PLEASE HELPPPPPP!!!!!!! [easy]

Someone please help I will give u 1¢

Darya [45]

Answer:

3rd option

y=1/2 x-3

7 0

3 years ago

Find the actual sum of 1 3/4 + 1 5/8 to determine how much David grew in two years. Explain how you know your answer is reasonab

svetoff [14.1K]

Answer:

$3\frac{3}{8}$

Step-by-step explanation:

Find the sum

$1\frac{3}{4} +1\frac{5}{8}$

we know that

$\frac{3}{4}=\frac{6}{8}$

substitute

$1\frac{6}{8} +1\frac{5}{8}$

step 1

Separate the mixed number into a whole number and a fraction number

$1+\frac{6}{8} +1+\frac{5}{8}$

step 2

Group the whole numbers an the fraction numbers

$(1+1)+(\frac{6}{8} +\frac{5}{8})$

step 3

Combine like terms

$(2)+(\frac{11}{8})$

Remember that

$\frac{11}{8}=\frac{8}{8}+\frac{3}{8}=1+\frac{3}{8}$

substitute

$2+1+\frac{3}{8}$

$3+\frac{3}{8}=3\frac{3}{8}$

The answer is reasonable

Because

I know that 1 3/4 < 2 and 1 5/8 < 2

so

The sum of both numbers must be less than 4

6 0

3 years ago

Harco<br> Find the inverse function f-¹(x) for the given function f(x).<br> 5. f(x) = 4x-8

ipn [44]

The inverse function for the given function f(x) = 4x - 2 is x/4 + 2

or, f⁻¹(x) = x/4 + 2

Given function, f(x) = 4x-8

We have to find f⁻¹(x)

f(x) = 4x - 8

or, y = 4x - 8

Interchanging the x variable with y,

x = 4y - 8

Solving y,

x = 4(y - 2)

or, x/4 = y - 2

or, y = x/4 + 2

Now, replacing y with f⁻¹(x), we get;

f⁻¹(x) = x/4 + 2

For verifying, you can use

(f · f⁻¹ )(x) = x

Therefore, the inverse function of f(x) is x/4 + 2.

To learn more about the inverse functions, visit: brainly.com/question/14965513

#SPJ9

6 0

2 years ago

The cost of a taxi ride is equal to $3.50 plus $0.25 for each mile. If a ride costs a total of $6.75 how long was the ride?

jeka57 [31]

Answer:

13 miles

Step-by-step explanation:

Write and solve an equation involving this information, using x as the distance traveled, in miles:

Cost(x) = $6.75 = $3.50 + ($0.25/mile)x

First, subtract $3.50 from both sides, obtaining: $3.25 = ($.25/mile)x.

Next, divide both sides by $0.25/mile:

$3.25

x = ------------------ = 13 miles

$0.25/mile

The length of the taxi ride was 13 miles.

7 0

3 years ago

if you roll a fair 6-sided die 9 times, what is the probability that at least 2 of the rolls come up as a 3 or a 4?

Kay [80]

Using the binomial distribution, it is found that there is a 0.857 = 85.7% probability that at least 2 of the rolls come up as a 3 or a 4.

For each die, there are only two possible outcomes, either a 3 or a 4 is rolled, or it is not. The result of a roll is independent of any other roll, hence, the <em>binomial distribution</em> is used to solve this question.

Binomial probability distribution

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

There are 9 rolls, hence $n = 9$ .

Of the six sides, 2 are 3 or 4, hence $p = \frac{2}{6} = 0.3333$

The desired probability is:

$P(X \geq 2) = 1 - P(X < 2)$

In which:

$P(X < 2) = P(X = 0) + P(X = 1)$

Then

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{9,0}.(0.3333)^{0}.(0.6667)^{9} = 0.026$

$P(X = 1) = C_{9,1}.(0.3333)^{1}.(0.6667)^{8} = 0.117$

Then:

$P(X < 2) = P(X = 0) + P(X = 1) = 0.026 + 0.117 = 0.143$

$P(X \geq 2) = 1 - P(X < 2) = 1 - 0.143 = 0.857$

0.857 = 85.7% probability that at least 2 of the rolls come up as a 3 or a 4.

For more on the binomial distribution, you can check brainly.com/question/24863377

7 0

3 years ago