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Ymorist [56]
2 years ago
13

Pls help I'm stuck on these questions and i need to turn this in tomorrow ​

Mathematics
1 answer:
MArishka [77]2 years ago
6 0

Answer:

Step-by-step explanation:

11) 4x+2=5x-10 => 4x-5x=-10-2 => -x=-12 => x=12

12)25x=24x+4 => x=4

13)20x=21x-5 => -x=-5 => x=5

14)20x+10x=180 => 30x =180 =>x=6

To understand it better,you may check the picture down below.

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kevin built a deck in his backyard. The length of the deck was 5x+1 units and the width of the deck was 4x-1 units. Write and si
amm1812

Answer:

Perimeter =

2(length + width)  \\ 2(5x + 1 + 4x - 1) \\ 2(5x + 4x + 1 - 1) \\ 2(9x ) \\ 9 \times 2 \\  = 18

7 0
3 years ago
Enter your answer, in simplest radical form.
Alexus [3.1K]

Answer: 30x\sqrt{2y}

Step-by-step explanation:

\sqrt{6x} x \sqrt{15xy} x \sqrt{20}

This can also be written as :

\sqrt{6x.15xy.20}

= \sqrt{1800x^{2}y}

which could be written as :

\sqrt{900x^{2}} x \sqrt{2y}

= 30x\sqrt{2y}

4 0
3 years ago
Find the distance between the two points.(-7,4/19) and (7,4/9)
Dafna1 [17]

Answer:

<h2>d=(14,0)</h2>

Step-by-step explanation:

<h2>√(7-(-7))^+(4/19-4/19)^</h2><h2>√(7+7)^+(0)^</h2><h2>√(14)^+0</h2><h2>= 14</h2>
7 0
3 years ago
Suppose that 200 students are randomly selected from a local college campus to investigate the use of cell phones in classrooms.
serious [3.7K]

Answer:

It would change to 0.04802

Step-by-step explanation:

from this question we have that n became 400

40% of 400

= 160

p* = 160/400

= 0.4

1 - p* =

= 1 - 0.4

= 0.6

at confidence level,

1 - 0.95

= 0.05

alpha/2 = 0.025

z= 1.96

<u>margin of error. E</u>

= 1.96 x √[(0.4 x 0.6)/400]

= 1.96 x 0.0245

= 0.04802

M.E = 0.04802

6 0
3 years ago
An official NHL hockey puck is shaped like a cylinder with a diameter of 3 inches and a volume of 7.1 cubic inches. What is the
Dima020 [189]

H=1in

You would need to use the equation V= pie times radius squared times height. Since it gives you the diameter, you would need to divide 3 by 2 to get 1.5. So now you would plug in 7.1=pie×1.5(squared)×h

Now solve the equation to get 1in.

And you can check this answer by using this same equation to plug in pi×1.5 (squared)×1 and you will get 7.1 as your volume.

8 0
3 years ago
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