SolveAn airplane went 20 miles an hour faster than twice the speed of a car that ran x miles an hour

Answers

Answer 1

Answer:

The algebraic expression for the given problem is:

Speed of airplane = 2x + 20

What is Expression?

In mathematics, an expression is a combination of numbers, symbols, and operators (such as +, −, ×, ÷, ^) used to represent a quantity or a mathematical relationship between quantities.

" An airplane went 20 miles an hour faster than twice the speed of a car that ran x miles an hour"

The algebraic expression for the given problem is:

Speed of airplane = 2x + 20

Where x is the speed of the car in miles per hour.

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Answer 2

Answer:

Answer: B

Because you can eliminate the ones that don’t have an inequality symbol so that leaves you with B and D and the 20 should be on the right by itself since that is the constant we are given and it’s not altered in the question

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Solve to find the value of x. 40-x/3 = 4+x

Answers

$(40-x)/(3) = 4 + x \n \n 40 - x = 12 + 3x \n \n 40 = 12 + 3x + x \n \n 40 = 12 + 4x \n \n 40 - 12 = 4x \n \n 28 = 4x \n \n (28)/(4) = x \n \n 7 = x \n \n x = 7 \n \n Answer: \fbox {x = 7}$

$(40-x)/(3) = 4 + x\n\n40 - x = 3(4 + x)\n\n40 - x = 12 + 3x\n\n40 = 12 + 4x\n\n4x = 28\n\n\boxed{\bf{x=7}}$

The probability of event X is 30%. The probability of event Y is 40%. If events X and Y are mutually exclusive, what is the probability of event X or Y?70%

12%

10%

35%

Answers

The answer is 70%

Extra words because my answer was too short LOL

Which of the following lines is not parallel to the graph of y= 9x+1?9y-x=2
y-9x=3
9x-y=2
27x-3y=2

Answers

The requried line is not parallel to the graph of y = 9x + 1 is 1. 9y - x = 2. Option A is correct.

To determine which line is not parallel to the graph of y = 9x + 1, we need to compare the slopes of each line to the slope of y = 9x + 1.

The equation y = mx + b represents a line with slope m. In the case of y = 9x + 1, the slope (m) is 9.

Now, let's check the slopes of each equation given:

A. 9y - x = 2:

To write this equation in the form y = mx + b, we rearrange it as y = (1/9)x + 2/9. The slope is (1/9), which is not equal to 9. Therefore, this line is not parallel to y = 9x + 1.

B. y - 9x = 3:

Rearranging this equation as y = 9x + 3, we can see that the slope is 9, which is equal to the slope of y = 9x + 1. Therefore, this line is parallel to y = 9x + 1.

C. 9x - y = 2:

Rewriting this equation in the form y = mx + b, we get y = 9x - 2. The slope is 9, which is equal to the slope of y = 9x + 1. Therefore, this line is parallel to y = 9x + 1.

D. 27x - 3y = 2:

To put this equation in the form y = mx + b, we divide both sides by 3, which gives 9x - y = 2/3. The slope is 9, which is equal to the slope of y = 9x + 1. Therefore, this line is also parallel to y = 9x + 1.

In summary, the line not parallel to the graph of y = 9x + 1 is 1. 9y - x = 2. Option A is correct.

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I hope this helps you

800 children a day ride on the roller coaster, but another 200 are turned away because they're not tall enough. What proportion of the total number of children are turned away?A) Half are turned away
B) One quarter are turned away
C) One fifth are turned away

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction

Answers

$(7)/(24)$ ÷ $(35)/(48)$
Multiply $(7)/(24)$ by the reciprocal of $(35)/(48)$ , which is $(48)/(35)$

= $(7)/(24)$ × $(48)/(35)$
= $(336)/(840)$

We can simplify it further:
The greatest common factor here is 168
$(336/168)/(840/168)$

= $(2)/(5)$

Which relation is a function?A. {(2, 3), (1, 5), (2, 7)}

B. {(-1, 5), (-2, 6), (-3, 7)}

C. {(11, 9), (11, 5), (9, 3)}

D.{(3, 8), (0, 8), (3, -2)}

Answers

Answer: Option B

Step-by-step explanation:

A function has a rule, for each point in the domain, there can be only one point associated in the range.

This means that f(x) can have only one value y that is associated to the point x in the domain.

now, with this in mind, let's analyze the options, where the pairs are always written as (x, y)

A) Here we can see the pairs (2,3) and (2, 7), so we have the point in the domain, 2, that is associated with two different values in the range, so this relation can not be a function.

B) In this set, there are no problems because we do not have ani point in the domain with more than one value in the range, so this can be a function.

C) here point 11 has two different values in the range, so this can not be a function.

D) here point 3 has two different values in the range, so this can not be a function.

b, because for every one you take away from the x value, you add one to the y value

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