Answer:
75
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityGeometry
Sum of Angles in a Quadrilateral: 360Step-by-step explanation:
Step 1: Set up
75 + 120 + 90 + ∠4 = 360
Step 2: Solve
Add: 285 + ∠4 = 360[Subtraction Property of Equality] Subtract 285 on both sides: ∠4 = 75last year 1/5 of the students in your class played a sport this year 10 students join the class five of the new students play a sport now 1/4 of the students play a sport how many students are in your class now
Answer:
60
Step-by-step explanation:
last year 1/5 of the class played sports, so s = (1/5) c
the next year, s increased by 5, c increased by 10 and the fraction changed to 1/4, so for the next year (s+5) = (1/4)(c+10)
To solve this we can substitute s = (1/5)c from the first equation into the second, so
((1/5)c + 5)=(1/4)(c+10), simplify both sides
(1/5)c + 5 = (1/4)c + 10/4, simplify 10/4 to 5/2
(1/5)c + 5 = (1/4)c + 5/2, multiply both sides by 20 to eliminate fractions (least common multiple of 2, 4 and 5)
4c + 100 = 5c + 50, subtract 4c, subtract 50 from both sides
50 = c, number of students in class last year was 50, this year is 10 more, so this year is 60
what is the answer please really stuck
Answer:
X is 30
Step-by-step explanation:
X is 30
23 plus 8 times 2
A park planner is designing a dog park
Answer:
Un planificador de parques está diseñando un parque para perros
What is the solution of the equation x2 = 64?
Answer:
8
Step-by-step explanation:
8 * 8 = 64
Hope this helps!
The residual for Raisin Bran is 8.556. How many grams of sugar does Raisin Bran actually have per cup
Answer:
Note: The full question is attached as picture below
a. Slope of 0.536 means that when there is an increase in carbohydrate content, there will be sn increase in 0.536 grams of sugar content.
b. Coefficient of Determination, R^(2) = 0.544^(2) = 0.295936 = 0.296. Percent of variation = 29.6
c. For carbohydrate content of 29 grams,
Predicted amount of sugar per cup for Raisin Bran = -5.10 + 0.536*29 = 10.444 gram
d. Residual value= Actual value - Predicted value
8.556 = Actual sugar content - 10.444
Actual sugar content = 8.556 +10.444
Actual sugar content = 19
So, the Raisin Bran actually have 19 grams of sugar per cup.
(40 points) please help the owners of pet store plan to purchase some hamsters and some rabbits. Each hamster costs 15 and each rabbit costs 25 each. the owners have at most 300 to spend
Answer:
10 hamsters and 6 rabbits
Step-by-step explanation:
if you take 10x15 for the hamsters you get $150 and then if you take 25x6 you get $150 for the rabbits then add those two numbers and you get $300.
You purchase 2.4 meters of nylon cord to make 8 friendship bracelets. How many centimeters are in each bracelet?
A. 0.3 cm
B. 3 cm
C. 7.2 cm
D. 30 cm
Answer:
A. 0.3 cm
Step-by-step explanation:
2.4m÷8=0.3cm
2.4 meters devide by 8 equals to 0.3 centimeter
Answer:
Step-by-step explanation:
30 cm is the correct answer
A total of 472 tickets were sold. They were either adult tickets or student tickets. The number of student tickets were 3 times tge number of adult tickets sold. How many adult tickets were sold?
Answer:
adult tickets = 118
student tickets = 354
Step-by-step explanation:
a = number of adult tickets
s = number of student tickets
a + s = 472
3a = s
substitute for s
a + 3a = 472
reduce
4a = 472
divide by 4
4a/4 = 472/4
a = 118
s = 354
5x-4y =-10 what is x and y i need the numbers
Answer:
x=2(2y-5) over 5 , y=-5(-x-2) over 4
Use the commutative property to write an expression equivalent to -5d + 1/2.
Answer:
1/2 + -5d
Step-by-step explanation:
lan worked 25 hours at the grocery store last week and 36 hours this week.
What is the percent change?
O 44% Increase
O 44% Decrease
O 31% Increase
O 31% Decrease
Fill in the missing numbers to write an equation for each linear table. Helppp please
What is the y intercept of the graph
A. -2
B. 2
C. -4
D. 4
Answer:
option C = -4
Step-by-step explanation:
Because the line is in the y-axis of -4
Option C) -4
REASON:the line is on the Y axis of -4
Write the expression
a2b3c2d in expanded
form.
Answer:
a*2+b*2+c*2+d
Step-by-step explanation:
If i's meant to be Pythagorean theorem, a*a+b*b=c*c
find the sequence 13, __, 33, __, 53
Answer:
Each new number adds 10 (you could also write the equation 3 + 10n where n is the position of the number in the sequence)
The blanks are 23 and 43
Step-by-step explanation:
In two numbers it goes up by 20, so in one it will go up by 10.
This means the blanks are 13 + 10 = 23 and 33 + 10 = 43
To help retain its readership base in the digital era, a magazine is considering the launch of an online edition. However, it will only be feasible to publish an online edition if more than 35% of current readers would subscribe to the online edition. The magazine contacted a simple random sample of 587 current readers, of which 227 said they would be interested in the online edition. Conduct a hypothesis test to help the magazine decide if it should launch the online edition or not.
Answer:
Hо:p = 0.35
H1:p > 0.35
Step-by-step explanation:
The magazine wants to check if the the proportion of readers interested in the online edition is equal to 35% (0.35) or greater than 35% (>0.35). Denote by p, the proportion of readers interested in the online edition. Then the null hypothesis,the hypothesis that contains equal-to sign- will be Hо:p = 0.35 and the alternative hypothesis will be H1:p > 0.35.
1.ABCD is a rectangle.its diagonals meet at O.lif AO = 5x-1 and BO =
4x+9.find the length of the diagonals.(lengths in cm)
Answer:
[tex]Length = 98[/tex]
Step-by-step explanation:
Given
[tex]AO = 5x - 1[/tex]
[tex]BO = 4x + 9[/tex]
Required:
The length of the diagonal
Since AO and BO are diagonals that meets at O, we have:
[tex]AO=BO[/tex]
This gives
[tex]5x - 1 = 4x + 9[/tex]
Collect Like Terms
[tex]5x - 4x = 1 + 9[/tex]
[tex]x = 10[/tex]
Subsitute 10 for x in [tex]AO = 5x - 1[/tex]
[tex]AO = 5 * 10 - 1[/tex]
[tex]AO = 50 - 1[/tex]
[tex]AO = 49[/tex]
The length of the diameter is:
[tex]Length = AO * 2[/tex]
[tex]Length = 49 * 2[/tex]
[tex]Length = 98[/tex]
Select two expressions that are equivalent to 8(5t + 7v)
Answer:
what are the answer choices?
Step-by-step explanation:
no choices, no answer
Answer:
A and D are the correct answers hope this helps :)
HELPPPPPPPPP I WILL GIVE U THE BRAINLEST!!!!!!!!
Answer:
r = 14
d = 28
r^2=28
Circumference = 87.96
C=2πr=2·π·14≈87.96459
Andrea uses 8.1 pints of white paint and blue paint to paint her bedroom walls.
4/5 of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use to paint her bedroom walls
Answer:
2.025 pints of blue paint
Step-by-step explanation:
4/5 = 80/100 or 80%
8.1 is 80% of 10.125
10.125 is the total pints of paint used.
If 8.1 of those pints of paint are white, then the rest of the paint must be blue.
10.125 - 8.1 = 2.025
1. Which of the following expressions when evaluating yields 5?
a. 10x3 + 6
b. 5 -5 x 6
c. 24 - 6 - 12
Answer:
b
Step-by-step explanation:
10x3+6= 36
5-5x6= -25
24-6-12=6
Solve for x: -8 < x - 1 < 5
Answer: −7<x<6
Step-by-step explanation:
−8<x−1<5
−8+1<x−1+1<5+1(Add 1 to all parts)
−7<x<6
The heights, in inches, for 120 people (male and female) have been measured. The results are presented:Heights sample data: 66.13 65.84 69.19 61.94 68.86 65.66 70.19 59.54 70.29 62.64 67.59 61.29 66.34 65.19 62.7 64.96 70.35 71.36 70.29 62.21 73.46 65.74 66.22 64.28 66.56 66.5 68.55 67.01 61.13 66.93 63.98 65.88 66.02 69.86 65.5 61.14 62.27 64.93 66.04 71.74 68.69 65.27 67.39 66.01 67.51 67.41 67.62 66.2 65.25 64.78 68.87 68.5 67.17 62.62 61.76 63.41 64.73 65.22 62.14 68.19 67.59 68.64 66.3 66.34 65.66 63.14 69.68 68.07 63.1 66.86 62.2 69.44 65.35 61.53 59.7 61.12 69.98 66.52 63.27 65.69 70.76 68.02 69.35 65.45 70.28 62.04 69.28 63.45 67.52 63.37 64.47 68.82 73.15 62.47 65.56 68.28 67.66 63.81 66.39 69.88 67.26 65.5 66.33 65.75 68.83 71.8 64.6 69.95 66.8 70.82 66.71 67.11 69.23 70.71 64.32 67.18 65.1 64.79 62.58 67.2 a)Calculate the mean and standard deviation for the sample. Give your answers to 2 decimal places. sample mean
Answer:
70.4
Step-by-step explanation:
hwhbsbsjsksjjsjdhdh
Which point on the diagram shows the minimum value of y?
Answer:
Step-by-step explanation:
ok
A quadrilateral ABCD has the given angle measures. Select all measurements which
could come from a cyclic quadrilateral.
A:
angle A is 90°, angle B is 90°, angle C is 90°, and angle D is 90°
B:
angle A is 80°, angle B is 80°, angle C is 100°, and angle C is 100°
C:
angle A is 70°, angle B is 110°, angle C is 70°, and angle D is 110°
D:
angle A is 60°, angle B is 50°, angleC is 120°, and angle D is 130°
E:
angle A is 50°, angle B is 40°, angle C is 120°, and angle D is 150°
Answer:
A: angle A is 90°, angle B is 90°, angle C is 90°, and angle D is 90°
B: angle A is 80°, angle B is 80°, angle C is 100°, and angle C is 100°
D: angle A is 60°, angle B is 50°, angle C is 120°, and angle D is 130°
Step-by-step explanation:
The sum of opposite angles of a cyclic quadrilateral is 180°
It must satisfy the following:
A+C=180° and B+D=180°
Only choice A and B and D satisfy.
The correct options are options A, B, and D.
What is a cyclic quadrilateral?A quadrilateral having all its corners on a circle plus opposite angles' sum is 180° called a cyclic quadrilateral.
A) ∠A =90°
∠B=90°
∠C =90°
∠D =90°
∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
B) ∠A =80°
∠B=80°
∠C =100°
∠D =10 0°
∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
Similarly, options C, D, and E also can be checked whether they can come from a cyclic quadrilateral or not.
C) Cannot come from a cyclic quadrilateral since ∠A + ∠C =140°≠180°.
D) ∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
E)Cannot come from a cyclic quadrilateral since∠A + ∠C = 170°≠180°.
Therefore, The correct options are options A, B, and D.
To get more about the cyclic quadrilateral visit:
https://brainly.com/question/24142962
Pavan saves $x each month.His two brothers each save $4 more than Pavan each month.
Altogether the three boys save $26 each month.
(a) Write down an equation in x.
Answer:
a)(4+x) + (4+x) + x= 26
b) x=6
Step-by-step explanation:
pavan=x
brother 1=4+x
brother 2=4+x
brother 1=brother 2
a)
(4+x) + (4+x) + x= 26
b)
(4+x) + (4+x) + x= 26
=> 8+3x=26
=>
take 8 to 26
=>
3x=26-8=18
take 3 to 18 side
x=18/3=6
therefore pavan saves 6$ per month
On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, negative 7) and (0, 2). Everything to the left of the line is shaded. Which linear inequality is represented by the graph?
Answer:
y>3x+2
Step-by-step explanation:
1. use y2-y1/x2-x1 to find the slope (3)
2. since the y-intercept is already give as (0,2) we have the equation y=3x+2
3. finally since the left side is shaded, that would mean everything greater than that equation can equal y therefore y>3x+2
Answer:
Beans
Step-by-step explanation:
Mike, Kate, and Wendy are sick with the flu, but they still come to
school on Monday. They arrive at 8am. By 9am (Hour 1), each of them
has already infected two of his or her friends. By 10am (Hour 2), each of
Mike's, Kate's, and Wendy's friends infect two other people, meaning 12
new people have been infected by the second hour.
a. If the school day ends at 3pm, how many students in all will be
infected at the end of the school day?
Select the correct answer.
The equation of a line is y = -3x – 2. What are the slope and the y-intercept of the line?
A.
slope = -3 and y-intercept = 2
B.
slope = 3 and y-intercept = -2
C.
slope = 3 and y-intercept = 2
D.
slope = -3 and y-intercept = -2
Answer:
The answer is D slope = -3 y-intercept = -2
Step-by-step explanation:
Answer
D.
Step-by-step explanation:
The first part of the equation is -3 and the second part is -2. The number attached to the variable is the "slope" and the number coming after the variable is the y intercept.
Triangle ABC is rotated 45° counterclockwise about vertex A to obtain triangle XYZ. If the m∠ABC is equal to 30°, what is the m∠XYZ? Neeed this fast asap
15°
30°
45°
75°
Answer:
B,30
Step-by-step explanation:
Answer:
B,30°
Step-by-step explanation:
