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VLD [36.1K]
2 years ago
14

Simplify the expression: -3(6 - 1.5n)=

Mathematics
2 answers:
stealth61 [152]2 years ago
6 0

Answer:

-18 + 4.5n

Step-by-step explanation:

-3(6 - 1.5n) = -3(6) -3(-1.5n)                  Distributive

                  = -18 + 4.5n                       Multiplication. Remember (-) (-) = +

                   

Tatiana [17]2 years ago
3 0

Answer:

Step-by-step explanation:

Use distributive property: a*(b +c) =a*b + a*c

-3( 6 - 1.5n) = (-3)*6 - (-3)*1.5n

                  = -18 + 4.5n

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Temka [501]

Answer:

18

Step-by-step explanation:

30%=.3

60*.3=18

30% of 60 =18

5 0
3 years ago
Which of the data sets below has a mean of 32? Select all that apply.
Akimi4 [234]

Answer:

B is the correct answer

Step-by-step explanation: When you add 18+54+24=96 divide 96 by 3 and its 32!

5 0
2 years ago
Simplify completely x^2+4x-45 / x^2+10x+9
S_A_V [24]

Answer: x - 5/x + 1

Step-by-step explanation:

This algebraic fraction

The task to be performed here is factorisation and simplification. Now going by the question,

x² + 4x - 45/x² + 10x + 9, the factorisation of

x² + 4x - 45 = x² + 9x - 5x - 45

= x(x + 9 ) - 5(x + 9 )

= ( x + 9 )(x - 5 ), don't forget this is the algebraic fraction's Numerator

The second part

x² + 10x + 9 = x² + x + 9x + 9

= x(x + 1) + 9( x + 1 )

= ( x + 9 )( x + 1 ), this is the algebraic denominator.

Now place the second expression which is the denominator under the first expression which is the numerator.

( x + 9 )( x - 5 )/( x + 9 )( x + 1 ).

You can see that, ( x + 9 )/( x + 9 ) divide each other , therefore therr then cancelled and left with

x - 5/x + 1

4 0
3 years ago
What is the distance between (–9,-6) and (-2,-2)?
Rufina [12.5K]

Answer:

8.0623

Explanation:

Distance between two points =  √ ( − 2  −  −  9 )^ 2 + ( − 2  −  −  6)^ 2

=  √ 7 ^2+ 4 ^2

= √ 49 +  16

=√ 65  = 8.0623

Distance between points (-9, -6) and (-2, -2) is 8.0623

3 0
3 years ago
Read 2 more answers
What is obtained by squaring the standard deviation?
anastassius [24]
<h2>Answer:</h2>

Variance

<h2>Step-by-step explanation:</h2>

The standard deviation is related to the variance. The standard deviation measures the variation or dispersion of a set of data and is represented by the Greek letter sigma \sigma, while the variance measures how far a set of  numbers are spread out from their average value. The variance is obtained by squaring the standard deviation, so the variance can be found as \sigma^{2}

3 0
3 years ago
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