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3 years ago

Translate into an equation and solve. Three-fifths of a number is negative twenty-one. Find the number.

Mathematics

1 answer:

ki77a [65]3 years ago

5 0

Answer:

-21 3/5

Step-by-step explanation:

May i have brainliest

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An experiment consists of 400 observations and four mutually exclusive groups. if the probability of a randomly selected item be

Montano1993 [528]

There are four mutually exclusive groups, therefore, the probability of one item being classified into any of the four groups is 1/4 or 0.25.

The expected number of items is calculated as the product of the probability and the total number of observations. For this problem, the probability of an item being classified to group 1 is 0.25 and the total number of observations is 400. Therefore, the expected number of items is
$Expected\:number\:of\:items=0.25\times 400=100$

The expected number is 100.

5 0

4 years ago

2p/9+5p/18-5/6=2/3+p/12+1/6

Murljashka [212]

$\frac{2p}{9} + \frac{5p}{18} - \frac{5}{6} = \frac{2}{3} + \frac{p}{12} + \frac{1}{6}$
$\frac{4p}{18} + \frac{5p}{18} - \frac{5}{6} = \frac{2}{3} + \frac{p}{12} + \frac{1}{6}$
$\frac{9p}{18} - \frac{5}{6} = \frac{4}{6} + \frac{1}{6} + \frac{p}{12}$
$\frac{p}{2} - \frac{5}{6} = \frac{5}{6} + \frac{p}{12}$
$\frac{p}{2} - \frac{5}{6} + \frac{5}{6} = \frac{5}{6} + \frac{5}{6} + \frac{p}{12}$
$\frac{6p}{12} = 1\frac{2}{3} + \frac{p}{12}$
$\frac{6p}{12} - \frac{p}{12} = 1\frac{2}{3} + \frac{p}{12} - \frac{p}{12}$
$\frac{12}{5} * \frac{5p}{12} = 1\frac{2}{3} * \frac{12}{5}$
$p = 4$

7 0

3 years ago

Calculate a5 for the geometric sequence in which a1=1600 and the common ratio is 3/4.

Cloud [144]

Answer:

a₅ = 506.25 option a

Step-by-step explanation:

Given that,

first term a₁ = 1600

common ratio (r) = $\frac{3}{4}$

We need to find the fifth term of the geometric progression

We know that the nth term formula

aₙ = a₁rⁿ-¹

where a₁ is first term and r is the common ratio

n is the number of terms

So, n = 5

a₅ = 1600 $(\frac{3}{4})^{5-1}$

a₅ = 1600* $(\frac{3}{4}) ^{4}$

a₅ = 1600*81/256

a₅ = $\frac{2025}{4}$

a₅ = 506.25 option a

That's the final answer

8 0

3 years ago

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Algebra 1 help please

Karo-lina-s [1.5K]

Short leg = 18 Long leg= 24 Hypotenuse= 30 My calculations were simple trial and error. I started with a trial of 10 for the short leg to begin with, averaging and estimating the appropriate proportions based off 6 additional increments. Sorry I don't have an algebraic method for you. Hope this has helped somewhat :)

7 0

3 years ago

Which expression is equivalent to 5.42 x 10-4?

storchak [24]

Answer:

54.2 - 4

Because when you multiply 5.42 and 10 and subtract it by 4 the answer is the same.

3 0

3 years ago

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