + 11x + 12

∵ a = 2

∴ a = 2, b = 11 and c = 12

→ Substitute them in the rule of Δ

∵ Δ = (11)² - 4(2)(12) = 121 - 96

∴ Δ = 25

∵ Δ > 0

∴ f(x) has two different real zeroes

∵ 25 is a perfect square number

→ That means the zeroes of the function are rational numbers

∴ The zeroes of f(x) are rational numbers

(b)

∵ f(x) ha imaginary zeroes

→ By using the third rule above

∴ Δ < 0

∵ a = a, b = 11 and c = 12

→ Substitute them in the rule of Δ

∴ (11)² - 4(a)(12) < 0

∴ 121 - 48a < 0

→ Add 48a to both sides

∵ 121 - 48a + 48a < 0 + 48a

∴ 121 < 48a

→ Divide both sides by 48

∴ 2.52083 < a

∴ a > 2.52083

∵ The smallest integer greater than 2.52083 is 3

∴ The smallest integer value of a is 3

5 0
3 years ago
Which situation has the lowest cost per can?
GrogVix [38]

Answer:

10 cans for $5.80

Step-by-step explanation:

6 0
2 years ago
Ben strikes out 90 times in 340 at bat. What percent of the time does Ben strike out
nikklg [1K]

Answer:

percentage=26.47\%

Step-by-step explanation:

Ben\ strikes\ in\ 340\ efforts=90\\\\So\ fraction\ he\ can\ strike\ 1\ effort=\frac{number\ of\ times\ he\ strikes}{total\ efforts}\\\\So\ fraction\ he\ can\ strike\ in\ 1\ effort=\frac{90}{340}\\\\So\ fraction\ he\ can\ strike\ in\ 1\ effort=\frac{9}{34}\\\\He\ can\ strike\ in\ 100\ efforts=\frac{9}{34}\times 100\\\\percentage=26.47\%

3 0
3 years ago
QUESTION AND ANSWER IN IMAGE!
eduard
That would be Graph C

The  solution is where the 2 graphs intersect  At A and B.  
x + y + 2 = 0  transforms to  y = -x - 2 which has slope -1 and  y-intercept of -2
as in Graph C.
8 0
3 years ago
Solve the inequality. Graph the solution.<br> 7z&lt; -28
Zepler [3.9K]

Answer: The answer is -9

Step-by-step explanation:

7z<-28= -9

Because we take the -28 and add 19 because that's the common denominator and we come up with -9

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2 years ago
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