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Olegator [25]
3 years ago
8

3/10+(-1/3) Subtract. 10. 14 - (-8)13. 2/3-3/2​

Mathematics
1 answer:
Ierofanga [76]3 years ago
5 0

Answer:

See below in bold.

Step-by-step explanation:

3/10 + (-1/3)

= 3/10 - 1/3

Convert the fractions to denominator 30:

= 9/30 -10/30

= -1/30.

10. 14 - (-8)

= 14 + 8

= 22.

13. 2/3 - 3/2

The least common denominator is 6 so we have:

= 4/6 - 9/6

= - 5/6.

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When Brad was born, his Grandma put, $1,500 in a new account for him. Since then, the balance of the account, has grown by 6.5%
marin [14]

Answer:

$969.04

Step-by-step explanation:

now at age of 18 Brad has 1500 * 1,065^18

at age of 21 he will have 1500 * 1,065^21

if he waits the difference will be 1500 * 1,065^21 - 1500 * 1,065^18 = $969.04

6 0
3 years ago
Ashley wants to find out how much money she has in her piggy bank. She has x number of quarters and y number of dimes and says t
patriot [66]
Amount from dimes would be: 0.1y
Amount from quarters = 0.25x

So, total amount = 0.25x + 0.1y

So, she is not correct

Hope this 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

Significantly low:

Z-scores of -2 or lower

So scores of X when Z = -2 or lower

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

-2 = \frac{X - 20.6}{5.2}

X - 20.6 = -2*5.2

X = 10.2

Test scores of 10.2 or lower are significantly low.

Significantly high:

Z-scores of 2 or higher

So scores of X when Z = 2 or higher

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

2 = \frac{X - 20.6}{5.2}

X - 20.6 = 2*5.2

X = 31

Test scores of 31 or higher are significantly high

6 0
4 years ago
Complete the steps to add 3 2/5 +1 3/10 . 1. Write mixed numbers as improper fractions. 2. Write equivalent fractions with a com
ira [324]

Answer:

47/10 = 4 7/10

Step-by-step explanation:

3 2/5 + 1 3/10

1. Write mixed numbers as improper fractions:

17/5 + 13/10

2. Write equivalent fractions with a common denominator:

34/10 + 13/10

3. Add the numerators over the common denominator.

47/10

4. Simplify.

4 7/10

3 0
4 years ago
Read 2 more answers
What expression is equivalent to 13-(-21)
Kruka [31]

Answer:

13+21

Step-by-step explanation:

Remember this, two negatives equals a positive.

As a result, the answer is 13+21

5 0
4 years ago
Read 2 more answers
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