I'm really confused about this. Probabilities have always been a pain for me and I really don't understand this
Answers
Answer:
A
Step-by-step explanation:
The first thing to notice is the question says it is given that the person is between the ages 23 and 60, so we only care about those people. So then we want to know how likely it would be to pick someone with over 50 messages a month. So what you would do is take the amount of people who are between 23 and 60 and send over 50 text messages, and divide that by the total amount of people 23-60 (since that is the pool of people we have). Doing so we find there is 229 people aged 23-60 which then makes the answer 157/229 or A.
Related Questions
PLZZZ HELLP 3+7 − 1/2 is an example of
A. a numerical equation
B. an algebraic equation
C. a numerical expression
D. an algebraic expression
Answers
Answer:
C. a numerical expression.
Step-by-step explanation:
Right away, what you should know is that this is an expression. Equations are expressions, except wiht an equal sign. This is not algabraeic though, since there is no valuable (for example 3x, or 7a). So, through the process of elimination, the answer would be a numerical expression.
Hope this helps!
Solve each equation. 1. 5/2 × X=1 2. X × 7/3=1 3. 1 ÷ 11/2=X
Answers
Answer:
1: x = 2/5
2: x = 3/7
3: x = 1/22
In ΔRST, the measure of ∠T=90°, the measure of ∠S=21°, and ST = 7.7 feet. Find the length of TR to the nearest tenth of a foot.
Answers
Answer:
TR = 3 ft
Step-by-step explanation:
tan x = [tex]\frac{o}{a}[/tex]tan (21) = [tex]\frac{o}{7.7}[/tex]7.7( tan 21) = o2.9 = oround up and you get;3.0=owhat is standard form of 42/-10
Answers
Answer:
-4.2
Step-by-step explanation:
Taking the expression at face value, it is ...
42/-10 = -42/10 = -4.2
_____
Comment on "standard form"
In the US, a number is in standard form if it is written as a sequence of decimal digits and a decimal point (if there is a fractional part), usually with no leading zeros (left of the decimal point). The sign is prepended to that digit string, as shown above.
In the UK, a number is in standard form if it is written in "scientific notation." The rule for writing a number in standard form is that first you write down a number between 1 and 10, then you write ×10(to the power of an integer). Usually powers of 0, or multipliers of 1, are not written. Then the number here is still -4.2, rather than -4.2×10⁰.
Question attached pls answer
Answers
Answer:
A=4686 M2
Step-by-step explanation:
A=H[B+A]/2
A=102+140
A=66 X 142 / 2
A=33 X 142
A=4686 M2
Evaluate. Show all work
51-(21-5)x2
Answers
Answer:
19
Step-by-step explanation:
51-(16)x2
16x2=32
51-32=19
Step-by-step explanation:
B bracket
O of
D division
M multiplication
A addition
S subtraction
therefore 51-32 is equal to 49
R 0,-180
is the same rotation as
R
90, 180
R 0,180
OR-90,180
R 0,90
Answers
90,180 is the same as R so it is
if I'm 2 lessons into a class and my progress bar says that I am 1/3 of the way complete. How many lessons are in the class?
Answers
Answer:
Well you have 6 lessons in total.
Step-by-step explanation:
if you finished 2 lessons you are 1/3
It is basically the same as 2/6 lessons
so
2/6 = 1/3
You have 6 lessons
Answer:
6
Step-by-step explanation:
what is (- 2) to the 4 power in expanded form and standard form what is (- 7) to the 2nd power in expanded form and standard form
Answers
Answer:
(-2)^4 = (-2) * (-2) * (-2) * (-2) = 16
↑expanded ↑standard
(-7)² = (-7) * (-7) = 49
Solve for r.
–16r + 15 + 17 = 7(–3r + 16) − 5r
r =
Answers
Answer:
r = 8
Step-by-step explanation:
→Distribute the 7 to (-3r + 16):
-16r + 15 + 17 = 7(-3r + 16) - 5r
-16r + 15 + 17 = -21r + 112 - 5r
→Add like terms:
-16r + 32 = -26r + 112
→Add 26r to both sides:
10r + 32 = 112
→Subtract 32 from both sides:
10r = 80
→Divide both sides by 10:
r = 8
Answer:
Step-by-step explanation:
-16r +15+17= 7(-3r+16)-5r
-16r+32 = -21r +112-5r
-16r +26r=112-32
10r =80
r=80/10
r=8
mark me as the brainliest and hope it helps you..
Which expression is equivalent to 64 – 9x^2?
A(32)^2 – (3x)^2
B(32)^2 + (-3x)2
C(8)^2 – (3x)^2
D(8)^2 + (-3x)^2
Answers
Answer:
Option C is correct
Step-by-step explanation:
A = 64 - 9x^2
= 8^2 - (3^2)(x^2)
= 8^2 - (3x)^2
Hope this helps!
In Mathematics is 5n a monomial?
Answers
Answer:
yes
Step-by-step explanation:
because monomials can be numbers variables and numbers together with variables
Answer:
5n should be a monomial i think
Step-by-step explanation:
Approximately how many times as large were Ronald Christian's 2014 20142014 earnings as Forest Thorton's? Athlete 2014 20142014 earnings (in dollars) Ronald Christian 92 , 000 , 000 92,000,00092, comma, 000, comma, 000 James Leon 20 , 300 , 000 20,300,00020, comma, 300, comma, 000 Mason Payton 15 , 700 , 000 15,700,00015, comma, 700, comma, 000 Ryan Nader 14 , 800 , 000 14,800,00014, comma, 800, comma, 000 Forest Thorton 30 , 000
Answers
Answer:3*10^3
Step-by-step explanation:
Evalúa 13-0{,}75w+8x13−0,75w+8x13, minus, 0, comma, 75, w, plus, 8, x cuando w=12w=12w, equals, 12 y x=\dfrac12x= 2 1 x, equals, start fraction, 1, divided by, 2, end fraction.
Answers
Answer:
[tex]13- 0.75 * (12) + 8 * (\frac{1}{2} ) = 13-9+4\\\\13-5=8[/tex]
Therefore, the result after evaluating the expression is: 8Step-by-step explanation:
Evaluate 13-0.75w+8x13−0.75w+8x13, minus, 0, point, 75, w, plus, 8, x when w=12w=12w, equals, 12 and x=\dfrac12x= 2 1 x, equals, start fraction, 1, divided by, 2, end fraction.
For this case we have the following expression:
[tex]13-0.75w + 8x[/tex]
Evaluate for the following values:
w = 12
x = 1/2
We Substituting the values we have:
[tex]13- 0.75 * (12) + 8 * (\frac{1}{2} ) = 13-9+4\\\\13-5=8[/tex]
Therefore, the result after evaluating the expression is: 8What is the value of a
Answers
Answer: Multiplying 3x and -x we obtain A= -3x^2
20/4 = X/18 What is X
Answers
Answer: 90
Step-by-step explanation: Divide 20 by 4 and Multiply the 18
5=X/8
X=5x8
X=40
a car travels at 54 km/h for first 20seconds , 36km/h for next 30seconds and finally 18km/h for next 10 seconds find the averade velocity
Answers
Answer:
39 km/h
Step-by-step explanation:
Velocity is the rate of change of distance in a given direction with time. Mathematically,
Velocity = Displacement/time
Like speed, velocity is measured in Km/h or m/s.
Given that the car travels at 54 km/h for first 20seconds,
since 60 seconds = 1 minute and
60 minutes = 1 h,
20 seconds
= 20/(60 ×60) h
= 1/180 h
In the same vein,
30 seconds
= 30 / (60 ×60) h
= 1/120 h
10 seconds
= 10/(60 ×60) h
= 1/360 h
Hence if the car travels 54 km/h for 10 seconds, the distance covered
= 54 × 1/180
= 3/10 Km
If the car travels 36km/h for next 30seconds, the distance covered
= 36 × 1/120
= 3/10 Km
If the car travels 18km/h for next 10 seconds, the distance covered
= 18 × 1/360
= 1/20 km
Total distance = 3/10 Km + 3/10 Km + 1/20 Km
= 13/20 Km
Total time spent = 20 + 30 + 10
= 60 seconds
= 1/60 h
Average velocity = 13/20 km/ 1/60 h
= 39 Km/h
Please answer correctly !!!! Will mark brainliest !!!!!!!
Answers
Answer:
Width=x+4
Step-by-step explanation:
(X+4)(x+9)=x^2+13x+36
The school bought 130.5 pounds
of peanuts to sell at the carnival.
There were 0.375 pounds left over.
How many pounds of peanuts were sold?
Answers
Answer:
130.125
Step-by-step explanation:
A swimming pool is being drained at a constant rate of 3 inches (depth of the water) per hour. The depth of the water after 5 hours is 32 inches. Write the equation for this function in point slope form.
Answers
Answer:
y-32=3(x-5)
Step-by-step explanation:
The swimming pool is being drained at a constant rate of 3 inches per hour, therefore:
The rate of change, Slope, m=3 inches per hourIf the depth of the water after 5 hours is 32 inches.
The depth is the dependent variable(as its values varies with time) while the time is the independent variable, we can write this as a pair (x,y)=(5, 32).
The point slope form of the equation of a line is of the form: [tex]y-y_1=m(x-x_1)\\(x_1,y_1)=(5,32), m=3\\$Substituting these values, we obtain:\\y-32=3(x-5)\\This is the equation of the function in point slope form.[/tex]
A rectangle has sides of 4 and 6 units. Which expression could you use to find the volume (in
cubic units) of the three-dimensional object formed by continuously rotating the rectangle about
the shorter side?
Answers
Answer:
144π
Step-by-step explanation:
If the rectangle below is continuously rotated about side, the solid figure formed is a cylinder.
A rectangle with sides of 4 and 6 unit continuously rotated about the shorter side gives a cylinder with a radius (r) of 6 units and a height (h) of 4 units. The volume of a cylinder is given by:
Volume = πr²h
Volume = π × 6² × 4 = 144π
The volume of the cylinder formed is 144π
The table represents a function,
X F(x)
-6 3
-2 1
0 4
3 -2
what is f(-2)?
A) -3
B)-1
C)1
D)3
Answers
Answer:
c
Step-by-step explanation:
the answer is c. because it is the corresponding value to minus two
Find the area of the square below. Each unit on the grid represents one unit. Make sure you show your work and/or explain how you solved it.
Answers
Answer:
Area of the rectangle A = 17 units²
Step-by-step explanation:
Area of the rectangle A = Area of rectangle ACEG - (Area of the triangle ABH + Area of triangle BCD + Area of triangle DEF + Area of the triangle FGH )
Area of rectangle ACEG = Length × Width
= (5 units) × (5 units)
= 25 square units
Area of the triangle ABH = [tex]\frac{1}{2}(\text{Base})(\text{Height})[/tex]
= [tex]\frac{1}{2}(4)(1)[/tex]
= 2 units²
Area of the triangle BCD = [tex]\frac{1}{2}(\text{Base})(\text{Height})[/tex]
= [tex]\frac{1}{2}(1)(4)[/tex]
= 2 units²
Similarly, area of the triangle DEF = 2 units²
And area of the triangle FGH = 2 units²
Now area of the rectangle A = 25 - (2 + 2 + 2 + 2)
= 25 - 8
= 17 square units
Therefore, area of the rectangle A = 17 square units
Michael is using a number line to evaluate the expression –8 – 3.
Answers
Answer:
-11
Step-by-step explanation:
-8 - 3 = -11
Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!
Answers
Answer:
c
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
m(x) = 2(x + 4)² - 8 ← is in vertex form
with vertex = (- 4, - 8 ) → A
Subtract.
Your answer should be a polynomial in standard form.
(5p^3 - p) – (7p^2 + 4p - 3)
Answers
Answer:
5p³ - 7p² -5p + 3
Step-by-step explanation:
Combine like terms
5p³ - 7p² -5p + 3
Answer:
5p^3-7p^2-5p+3
Step-by-step explanation:
(5p^3 - p) – (7p^2 + 4p - 3)
Distribute the minus sign
(5p^3 - p) – 7p^2 - 4p + 3
Combine like terms
5p^3-7p^2-5p+3
Which ordered pair is generated from the equation shown below? y = 3x -2 A. (3, 9) B. (3, 7) C. (1, 3) D. (3, 1)
Answers
Answer:
B
Step-by-step explanation:
7 = 3*3 -2
7 = 9 -2
7 = 7
This is the only point that works.
Answer:
B
Step-by-step explanation:
Given n(t) = -2(t+5)2 +4, find n(-8).
Answers
Answer:
n(-8)=16 is the answer
What is the formula for the area A of a circle in terms of the radius r?
Answers
Answer:
A=pi r^2for example:
r=2 cm
Area=pi r^2
=3.14*(2)^2
=3.14*4
=12.56
hope it helps
Good luck on your assignment
Which ordered pair is generated from the equation shown below? y = 2x + 4 A. (1, 6) B. (1, 2) C. (3, 6) D. (8, 16)
Answers
Answer:
The ordered pair generated from the equation is (1, 6).
Step-by-step explanation:
An ordered pair is a pair of numbers, representing two variables, in a specific order. For instance, (x, y) = (1, 2) here x = 1 and y = 2.
The equation provided is:
[tex]y=2x+4[/tex]
Check for all the options:
A (1, 6): [tex]y=2x+4\Rightarrow\ 6=(2\times 1) +4\Rightarrow\ 6=6[/tex] B (1, 2): [tex]y=2x+4\Rightarrow\ 2=(2\times 1) +4\Rightarrow\ 2\neq 6[/tex] C (3, 6): [tex]y=2x+4\Rightarrow\ 6=(2\times 3) +4\Rightarrow\ 6\neq10[/tex] D (8, 16): [tex]y=2x+4\Rightarrow\ 16=(2\times 8) +4\Rightarrow\ 16\neq20[/tex]Thus, the ordered pair generated from the equation is (1, 6).
Answer:
(1,6)
Step-by-step explanation: