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2 years ago

Heres another 56 points for free. Good Luck :)

Mathematics

2 answers:

murzikaleks [220]2 years ago

7 0

Answer:

Thank you

Step-by-step explanation:

Gwar [14]2 years ago

3 0

Answer:

Thx

Step-by-step explanation:

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Maria has added 2 liters of pure alcohol to 8 liters of a 48% alcohol solution. What is the alcohol concentration of the resulti

ss7ja [257]

Answer:

The alcohol concentration of the resulting solution is 58.4%

Step-by-step explanation:

- At first we must to find the quantity of pure alcohol in the 8 liters

∵ The alcohol concentration is 48% in 8 liters

∴ The quantity of pure alcoholic = $\frac{48}{100}*8=3.84$ liters

- She added 2 liters pure alcohol to the solution that means the solution

increased by 2 liters and alcohol quantity increased by 2 liters

∵ She added 2 liters pure alcohol

∴ The quantity of pure alcohol = 2 + 3.84 = 5.84 liters

∴ The resulting solution = 2 + 8 = 10 liters

- Now we need to find the concentration of alcohol in the resulting

solution

∵ The quantity of pure alcohol = 5.84 liters

∵ The resulting solution = 10 liters

∴ The concentrate of alcohol = $\frac{5.84}{10}*100$ % = 58.4%

The alcohol concentration of the resulting solution is 58.4%

5 0

3 years ago

Read 2 more answers

Determine the corresponding general form of each of the following vertex form

SSSSS [86.1K]

Answer:

Step-by-step explanation:

(a + b)² =a² + 2ab + b²

(a -b)² = a² - 2ab + b²

1) y = (x -1)²

y= x² - 2*x*1 + 1

y = x² - 2x + 1

Ans: C

2)y = (x +4)² + 5

y = x² +2*x*4 + 4² + 5

= x² + 8x + 16 + 5

y = x² + 8x + 21

3) y = -(x + 9)²- 10

y = - [x² + 18x + 81] - 10

= -x² - 18x - 81 - 10

y =-x² - 18x - 91

4) y = 3(x + 2)² - 18

y =3 [x² + 4x + 4] - 18

y = 3x² + 12x + 12 - 18

y =3x² + 12x - 6

5) y = -2(x + 1)² - 16

= -2[x² + 2x + 1] -16

= -2x² - 4x - 2 - 16

y = -2x² - 4x - 18

6) y = 5(x + 5)²

=5[x²+ 10x + 25]

y = 5x² +50x + 125

7)y = (1/2)(x + 8)² - 8

y = (1/2) (x² + 16x + 64) - 8

$y = \dfrac{1}{2}*x^{2}+ \dfrac{1}{2}*16x + \dfrac{1}{2}*64 -8\\\\\\y =\dfrac{1}{2}x^{2}+8x +32 - 8\\\\\\y=\dfrac{1}{2}x^{2} +8x + 24$

8) y = (x + 3/2)² + 3/4

$y = x^{2} +2*x*\dfrac{3}{2}+\dfrac{9}{4}+\dfrac{3}{4}\\\\y=x^{2}+3x+\dfrac{12}{4}\\\\\\y=x^{2}+3x + 3$

9) y = 2[x² + 16x + 64] - 5x

y = 2x² + 32x + 64 - 5x

y =2x² + 27x + 6

4 0

2 years ago

Is r=3 a solution to the inequality r+4>7

crimeas [40]

No, r=3 can’t be a solution to this inequality. If we plug it in we get: 3+4>7 or 7>7 which is false. r should be more than 3.

5 0

3 years ago

What is the measure of each exterior angle of a hexahectagon (600 sides)?

kobusy [5.1K]

Answer:

0.6°

Step-by-step explanation:

The sum of exterior angles in a polygon is always equal to 360 degrees. For all equiangular polygons, the measure of one exterior angle is equal to 360 divided by the number of sides in the polygon.

360/600=0.6

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2 years ago

I NEED HELP ASAP Alicia is writing the program for a video game. For one part of the game she uses the rule (x,y)→(x-5,y+2) to m

inn [45]

Answer:

A. (-11,2)

B. (-2,-2)

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3 years ago