Evaluate the expression.
-2x + 3y; x = 3, y = 4
Answer:
6
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
-2x + 3y
x = 3
y = 4
Step 2: Evaluate
Substitute: -2(3) + 3(4)Multiply: -6 + 12Add: 6Identify the domain and range of each relation. Is the relation a function? Explain.
Answer:
Domain = city
Range = team
this is not a function, because each input should only have one output. There should not be 2 arrows coming out of a domain or known as the x.
solve the proportion. 6/8=y/12
Answer:
y=9
Step-by-step explanation:
I drew a model to help me
Jayla is at a family reunion and would like
to know what the range is, of the ages of
everyone present. Here are the ages of
everyone at her reunion:
35, 2, 7, 33, 25, 70, 75, 40, 42, 12, 15, 7, 44,
20, 25, 3, 65, 62
What is the range?
A class of 160 students contain 40 honor students, 60 athletes, and 80 who are neither athletes nor honor students. From the entire group a student is chosen at random. What is the probability that the student is an honor student given that he is an athlete
1/2
1/3
1/8
Answer:
⅛
Step-by-step explanation:
let x represent students who are both honor students and athletes
60+80+40-x=160
180-x=160
x=189-160=20
The probability=20/160=⅛
Answer:
The correct answer is 1/3
Step-by-step explanation:
In a group of 100 students, 40 like Computer Science (group A), 30 like Philosophy
(group B), and 20 like both (group A∩B). If a student chosen randomly likes Computer
Science, what is the probability that they also like Philosophy?
Given:
Total number of student = 40
Students who like Computer Science (group A) = 40
Students who like Philosophy (group B) = 30
Students who like both (group A∩B) = 20
To find:
If a student chosen randomly likes Computer Science, what is the probability that they also like Philosophy?
Solution:
Let the following events,
A: Student like Computer Science
B: Student like Philosophy
Now,
[tex]P(A)=\dfrac{40}{100}=0.4[/tex]
[tex]P(B)=\dfrac{30}{100}=0.3[/tex]
[tex]P(A\cap B)=\dfrac{20}{100}=0.2[/tex]
We need to find the probability that the student like Philosophy if it is given that he likes Computer science, i.e, [tex]P(\dfrac{B}{A})[/tex].
Using conditional probability, we get
[tex]P(\dfrac{B}{A})=\dfrac{P(A\cap B)}{P(A)}[/tex]
[tex]P(\dfrac{B}{A})=\dfrac{0.2}{0.4}[/tex]
[tex]P(\dfrac{B}{A})=\dfrac{1}{2}[/tex]
[tex]P(\dfrac{B}{A})=0.5[/tex]
Therefore, the required probability is 0.5.
HELP ME PLEASE I WILL PUT U AS BRILLIANT
Answer:
2 and 1/4
Step-by-step explanation:
3.5 - 1.25 = 2.25
2.25 as a mixed number is 2 and 1/4
How many 3-letter "words" can be formed from the standard 26-letter alphabet, if the first letter must be a vowel (A, E, I, O, or U)? (We aren't necessarily talking about English words; something like EQX is perfectly valid here.)
Answer:
3380
Step-by-step explanation:
There are five choices for the first letter, and 26 choices each for the middle and last letters.
So,
5*26*26=3380
Help me out here real quick please
Answer:
25
Step-by-step explanation:
10÷1/4=25
Y= |x| + 2
Complete the table below
Answer:
5
3
2
3
5
Step-by-step explanation:
adam is going to a carnival that has games and rides. each game costs $1.50 and each ride costs $3. Adam spent $15 altogether. number of games played was 3 times the number of rides. grapically solve
The number of games played is 6 and the number of rides is 2.
Here it is given that the number of games played was 3 times the number of rides. So, by this, we get the value of both is the ratio.
That is,
number of games played: number of rides = 3: 1
Let x be the common ratio. So, we have
Number of games played = 3x, and number of rides = x
It is given that the cost of each game is $1.50 and cost of each ride is $3 and the total cost is $15.
By this, we get an equation,
1.50 × 3x + 3 × x = 15
4.5x + 3x = 15
7.5x = 15
x = 2
Therefore the number of games= 3x = 3×2 = 6
The number of rides = x = 2
To know more about the ratio and proportion refer to the link given below:
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suppose that you have made a batch of orange paint by mixing 2 cups of red paint and 1/3 cups of yellow paint. What are some other combinations of numbers of cups of red paint and yellow paint that you can mix to make the same shade of orange?
Answer:
6 red and 1 yellow
Step-by-step explanation:
Multiply 2 and 1/3 by the same value
* 2
4 Red and 2/3 Yellow
*3
6 red and 1 yellow
Etc.
How do I solve this problem?
Marla bought twice as many pounds of cherries as grapes. She paid $15.00 for a total of 4.5 pounds of both items. Cherries cost twice as much as grapes. How much do grapes cost per pound?
For the grapes he paid 5.695 and the cherries 10.005. The cherries cost him $4.64 extra, which is the correct answer.
3 x 1.45 = 4.35
1.45 x .2 = .29
4.35 +.29 = 4.64
What are cherries ?A cherry is a fruit that is a fleshy drupe that is produced by numerous plants in the genus Prunus. Prunus avium and Prunus cerasus, two species with sweet and tart varieties, respectively, are cultivars from which commercial cherries are produced.
Cherries have a low calorie count and are packed with fiber, vitamins, minerals, nutrients, and other healthy elements. A, C, and K vitamins are provided. Potassium, magnesium, and calcium are also present in each fruit with a long stem. Beta-carotene, an antioxidant, and choline, a necessary nutrient, are also brought by them.
To learn more about cherries from the given link:
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The number of a certain bacteria in a sample of refrigerated food product is given by, n(c)=10c2-20c+600, where c is degrees Celsius. Evaluate n(5) and describe the meaning of your answer.
The number of bacteria in a sample of refrigerated food product at 5 degrees Celsius is 750
How to determine the valueGiven the function;
n(c)=10c² - 20c + 600
Where:
n represents the number of certain bacteria in a sample of refrigerated food product c is the degrees CelsiusTo determine n(5), we substitute the value of c as 5 degrees
We have;
n(5) = 10(5)² - 20(5) + 600
Find the square
n(5) = 10(25) - 100 + 600
n(5) = 250 - 100 + 600
n(5) = 750
Thus, the number of bacteria in a sample of refrigerated food product at 5 degrees Celsius is 750
Learn more about functions here:
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What is the range of the function?
Answer:
(0, 10)
Step-by-step explanation:
There is a dotted line at the end, therefore, it doesn't keep going so its (0, 10)
Uhhh how many cookies will she put in each container
Answer:
Step-by-step explanation:
You didn't put anything to solve
Answer:
She will put as many cookies that will fit in the containers she has.
PLS HELP I WILL MARK BRAINLIST IF CORRECT!!
Answer:
B
Step-by-step explanation:
Answer:
B) 8
Step-by-step explanation:
If you multiply 8 times 3, that will give you 24. But you'll have to subtract 6 afterwards. 24 - 6 is 18.
Order used:
P:arenthesis
E:xponents
M:ultipication
D:ivision
A:ddition
S:ubtraction
Multiplication comes before subtraction.
A landlord hires a plumber to fix a burst pipe in a basement. The
plumber charges a one-time service charge of $80 plus an hourly fee.
The total cost the landlord had to pay the plumber for 3 hours of work
was $350.
Write an equation to represent
the situation:
Solve the equation to find the
plumber's hourly fee:
Type your equation here
Solve your equation here
Answer:
Step-by-step explanation:
80x3=240
350-240=110
Answer:
answerr above me
Step-by-step explanation:
Find the solution of the system of equations.
8x + 6y = 28
9x + 3y = 39
A long distance runner started on a course running at an average speed of 6 mph. One hour later, a second runner began the same course at an average
speed of 8 mph. How long after the second runner started will the second
runner overtake the first runner?
Answer:
can you send me book question photo
Four more than three times a number is greater than twenty-two.
and please solve.
Answer:
3x + 4>22 or x>6
Step-by-step explanation:
four more = +4
three times a number = 3(x)
greater than twenty two = >22
so
3x + 4 > 22
that's the equation now if it were to be solved
3x + 4 > 22
-4 -4
3x > 18
/3 /3
x > 6
X+1 , 2x+3 and X+7 are the second, third and fourth terms of an arithmetic series. Find the value of X and hence calculate the common difference.
Answer:
x = 1,
Common Difference = -3
Step-by-step explanation:
Each number in series has the same difference, hence
(x + 1) - (2x+3) = (2x + 3) - (x + 7) Solve to find => x = 1Plug in value of x into (x+1) - (2x+3)Which solves for -3
Answer:
x=1
c.d.=3
Step-by-step explanation:
2(2x+3)=x+1+x+7
4x+6=2x+8
4x-2x=8-6
2x=2
x=1
so terms are 2,5,8
c.d.=5-2=3
Multiply. Write your answer as a fraction in simplest form. 2/3 x 1/11 x 3/5
2/55
Step-by-step explanation:Problem:
2/3 * 1/11 * 3/5 = ?
First, multiply all the numerators:
2 * 1 * 3 = 6
Next, multiply all the denominators:
3 * 11 * 5 = 165
Put the product of the numerator over the product of the denominator:
6/165
Find a GCF and divide both numbers by it:
6 / 3 = 2
165 / 3 = 55
Simplest Form:
2/55
Solve the distance, rate, time problem using a system of two linear equations in two variables.
A plane can travel 960 miles in 2 hours (120 minutes) with a tailwind. The return trip against the wind takes 2 hours and 40 minutes (160 minutes). Find the speed of the plane in still air and the speed of the wind.
Define two variables (state what each variable represents).
Set up a system of two linear equations using the two variables defined in part (A).
Solve the system of equations by addition or substitution.
State your answer as a sentence and include units.
Answer:
960 would be correct becasue it says it in the problem.
Helppppp!!!
Every hour, the radio station
plays 16 commercials that are
a total 13 minutes in length. If
x represents a 30-second
commercial and y is a 60-
second commercial, how many
of each type of commercial is
played?
Enter the equations that
represent the scenario into the
graphing calculator to find how
many of each type of
commercial is played.
x + y = 16
0.5x + y = 13
In one hour, the radio station
plays commercials that are 30 seconds long. In one hour, the radio station plays commercials that are 60 seconds long
Answer:
it would be 6 and 10
Step-by-step explanation:
Answer:
the answer is
6
10
Step-by-step explanation:
im taking the assignment
One Friday the temperature in a town at 5:00PM was 7 degrees Fahrenheit which was 13 degrees warmer than at 9 AM
What was the temperature in degrees Fahrenheit at 9:00 AM?
Answer:
-6° F
Step-by-step explanation:
Mark can walk 1.5 miles in 15 minutes how far can mark walk in 25 minutes
Answer:
Step-by-step explanation:
15min=1.5miles
25min=1.5*25=37.5/15
mark walks 2.5miles in 25minutes.
Answer:
2.5
Step-by-step explanation:
15/15 = 1
Do the same for 1.5/15 = 0.1 x 25 = 2.5
state which theorem you can use to show that the quadrilateral is a parallelogram.
Answer:
If one pair of opposite sides in a four sided figure are both opposite and parallel, then the figure is a parallelogram.
Step-by-step explanation:
My Real pic is my dp... ✧༺♥༻✧
what’s the answer to this question
Sandra Jean ears an annual
salary of $38,400.00. What is
her monthly salary?
Answer:$3200
Step-by-step explanation:
38,400 divided by 12 = $3200