At what rate of interest will rs 2500 amt to rs 3200 in 7 years

X +(x+1)+(x+2) = 132 (pls help me)

erastova [34]

x = 4

may it helpful for you

mark me as brainlist

8 0

2 years ago

Read 2 more answers

In a given year, the average annual salary of a NFL football player was $189,000 with a standard deviation of $20,500. If a samp

nika2105 [10]

Answer:

15.15% probability that the sample mean will be $192,000 or more.

Step-by-step explanation:

To solve this problem, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

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.

Central Limit Theorem

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

In this problem, we have that:

$\mu = 189000, \sigma = 20500, n = 50, s = \frac{20500}{\sqrt{50}} = 2899.14$

The probability that the sample mean will be $192,000 or more is

This is 1 subtracted by the pvalue of z when X = 192000. So

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

By the Central Limit Theorem

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

$Z = \frac{192000 - 189000}{2899.14}$

$Z = 1.03$

$Z = 1.03$ has a pvalue of 0.8485.

1-0.8485 = 0.1515

15.15% probability that the sample mean will be $192,000 or more.

7 0

2 years ago

Solve for x: -2x - 5 = 4

Nata [24]

Answer:

x=−20

Step-by-step explanation:

Step by Step Solution:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

x/5-(-4)=0

Step by step solution :

STEP

1

:

x

Simplify —

5

Equation at the end of step

1

:

x

— - -4 = 0

5

STEP

2

:

Rewriting the whole as an Equivalent Fraction

2.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 5 as the denominator :

-4 -4 • 5

-4 = —— = ——————

1 5

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

x - (-4 • 5) x + 20

———————————— = ——————

5 5

Equation at the end of step

2

:

x + 20

—————— = 0

5

STEP

3

:

When a fraction equals zero

3.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

x+20

———— • 5 = 0 • 5

5

Now, on the left hand side, the 5 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

x+20 = 0

Solving a Single Variable Equation:

3.2 Solve : x+20 = 0

Subtract 20 from both sides of the equation :

x = -20

One solution was found :

x = -20

8 0

3 years ago

Read 2 more answers

Helping my 2nd grader with his math homework and came across this. I don't know Common Core but I can find the sum "the old fash

n200080 [17]

427+316

step one- add 400 and 300=700
step two- take 3 from the 16 and add it to the 27 and add - 27+3+13=43
step three- add 43 and 700

I think that the common core way just adds more steps and makes it more complicated than just adding it regularly, but that's just me.

3 0

3 years ago

Read 2 more answers

AB is tangent to circle O. If AO=24 and BC=50, what is AB? The diagram is not to scale.

Oksana_A [137]

Answer:

The correct option is 70

Step-by-step explanation:

It is a right triangle so we will use Pythagorean theorem to find AB:

We have One side = 24 and hypotenuse = 24+50 which is 74

Now apply Pythagorean theorem:

AB = √(74)²-(24)²

AB = √5476-576

AB= √4900

Take the square root of 4900.

AB= 70

Thus the correct option is 70....

8 0

3 years ago

At what rate of interest will rs 2500 amt to rs 3200 in 7 years​

At what rate of interest will rs 2500 amt to rs 3200 in 7 years