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3 years ago

HELP NEEDED

Mathematics

2 answers:

bezimeni [28]3 years ago

8 0

5. Answer: x=7

Step by step solution:
6x+2=44
6x=44-2
6x=42
x=7

6. Answer: 14

Step by step solution:
5x+1=71
5x=71-1
5x=70
x=14

7. x=22

Step by step solution:
3x+1=67
3x=67-1
3x=66
x=22

8. x=27

Step by step solution:
2x=54
x=27

liubo4ka [24]3 years ago

7 0

Step-by-step explanation:

2x+54=180

2x=180-54

2x=126

divide each side by two u will get x

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Step-by-step explanation:

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$\pi r^2 h = \pi r^2+\pi r h\\\pi r^2h-\pi rh=\pi r^2\\h(\pi r^2-\pi r)=\pi r^2\\h=\pi r^2/(\pi r^2-\pi r)$

we substitute the value of the radius $r=7cm$ , and we get:

$h=\pi (7cm)^2/(\pi (7cm)^2-\pi (7cm))\\h=153.938/(153.938-21.991)\\h=153.938/131.947\\h=1.1666cm$

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