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3 years ago

6

If the sum of a number and nine is doubled, the result is four less than the number. Find the number

1 answer:

Crazy boy [7]3 years ago

8 0

Answer:

- 22

Step-by-step explanation:

let the number be n then 2(n + 9) is the sum of the number and nine doubled, thus

2(n + 9) = n - 4 ← 4 less than the number

Distribute parenthesis

2n + 18 = n - 4 ( subtract n from both sides )

n + 18 = - 4 ( subtract 18 from both sides )

n = - 22

The number is - 22

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I forgot what the spread of a dot plot is?

maw [93]

Answer:

The spread is the range of the data. And, the shape describes the type of graph.

Step-by-step explanation:

4 0

3 years ago

Common factors of 20,25,40

dimaraw [331]

The factors of 20 are:
1, 2, 4, 5, 10, 20

The factors of 25 are:
1, 5, 25

The factors of 40 are:
1, 2, 4, 5, 8, 10, 20, 40

The common factors are:
1, 5

The Greatest Common Factor:
GCF = 5

7 0

2 years ago

4 divided by the sum of x and 2 equals the quotient of 3 and the difference of x and 2.

Triss [41]

Answer:

$x=14$

Step-by-step explanation:

$4$ divided by the sum of $x$ and $2$ , in math lingo, is $4/(x+2)$ . The quotient of $3$ and the difference of $x$ and $2$ , in math lingo, is $3/(x-2)$ .

We have that these two quantities are equal, so $4/(x+2)=3/(x-2)$ .

We can multiply both sides of the equation by $(x+2)(x-2)$ to get $4(x-2)=3(x+2)$ .

We can distribute both sides of the equation to get $4x-8=3x+6$ .

We can subtract $3x$ from both sides of the equation to get $x-8=6$ .

We can then add $8$ to both sides of the equation to get $x=14$ .

So, the answer is $\boxed{x=14}$ and we're done!

7 0

2 years ago

Find the volume using the formula V= πr2h

Dimas [21]

Answer: $V=254.46\ in^3$

Step-by-step explanation:

The formula for calculate the volume of a cylinder is the one given in the exercise:

$V=\pi r^2h$

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

You need to observe the figure given in the exercise. You can notice that the radius and the height of that cylinder are the following:

$r=3\ in\\\\h=9\ in$

Then, knowing those values, you can substitute them into the formula:

$V=\pi (3\ in)^2(9\ in)$

Finally you must evaluate in order to find the volume of the cylinder. You get the following result:

$V=\pi (9\ in^2)(9\ in)\\\\V=81\pi\ in^3\\\\V=254.46\ in^3$

7 0

3 years ago

IS 1/3 GREATER THAN 7/10

Ber [7]

No, 1/3 = 0.333, whereas 7/10 = 0.7

5 0

3 years ago

Read 2 more answers