Answer:
90
Step-by-step explanation:
3 boys
5 girls,
Say that there where "x" number of groups like this, (x will be the total number of groups like this, if one were to divide the population by the number of groups, they would the number of students);
Set up an equation;
x ( 3 + 5 ) = 240
Combine like terms and distribute;
8x = 240
Inverse operations;
8x = 240
/8 /8
x = 30
Substitute back in to find the number of boys;
30 * 3 = 90
Geometry Chapter 4 review
Max practices the piano and the guitar for a total of 150 minutes every day. He practices the guitar for 80 minutes longer than he practices the piano.
Part A: Write a pair of linear equations to show the relationship between the number of minutes Max practices the guitar (x) and the number of minutes he practices the piano (y) every day. (5 points)
Part B: How much time does Max spend practicing the piano every day? Show your work. (3 points)
Part C: Is it possible for Max to have spent 125 minutes practicing the guitar if he practices for a total of exactly 150 minutes and practices the guitar for 80 minutes longer than he practices the piano? Explain your reasoning.
I need an answer ASAP WITH ANSWERS WILL GET BRAINLIEST AND WILL GET 29 POINTS....
Algebra 1
this answer will not be found on brainly because on flvs they mix them up
Answer:
A .x+y=150 y=x+80
B. x=35 y=115
x + (x + 80) = 150
2x + 80 = 150
2x = 70
x =35 practicing the guitar
then put x back in to solve for y
C. no because that is a whole 10 minutes more so it would be for 160 minutes of practice instead.
Step-by-step explanation:
this is my first time answering a question so hope it helps :)
A pair of linear equations to show the relationship between the number of minutes ;
x=Max practices the guitar
y= the number of minutes he practices the piano
Pair of equation are :x+y=150
y=x+80
Part B:The time does Max spend practicing the piano every day:
x=35 y=115 x + (x + 80) = 150 2x + 80 = 150 2x = 70 x =35Subsitute x back in to solve for y.
x+y=150
35+y=150
y=115
Part C:No , it is not possible because that is a whole 10 minutes more so it would be for 160 minutes of practice instead.
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Suppose you draw two cards from a standard 52-card deck. Find the probability, when both cards are drawn without replacement, that the first card is a spade and the second card has a different suit.
A history teacher gives a 19-question true-false exam. In how many ways can the test be answered if the possible answers are T or F or possibly to leave the answer blank?
38 because there are 2 choices true or false so if there are 19 questions each question would have 2 choices and if selected both same with all the other ones if there are 19 questions each and 2 choices for each question then multiply it by 19*2 and you get 38. Simple!
Solve a=2b - c for b.
Answer:
answer is (a+c)/2 don't add parentheses for the answer
Step-by-step explanation:
8' 10" − 4' 11" =
Please Give Me the answer
Answer:
3 feet 11 inches
Step-by-step explanation:
Answer:
ok is that supposed to be on top of the number because if so it is 8'10-4'11=
Step-by-step explanation:
1069547520 but I am not sure if that could be the slightest bit correct you could try it thought :D
Consider the function and its inverse: The slope, a, of the inverse function is , and the x-intercept of the inverse function is at x = .
Answer:
The slope, a, of the inverse function is 3 , and the x-intercept of the inverse function is at x = -2
Step-by-step explanation:
How many minutes does it take the snail to get 9 inches from the rock
it will take about 3 hours to get across the rock
3.05 is greater than or less than 3.024
Answer:
3.024 is greater.
Step-by-step explanation:
3.05 is greater because it expanded is 3.050 vs. 3.024. 3.024 is closer to 1, so it's greater.
PLease help me quickly
Answer:
3rd option
Step-by-step explanation:
y =3cos (2x-1) +0,3
amplitude
Answer:
Y
=
3
cos
(
2
x
-
1
)
Use the form
to
cos
(
b
x
-
c
)
+
d
to find the variables used to find the amplitude, period, phase shift, and vertical shift.
to
=
3
b
=
2
c
=
1
d
=
0
Find the amplitude
|
to
|
.
Amplitude:
3
Find the period using the formula
2
π
|
b
|
.
Tap for more steps ...
Period:
π
Find the phase shift using the formula
c
b
.
Tap for more steps ...
Phase shift:
1
2
Find the vertical displacement
d
.
Vertical displacement:
0
List the properties of trigonometric functions.
Amplitude:
3
Period:
π
Phase shift:
1
2
(
1
2
on the right)
Vertical displacement:
0
Select some points on the graph.
Tap for more steps ...
x
F
(
x
)
1
2
3
π
4
+
1
2
0
π
2
+
1
2
-
3
3
π
4
+
1
2
0
π
+
1
2
3
The trigonometric function can be drawn using the amplitude, period, phase shift, vertical shift, and the points.
Amplitude:
3
Period:
π
Phase shift:
1
2
(
1
2
on the right)
Vertical displacement:
0
x
F
(
x
)
1
2
3
π
4
+
1
2
0
π
2
+
1
2
-
3
3
π
4
+
1
2
0
π
+
1
2
3Y
=
3
cos
(
2
x
-
1
)
Use the form
to
cos
(
b
x
-
c
)
+
d
to find the variables used to find the amplitude, period, phase shift, and vertical shift.
to
=
3
b
=
2
c
=
1
d
=
0
Find the amplitude
|
to
|
.
Amplitude:
3
Find the period using the formula
2
π
|
b
|
.
Tap for more steps ...
Period:
π
Find the phase shift using the formula
c
b
.
Tap for more steps ...
Phase shift:
1
2
Find the vertical displacement
d
.
Vertical displacement:
0
List the properties of trigonometric functions.
Amplitude:
3
Period:
π
Phase shift:
1
2
(
1
2
on the right)
Vertical displacement:
0
Select some points on the graph.
Tap for more steps ...
x
F
(
x
)
1
2
3
π
4
+
1
2
0
π
2
+
1
2
-
3
3
π
4
+
1
2
0
π
+
1
2
3
The trigonometric function can be drawn using the amplitude, period, phase shift, vertical shift, and the points.
Amplitude:
3
Period:
π
Phase shift:
1
2
(
1
2
on the right)
Vertical displacement:
0
x
F
(
x
)
1
2
3
π
4
+
1
2
0
π
2
+
1
+
1
2
0
π
+
1
2
3
One thermos of hot chocolate uses 2 cup of cocoa powder.
How many thermoses can Nelli make with 3 cups of cocoa
powder?
Answer:
he can make 1 and 1/2 cups
Step-by-step explanation:
Answer:
2 I think I hope it is right?
A __________ is a claim or assertion either about one or more population or process characteristics (parameters) or else about the form of the population or process distribution.
Answer:
statistical hypothesis.
Step-by-step explanation:
A statistical hypothesis has the central objective of assisting in a decision-making process about one or more populations in relation to the sample data, allowing the observance of whether the information found in the samples will support the statistical hypothesis.
It is necessary to know concepts of mathematical probability to perform the tests, the most used models for this purpose are the fisher method, by Neyman-Pearson and Bayes.
The variables used in a statistical hypothesis are: the Null Hypothesis, the one that is assumed to be the true one, the Alternative Hypothesis, the one that is used when there is no statistic to analyze the hypothesis given as true, the Type I Error, related to the probability of rejection of the null hypothesis, and the Type II Error, which is the probability of rejection of the alternative hypothesis if it is true.
12×7=84,84 is a ____ of 12 and 7
Jon measured the length of the 6th grade hall and found it was 7,000cm. Amy suggested that meters would be more appropriate unit, and recorded the length of the hall as_____m.
Answer:
210
Step-by-step explanation:
what is the slope of a line that passes through (2,-5) and (6,-2)
Answer:
[tex]\frac{3}{4}[/tex]
Step-by-step explanation:
You plug in the points in this equation [tex]\frac{y2-y1}{x2-x1}[/tex]
So [tex]\frac{-2-(-5)}{6-2}[/tex] = [tex]\frac{3}{4}[/tex]
PLEASE HELP! I WILL GIVE BRAINLIEST AND 100 POINTS! FIVE QUESTIONS!
1. A newborn giraffe weighs about 65 kilograms. How much does it weigh in grams?w
2. The average height of a female giraffe is 4.6 meters. What is her height in centimeters?
3. The capacity of a beaker is 0.1 liter. Convert this to milliliters.
4. A pig weighs 9.8 pounds. Convert the pig’s weight to ounces.
5. A marker is 0.13 meters long. What is the length in millimeters?
Answer:
65000 g 460 cm100 ml156.8 ounces130 mmStep-by-step explanation:
1. A newborn giraffe weighs about 65 kilograms. How much does it weigh in grams?
65 kg = 65*1000 g = 65000 g2. The average height of a female giraffe is 4.6 meters. What is her height in centimeters?
4.6 m = 4.6*100 cm = 460 cm3. The capacity of a beaker is 0.1 liter. Convert this to milliliters.
0.1 l = 0.1*1000 ml = 100 ml4. A pig weighs 9.8 pounds. Convert the pig’s weight to ounces.
9.8 pounds = 9.8*16 ounces = 156.8 ounces5. A marker is 0.13 meters long. What is the length in millimeters?
0.13 m = 0.13*1000 mm = 130 mmAt a local department store, skirts typically cost $15. However, due to a special, the
skirts are reduced to $3. What percent of the original price has the skirts been reduced
to?
Answer: 20%
Step-by-step explanation:
(part / whole) * 100
(3 / 15) * 100 = 20%
The skirts have been reduced to 20% of their original price.
You are looking for the percentage of the original price that the new price is. This means that you are looking for what percentage of $15 that $3 is:
= New price / Original price x 100%
= 3 / 15 x 100%
= 1/5 x 100%
= 20%
The skirts have therefore been reduced to 20% of their original price.
Find out more at https://brainly.com/question/2984072.
Helppppp quickkkk i need this to pass pleaseee
Answer: A The mean would increase
Step-by-step explanation:
If the smallest numebr dropped, then the numebr would get increased, since there is no more smallest, and the new smallest is $9.25.
what is 100-402-05-340-03-50-405-30-40-304=304=-503=5034x
find X
Answer:
Bruh watashi wa sudeni sore ga totemo tanjunda to omoimasu! !
A right rectangular prism is packed with cubes of side length inch. If the prism is packed with 12 cubes along the length, 8 cubes along the width, and 5 cubes along the height, what is the volume of the prism?
1)
cubic inches
2)
cubic inches
3)
cubic inches
4)
cubic inches
Answer:
480 is the correct answer
Step-by-step explanation:
All you have to do is multiply all together.
May I have brainliest?
Convert F2 from hexadecimal to binary.
Question:
"Convert F2 from hexadecimal to binary."
Answer:
11110010
Step-by-step explanation:
Hex F2 to decimal explained:
The value of HEX F2 in decimal is 242.
The value of HEX F2 in binary is 11110010.
2 2 X 160 = 2
F 15 X 161 = 240
HEX F2 = 242
The binary value is: 11110010
A hexadecimal number has base 16 (0,1,2,3,4,5,6,7,8,9 A,B,C,D,E,F).
basic hex to a decimal conversion table
Hex 0 1 2 3 4 5 6 7 8 9 A B C D E F
Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
HOPE THIS HELPS!
PLEASE MARK BRAINLIEST IF THIS HELPED YOU LEARN! :)
add the two numbers. express you answer in scientific notation. (3.700 x 109)
Answer:
4.397 * 10⁹
Step-by-step explanation:
(3.700 * 10⁹) + (6.970 * 10⁸) = (3.700 * 10 * 10⁸ ) + (6.970 * 10⁸)
= (37.00 * 10⁸) + (6.970 * 10⁸)
= (37.00 + 6.970) * 10⁸
= 43.97 * 10⁸
= 4.397 * 10 * 10⁸
= 4.397 * 10⁽¹⁺⁸⁾
= 4.397 * 10⁹
Answer:
The answer is A
Step-by-step explanation:
Which of the following functions have y-axis symmetry?
a y=x^2,y= |x|, y= cos(x)
b y=sinx, y = cos x, y = x, y = x^3
c. y=x, y=x^3, y=1/x, y=cos x
d. y=1/x, y=sin x, y=x^2
The plot of a function f(x) is symmetric across the y-axis if it is even, meaning f(-x) = f(x) for all x in the function's domain.
The answer is then A because
(-x)² = (-1)² x² = x²
|-x| = |-1| |x| = |x|
cos(-x) = cos(x)
The answer is not
• B because sin(-x) = -sin(x) and (-x)³ = (-1)³ x³ = -x³
• C because -x ≠ x and again because of x³
• D because 1/(-x) = -1/x and again because of sin(x)
List the possible rational zeros for each function.
1. f(x)= 2x^3 - 3x^2 + 4x - 18
2. f(x) = x^4 - 3x^2 + 2x + 24
Find the zeros of each function
3. f(x)= 2x^3 + 2x^2 - 8x -8
4. f(x)= x^3 + x^2 - 10x + 8
9514 1404 393
Answer:
{±1/2, ±1, ±3/2, ±2, ±3, ±9/2, ±6, ±9, ±18}{±1, ±2, ±3, ±4, ±6, ±8, ±12 ±24}-2, -1, 2-4, 1, 2Step-by-step explanation:
Possible rational zeros are of the form ...
±{divisor of the constant term}/{divisor of the leading coefficient}
__
1. Rational zeros will be one of ±{1, 2, 3, 6, 9, 18}/{1, 2}, so will be ...
{±1/2, ±1, ±3/2, ±2, ±3, ±9/2, ±6, ±9, ±18}
__
2. Rational zeros will be one of {±1, ±2, ±3, ±4, ±6, ±8, ±12 ±24}.
__
3. The pairs of coefficients suggest factoring by pairs:
f(x) = (2x^3 +2x^2) -(8x +8) = 2x^2(x +1) -8(x +1) = 2(x^2 -4)(x +1)
f(x) = 2(x -2)(x +2)(x +1)
Zeros of f(x) are 2, -2, -1, values of x that make the factors zero.
__
4. The sum of coefficients is zero, so x=1 is a zero. Factoring that out by any of several means, you find ...
f(x) = (x -1)(x^2 +2x -8)
The quadratic is factored by looking for factors of -8 that have a sum of 2. (4 and -2 are those)
f(x) = (x -1)(x +4)(x -2)
Zeros of f(x) are 1, -4, 2.
_____
The attached graph confirms our factoring of the polynomials of questions 3 and 4. For cubic and higher degree, I find a graphing calculator to be quite helpful finding zeros.
Answer:
f(x)= 2x^3 + 2x^2 - 8x -8
4. f(x)= x^3 + x^2 - 10x + 8
Please help this is confusing
Answer
two is the answer
Solve the following system of equations
x=-y-9
5x-6y=-1
Answer:
x=y-9....1
5x-6y=-1.....2
putting the value of x in eqn 2
5y-45-6y=-1
-y=44
y=44
Juniper drives at a constant speed on the highway towards Exit 34. The graph below shows the distance, in miles, that Juniper is from Exit 34 over time.
——————————
The slope of the graph is
60.
The y-intercept gives the initial distance, in miles, from Exit 34.
The y-intercept of the graph is
3.5.
The slope gives the rate, in miles per hour, at which the distance to Exit 34 changes over time.
Answer:
Options (2) and (4)
Step-by-step explanation:
Option (1)
The slope of the graph is 60.
From the graph attached,
Slope = [tex]\frac{\text{Rise}}{\text{Run}}[/tex]
= [tex]\frac{-210}{3.5}[/tex]
= - 60
False.
Option (2)
y-intercept gives the initial distance, in miles from Exit 34.
True.
Option (3)
y-intercept of the graph is 3.5
Since, y-intercept of the graph is 210.
Therefore, Option (3) is False.
Option (4)
Slope gives the rate, in miles per hour, at which the distance to Exit 34 changes over time.
True.
Plzz help me with dis
everything is on the image below
I'll do these in order
1.
A. -2
B. -4
C. y=-2x-4
2.
A. +6
B. 0
C.y=6x
Homework: 5.1 Systems of Linear Equations
core: 0 of 1 pt
1 of 9 (5 complete)
5.1.19
Solve by the elimination
method.
7x - y = 51
x + 3y = 23
The solution set is
(Simplify your answer. Type an ordered
Answer:
[tex]\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}[/tex]
[tex]x=8,\:y=5[/tex]
Step-by-step explanation:
Given the system of linear equations
[tex]7x-y=51[/tex]
[tex]x+3y=23[/tex]
solving by the elimination method
[tex]\begin{bmatrix}7x-y=51\\ x+3y=23\end{bmatrix}[/tex]
[tex]\mathrm{Multiply\:}x+3y=23\mathrm{\:by\:}7\:\mathrm{:}\:\quad \:7x+21y=161[/tex]
[tex]\begin{bmatrix}7x-y=51\\ 7x+21y=161\end{bmatrix}[/tex]
[tex]7x+21y=161[/tex]
[tex]-[/tex]
[tex]\underline{7x-y=51}[/tex]
[tex]22y=110[/tex]
so
[tex]\begin{bmatrix}7x-y=51\\ 22y=110\end{bmatrix}[/tex]
now solving for y
[tex]22y=110[/tex]
[tex]\mathrm{Divide\:both\:sides\:by\:}22[/tex]
[tex]\frac{22y}{22}=\frac{110}{22}[/tex]
[tex]y=5[/tex]
[tex]\mathrm{For\:}7x-y=51\mathrm{\:plug\:in\:}y=5[/tex]
[tex]7x-y=51[/tex]
[tex]7x-5=5[/tex]
[tex]7x=56[/tex]
[tex]\mathrm{Divide\:both\:sides\:by\:}7[/tex]
[tex]\frac{7x}{7}=\frac{56}{7}[/tex]
[tex]x=8[/tex]
[tex]\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}[/tex]
[tex]x=8,\:y=5[/tex]