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3 years ago

Evaluate the expression, -2.4+24+8

Mathematics

2 answers:

svet-max [94.6K]3 years ago

8 0

Answer:

29.6

Step-by-step explanation:

-2.4 + 24 + 8 = (24 + 8) - 2.4 = 32 - 2 - 0.4 = 30 - 0.4 = 29.6

cestrela7 [59]3 years ago

7 0

Answer:

148/5 is the answer to your problem

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A researcher collects data on the number of times race horses are raced during their careers. The veterinarian finds that the av

vesna_86 [32]

Answer:

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

Step-by-step explanation:

Explanation:-

The veterinarian finds that the average number of races a horse enters is 15.3

The mean of the sample x⁻ = 15.3

Given standard deviation of the sample 'S' = 6.8

Given sample size 'n' = 25

Degrees of freedom = n-1 =25-1 =24

The tabulated value 't' = 2.064 at two tailed test 0.95 level of significance

95% confidence for µ, the average number of times a horse races

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } , x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

$(15.3- 2.064 \frac{6.8}{\sqrt{25} } , 15.3 + 2.064\frac{6.8}{\sqrt{25} } )$

(15.3 - 2.80704 ,15.3 +2.80704)

(12.493 , 18.107)

Conclusion:-

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

3 0

3 years ago

Burning one gallon of gasoline releases 20 pounds of CO2 into the air. Harry's compact car can travel 25 miles on one gallon of

maks197457 [2]

It was given that

1 gal = 20 lbs of CO2
1 gal = 25 miles distance

Thus,

15000 miles/year ( 1 gal / 25 miles ) ( 20 lbs CO2 / 1 gal ) = 12000 CO2

If Harry drives 15,000 miles per year, his vehicle will add 12000 pounds of CO2 to the atmosphere.

7 0

3 years ago

Read 2 more answers

Time/Distance/Speed

NemiM [27]

Time = distance / speed
= 95/ 105 = 0.905 hours or about 54.3 minutes or 54 minutes 17 seconds

6 0

3 years ago

Together Charles, John, and Jerry received $50. Charles received $12, John received $24, and Jerry received $14. What per cent o

yuradex [85]

Answer:

12 percent

Step-by-step explanation:

24 by 100 0f 50

24 ×50=1200

1200÷100 is 12

8 0

3 years ago

Could you pls help with question 2

kolezko [41]

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

Decimal Form:

0.3

this is the first one I'm not to good with area

8 0

2 years ago