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3 years ago

Twice the difference of 9 and a number

Mathematics

1 answer:

Oksanka [162]3 years ago

6 0

Answer: 2(9-x)

Step-by-step explanation:

X equals the number

The difference means subtraction and it says the difference of 9 and a number which is 9-x

You multiply by the whole the whole thing because it says twice nine AND a number

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HELP NEEDED !!!!

Fofino [41]

The answer is Letter D - 84%

68% of the data is within +/- 1 SD from the mean = 59 to 7195% of the data is within +/- 2 SDs from the mean = 53 to 7799.7% of the data is within +/- 3 SDs from the mean = 47 to 83

The whole 68% (59 - 71) scored below 71. Since the data are evenly distributed, we'll get the 32% (100 - 68) outside the range of 68% and divide it by 2 and add the quotient to the original 68% so that we'll get the total data below 71.
100 - 68 = 32
32 / 2 = 16
16 + 68 = 84

7 0

3 years ago

A cylinder has a base diameter of 16 inches and a height of 18inches. What is the volume in cubic inches, of the nearest tenths

Stolb23 [73]

Answer:

3619.11 cubic inches

Step-by-step explanation:

volume of a cylinder is $V=\pi r^2h$

diameter is 16 in, so radius (r) is 8 in

plug in values: $V=\pi 8^2(18) = 3619.11$ cubic inches

8 0

3 years ago

For the inequality, decide whether the solution is represented by x <2.5 OR x >2.5. -25 > -5(x+2.5)

omeli [17]

To solve the inequality -25 > -5(x + 2.5), first multiply -5 by the number and variable in the parentheses.

-25 > -5x - 12.5

Now add 12.5 to both sides of the equation.

-25 + 12.5 > -5x - 12.5 + 12.5

-12.5 > -5x

Now divide -12.5 by -5 to get the answer.

-12.5 ÷ -5 is 2.5

You would think the final answer is 2.5 > x, but that is not true because -5 is negative and when a negative number is divided to both sides of an inequality, the sign gets flipped.

So, the real answer is 2.5 < x, or x > 2.5.

3 0

3 years ago

Help me!!!

Masja [62]

Answer:

Depends, I do that sometimes out of love and just for fun however i let them know im doing it just to mess with them. If you feel like they dont like you or you think they are a fake friend just get rid of them because later on it will break you as a person rather than make you a better person. Id suggest surrounding yourself around better peopl/frienda

Step-by-step explanation:

i dont know lol just what came off the top of my head

3 0

3 years ago

Two numbers have these properties both numbers are greater than 6 their highst common factor is 6 there lowest common factor is

levacccp [35]

Answer:

The two numbers are 12 and 30

Step-by-step explanation:

Both numbers are greater than 6

Their HCF is 6 and their LCM is 60.

A possible guess of the two numbers will be 6 and 60, which were given in the question, because they satisfy this HCF and LCM values, but the question also tells us that both numbers are greater than 6.

Now, we will obtain the answer using what we have.

Since the HCF is 6, that means that both numbers that we seek are a multiple of 6.

Next, the LCM is 60. We can divide the LCM by the HCF, that is $\frac{60}{6}$ = 10

This tells us that the two numbers are within 6 and (6 × 10).

Next we write out the factors of the 10 that we got by dividing the LCM by the HCF.

Factors of 10 are: 1, 2, 5 and 10.

We multiply each of this by 6 (which is the HCF, recall that we had said that HCF means that the numbers are a multiple of 6), to get the numbers; <em>6, 12, 30 and 60</em>

Since 6 and 60 are already the given LCM and HCF, the two numbers that we seek are 12 and 30.

4 0

3 years ago