2 years ago

Help please in Algebra

Mathematics

2 answers:

photoshop1234 [79]2 years ago

8 0

I believe the answer is D

andreev551 [17]2 years ago

3 0

The answer is D. I say this because A, C, and B are not correct. so the answer would be D

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What is area if the perimetre is 26

Masteriza [31]

Answer:

42.25 units²

Step-by-step explanation:

The perimeter of a square is P = 4s.

26 = 4s

26/4 = s

6.5 = s

The side length of the square is 6.5 units.

The area of a square is A = s²

6.5²

= 42.25

The area of the square is 42.25 units².

5 0

3 years ago

Precalc.

viktelen [127]

Domain: x>0.

$(\log_2x)^2+7\log_2x+12=0$

Substitute $t=\log_2x\in\mathbb{R}$ . We have:

$t^2+7t+12=0\\\\a=1\qquad b=7\qquad c=12\\\\\\\Delta=b^2-4ac=7^2-4\cdot1\cdot12=49-48=1\\\\\sqrt{\Delta}=\sqrt{1}=1\\\\\\
t_1=\dfrac{-b-\sqrt{\Delta}}{2a}=\dfrac{-7-1}{2}=\dfrac{-8}{2}=-4\\\\\\
t_2=\dfrac{-b+\sqrt{\Delta}}{2a}=\dfrac{-7+1}{2}=\dfrac{-6}{2}=-3$

For t₁ there will be:

$\log_2x=t_1\\\\\log_2x=-4\\\\2^{-4}=x\\\\x=\dfrac{1}{2^4}\\\\\\x=\dfrac{1}{16}=0,0625\\\\\\\boxed{x\approx0,063}$

and for t₂:

$\log_2x=t_2\\\\\log_2x=-3\\\\2^{-3}=x\\\\x=\dfrac{1}{2^3}\\\\\\x=\dfrac{1}{8}\\\\\\\boxed{x=0,125}$

Answer d)

6 0

3 years ago

An employee at a pet shop randomly selects two fishes from a tank where there are 5 guppies, 4 platyfishes, and 3 rasboras. What

siniylev [52]

Answer:

0.6 is the probability

8 0

3 years ago

Read 2 more answers

What is the square root of 112a^2?

marshall27 [118]

That’s ur answer, your welcome