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Shalnov [3]
3 years ago
11

24a²-30 at 9 Solve please

Mathematics
1 answer:
blsea [12.9K]3 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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What is the value of 2x^-2y^-2 for x = 3 and y = 2? a) 1/18 b) 72 c) 2(-6)^-4 d) 1/648
sladkih [1.3K]
2x^-2y^-2 = 2/x^2y^2 = 2/(2)^2 x (3)2 = 2/4 x 9 = 2/36 = 1/18
8 0
3 years ago
Suppose that 20% of adults belong to health clubs, and 51% of these health club members go to the club at least twice a week. Wh
Westkost [7]

Answer:

10.2% of adults will belong to health clubs and will go to the club at least twice a week

Step-by-step explanation:

assuming that the event H=an adult belongs to a health  club  and the event T= he/she goes at least twice a week , then if both are independent of each other:

P(T∩H)= P(H)*P(T)  ( probability of the union of independent events → multiplication rule )

replacing values

P(T∩H)= P(H)*P(T) = 0.20 * 0.51 =0.102

then  10.2% of adults will belong to health clubs and will go to the club at least twice a week

5 0
3 years ago
Urgent!!! Will give thanks and branliest!
agasfer [191]
Okay so, togo flies 30 miles in 3/5 of an hour with the wind.togo flies 30 miles in 5/6 of an hour against the wind. his rate of speed with the wind was 30 / (3/5) = 30*5/3 = 150/3 = 50 mph.his rate of speed against the wind was 30 / (5/6) = 30*6/5 = 6*6 = 36 mph.3/5 of an hour times 50 mph = 30 miles.
5/6 of an hour times 36 mph = 30 miles.mph looks good.
going he was with the wind.
his rate of speed then was the airplane speed plus the wind speed.coming back he was against the wind.his rate of speed then was the airplane speed minus the wind speed.-----50 mph = A + W36 mph = A - W-----looks like A + W - (A - W) should equal 50 - 36.removing parentheses, equation becomesA + W - A + W = 14.
combining like terms, the equation becomes2*W = 14.dividing both sides by 2, equation becomesW = 7.if W = 7, then A can be found as follows:50 = A + 7A = 43.likewise,36 = A - 7A = 43.since the airplane speed is the same, it looks like the answer is good.solving in the original equations, we get3/5 * (43 + 7) = 303/5 * 50- = 3030 = 30good.-----5/6 * (43 - 7) = 305/6 * 36 = 3030 = 30good.
answer is W = 7 and A = 43.
8 0
3 years ago
We randomize a sample for all the following reasons EXCEPT:
kirza4 [7]

Answer:

C

Step-by-step explanation:

6 0
2 years ago
What are the answers to these. Please Help.
Ugo [173]

Answer:

the answer for number 4 is c

8 0
3 years ago
Read 2 more answers
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