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3 years ago

Help me pls! I don't understand!! !

Mathematics

1 answer:

forsale [732]3 years ago

8 0

I think it's the last one, i'm not sure though

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Viefleur [7K]

Answer:

C: is correct answer

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 $3 \times {10}^{5}$ 

7 0

3 years ago

Read 2 more answers

Item 32 On three 150-point geography tests, you earned grades of 88%, 94%, and 90%. The final test is worth 250 points. What per

stira [4]

97.2% on the final.
Find the total amount of points needed to get a 93%. 150+150+150+250 = 700 total points. 700*.93 = 651 total points needed to get 93%. find the points received from the other quizzes and subtract the sum from 651 to find how many points need to be scored on the final.
150*.88=132 (test 1)
150*.94=141 (test 2)
150*.90=135 (test 3)
132+141+135= 408

651-408 = 243 points to score on the final exam.
243/250 =.972 or 97.2%

3 0

3 years ago

Help first one gets brainllest

kherson [118]

Answer:

x = 1 $\frac{1}{4}$

Step-by-step explanation:

Expressing the diagram as an equation , that is

6x - 3 = 4 $\frac{1}{2}$ = $\frac{9}{2}$ ( multiply through by 2 to clear the fraction )

12x - 6 = 9 ( add 6 to both sides )

12x = 15 ( divide both sides by 12 )

x = $\frac{15}{12}$ = $\frac{5}{4}$ = 1 $\frac{1}{4}$

4 0

3 years ago

Kevin has $1,427 in a savings account his brother Haley has saved an amount with a 4 that is 1/10 the value of the 4 in Kevin's

11111nata11111 [884]

Answer:

77.5

Step-by-step explanation:

in this excercise the average is 4 months (January, Febuary, March, April)

the average rate is:

$\frac{1450-1140}{4} =\frac{310}{4} = 77.5$

6 0

3 years ago

Which of the following would produce a standard error of 2 points? n = 5 scores from a population with σ = 20 n = 5 scores from

baherus [9]

Answer:

n = 100 scores from a population with σ = 20

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation, which is also called standard error, of $s = \frac{\sigma}{\sqrt{n}}$