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Alik [6]
3 years ago
5

Simplify a-{3a-[4a-(2a-4a)]}

Mathematics
1 answer:
Dvinal [7]3 years ago
5 0
Start from the inside and work your way out.
we would start with simplifying (2a-4a) first, giving us (-2a) instead of the previous.
(4a-(-2a)) would give us a positive 6a.
(3a-6a) would give us a (-3a)
a-(-3a) would leave us with a simplified 4a.
that's the answer, hope that helped!! xx
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The scores on a math test are normally distributed with a mean of 64 and a standard deviation of 8. Tara scored 52 on the test.
Dvinal [7]
A z-score<span> is the number of standard deviations from the mean a data point is.
</span>
Standard deviation explains by how much the members of a group differ from the mean value for the group.
Using the z-score formula:
                                           z = ( x  - μ ) ÷ σ
Where;
            x = score
            μ = Mean
            σ = Standard deviation 

Z- Score (Tara) = ( 52 - 64 ) ÷ 8
                         = - 12 ÷ 8
                         = - 1.5 

Z- Score (Jamal)  = ( 82 - 64 ) ÷ 8
                             = 18 ÷ 8
                             = 2.25 

Z- Score (Samuel) = ( 66 - 64 ) ÷ 8
                               = 2 ÷ 8
                               = 0.25
6 0
3 years ago
Find the length of an arc of 40° in a circle with an 8 inch radius.
gulaghasi [49]

Answer:

5.59 inch

Step-by-step explanation:

Arc Length = 2 * π * 8 * (40/360) = 16π/9 = 5.59

6 0
4 years ago
The pre–image, A, was dilated about the origin. It was then transformed in another way to get A'.
Elenna [48]

Answer:

reflection over the x-axis

Step-by-step explanation:

i hope this helps

6 0
3 years ago
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valina [46]

Answer:

Determine the number of tables by dividing 754 by 6. If there is a remainder, the answer will need to be rounded tenths or hundredths . There is a remainder, so 125.6 tables are needed.

Step-by-step explanation:

5 0
3 years ago
Factor the expression below. <br><br> x3 − 27
Gekata [30.6K]
Well, the formula is: (a-b)(a^2+ab+b^2)therefore the answer would be: (x-3)(x^2+3x+9)<span>hope this helps</span>
4 0
4 years ago
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