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2 years ago

24a²-30 at 9 Solve please

Mathematics

1 answer:

blsea [12.9K]2 years ago

6 0

Answer:

1914

Step-by-step explanation:

<u>Substitute "a" for 9</u> in the equation. Solve using the BEDMAS order (brackets, exponents, division, multiplication, addition, subtraction).

24a² - 30

= 24(9)²-30 The exponent only belongs to the 9. Square 9.

= 24(81) - 30 Multiply 24 and 81.

= 1944 - 30 Subtract 30 from 1944.

= 1914 Answer

24a²-30 at 9 is 1914.

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Vitek1552 [10]

Answer: σ: 2.76

Step-by-step explanation:

Count, N: 5

Sum, Σx: 125

Mean, μ: 25

Variance, σ2: 7.6

Steps

look at attached pic for formula

σ^2 = $\frac{Σ(xi - μ)^{2} }{N}$

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2 years ago

Sidney skated for 1 1/10 hours last month and 8 7/10 hours this month. How many

olganol [36]

Answer:

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Step-by-step explanation:

The computation of the number of hours does sidney skate in all is as follows:

= Last month + this month

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3 years ago

A rectangle hale card has a length of 3/10 and a width of 4/5 find the perimeter

postnew [5]

Answer:

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Step-by-step explanation:

To find the perimeter, add all sides together. Since it's a rectangle, the other sides are the same measurement as the ones given. Add 3/10, 3/10, 4/5, and 4/5 together. To do this, find a common denominator. The lowest common denominator is 10 so multiply the 4/5 by 2/2 to get the denominator to be 10. Now, add 3/10, 3/10, 8/10, and 8/10. It adds up to 22/10 but if you don't want an improper fraction, simplify it to 2 and 1/5.

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Step-by-step explanation:

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3 years ago