No matter what I do,

Mathematics

1 answer:

Genrish500 [490]3 years ago

5 0

Answer:

Step-by-step explanation:

Basically you're multiplying how many coins you have that year by eight.

The fist year you had 4 coins. 4 multiplied by 8 equals 32. Mrs Bradford had 32 coins.

The second year you had 6 coins. 6 multiplied by 8 equals 48. Mrs Bradford had 48 coins.

The third year you had 8 coins. 8 multiplied by 8 equals 64. Mrs Bradford had 64 coins

For the fourth and fifth year you have to add 2 for each year.

So for the 4th year you had 10 coins and 10 multiplied by 8 equals 80. Mr.Bradford had 80 coins.

And Finally for year five you had 12 coins. 12 multiplied by 8 equals 96. Mr.Bradford had 96 coins in year five.

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Write the expression in the simplest terms (x^2-10)+(10^2+2)

Leto [7]

X^2+92 is the simplest form first solve the second parentheses. 10^2+2=102 then add -10. 102+-10 is the same as 102-10=92 plug back in x^2+92.

6 0

4 years ago

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MrRa [10]

Answer:

Step-by-step explanation:

4 0

2 years ago

Simplify.<br><br> 15 20 24+20

WINSTONCH [101]

Answer:

-5 divide by 28

Step-by-step explanation:

so the question supposed be " 15-20 divided by 2(4) + 20

15-20 which is also 15 + (-20)= -5

2(4)=8, 8+20=28

so it can simplify into -5 / 28

(hope it helps :)

5 0

3 years ago

Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi

den301095 [7]

Answer:

Test scores of 10.2 or lower are significantly low.

Test scores of 31 or higher are significantly high

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 20.6, \sigma = 5.2$