1 year ago

Solve for n in the proportion 7/3 = n/21.

1 answer:

7 0

Given ,

7/3 = n/21

We need to find the value of n,

Cross multiplying,we get

3n = 21 x 7

=> 3n = 147

=> n = 147/3

=> n = 49 is the required answer

You might be interested in

Jess gave her a $4.90 tip. The tip was 7% of the cost of the . Write an equation to find b, the cost of the Manicure

Naddik [55]

The formula to finding percentages is x% * y = c. So 7% of $4.90 is 0.343.
( 7% is 0.07)

4 0

3 years ago

What is the equation of the axis of symmetry for the function shown below? y-2=-(x+5)^2?

BigorU [14]

The axis of symmetry is x = -5

8 0

3 years ago

Approximately 85% of persons age 70 to 84 live in their own household and are income-qualified for home purchases.

miv72 [106K]

Answer:

The probability that exactly two of the four live in their own household and are income-qualified is = .0975

Step-by-step explanation:

Given -

Approximately 85% of persons age 70 to 84 live in their own household and are income-qualified for home purchases.

Probability of sucess ( p ) = 85% =.85

Probability of failure ( q ) = 1 - .85 =.15

n = 4

From combination of n events taking r sucess we use binomial distribution

$P(X = r) = \binom{n}{r}p^{r}q^{n-r}$

where , r = 2

the probability that exactly two of the four live in their own household and are income-qualified is =

$P(X = 2) = \binom{4}{2}0.85^{2}0.15^{4 - 2}$

= $\frac{4!}{(2!)(2!)} \times 0.7225 \times .0225$

= $6 \times 0.7225 \times .0225$

= .0975

4 0

3 years ago

A truck has a mass of 56,000 kg and a velocity of 20 m/s. What is the truck’s momentum?

konstantin123 [22]

The answer is 12 to the question
Hopes this helps you with your question!!

4 0

3 years ago

Which number comes next in the series? 1 – 8 – 27 – 64 – 125 – 216 –?

dalvyx [7]

${7}^{3} = 343$

3 0

4 years ago