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1 year ago

-1-2•[(-1)+5)} I am so lost on these math problems

Mathematics

2 answers:

nikitadnepr [17]1 year ago

5 0

Answer:

-9

Step-by-step explanation:

Use the order of operations. Do these operations in this order:

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Note: when either multiplication and division, or addition and subtraction are there, go left to right.

Equation: -1 - 2 · {(-1) + 5}

Solve:

-1 - 2 · {(-1) + 5}
-1 - 2 · {4}
-1 - 8
-9

*Challenge*

Using the same method, see if you can solve this equation:

6 ÷ 2(1+2)

-Chetan K

Pepsi [2]1 year ago

3 0

The answer is -9 because me said so

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A cylindrial hole is cut through the cylinder below.

Vika [28.1K]

Answer:

V=1884 Cubic mm

Step-by-step explanation:

We know that the volume of the Sphere is given by the formula

$V= \pi r^2h$

Where r is the radius and h is the height of the cylinder

We are asked to determine the radius of the hollow cylinder , which will be the difference of the solid cylinder and the cylinder being carved out.

$V=V_1-V_2$

$V=\pi r_1^2 \times h-\pi r_2^2 \times h$

$V=\pi \times h \times (r_1^2-r_2^2)$

Where

$V_1$ is the the volume of solid cylinder with radius $r_1$ and height h

$V_2$ is the volume of the cylinder being carved out with radius $r_2$ and height h

where

$r_1 = 7$ mm ( Half of the bigger diameter )

$r_2 = 5$ mm ( Half of the inner diameter )

$h=25$ mm

Putting these values in the formula for V we get

$V=\pi \times 25\times (7^2-5^2)$

$V=3.14 \times 25 \times(49-25)$

$V=3.14 \times 25 \times 24$

$V= 1884$

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2 years ago

The students who went to summer camp voted for there favorite activities how many more students voted Viking than for fishing 21

Trava [24]

Simply subtract 21 from 9.

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3 years ago

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Kaylis [27]

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3 years ago

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2 years ago

1-7x - 7=15 please answer and show how you got answer please

zlopas [31]

Answer:

x=-3

Step-by-step explanation:

1-7x-7=15

We move all terms to the left:

1-7x-7-(15)=0

We add all the numbers together, and all the variables

-7x-21=0

We move all terms containing x to the left, all other terms to the right

-7x=21

x=21/-7

x=-3

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3 years ago