Taking any number x, and adding on its opposite -x, leads to x+(-x) = x-x = 0
This is the inverse property of addition.
A numeric example would be 7 + (-7) = 7-7 = 0
Going back to x-x = 0, we can replace x with any expression (whether simple or complicated) we want.
So in this case, we replace each 'x' with 'x+3' to get (x+3)-(x+3) = 0
The equation (x+3)-(x+3) = 0 has infinitely many solutions. The solution set is the set of all real numbers. We can replace x with any number and the original equation will simplify to a true statement.
William drove 344 miles in 8 hours. If he continued at the same rate, how far would he travel in 17 hours?
Answer:
731 miles
Step-by-step explanation:
To solve this, we can set up a proportion.
Let's name the number of miles he travels in 17 hours x for now.
8/344=17/x
Simplify 8/344
2/86=17/x
Cross multiply
86*17=2*x
2x=1462
Divide both sides by 2.
x=731
He would travel 731 miles in 17 hours.
Answer:
731 miles
Step-by-step explanation:
Proportions:
344 miles ⇒ 8 hours
W miles ⇒ 17 hours
W = 344*17/8
W = 731
A computers is on on sale for $1085. if the original price was reduced by 30%, what was the original price of the Computer ?
Answer:
1.131,5
Step-by-step explanation:
which of the following is not a factor in becoming a money smart?
Answer:
Its learning how to read credit card statements
Step-by-step explanation:
Learn how to read your credit card statements and control the way you process them
can someone please help me???
a is 3/4
b is -8
c is -2
d is 3
Answer:
-b[a + (c-d)^2]
-(-8)[3/4 + (-2 -3)^2]
8 [3/4 + (-5)^2]
8 [3/4 + 25]
8 [25.75]
206
=======================================
Work Shown:
a = 3/4
b = -8
c = -2
d = 3
----------------
c-d = -2-3 = -5
(c-d)^2 = (-5)^2 = 25
a+(c-d)^2 = 3/4 + 25 = 3/4 + 100/4 = 103/4
-b * [ a + (c-d)^2 ] = -(-8)*103/4 = 8*103/4 = (8/4)*103 = 2*103 = 206
----------------
Another way to show the steps could be
[tex]-b[a+(c-d)^2]\\\\-(-8)\left[\frac{3}{4}+(-2-3)^2\right]\\\\8\left[\frac{3}{4}+(-5)^2\right]\\\\8\left(\frac{3}{4}+25\right)\\\\8\left(\frac{3}{4}+\frac{100}{4}\right)\\\\8\left(\frac{3+100}{4}\right)\\\\8\left(\frac{103}{4}\right)\\\\\frac{8}{4}*103\\\\2*103\\\\206\\\\[/tex]
Which is more or less the same thing as the previous section.
----------------
So ultimately,
[tex]-b[a+(c-d)^2] = 206[/tex]
when a = 3/4, b = -8, c = -2, and d = 3.
How do I graph this? Also how do identify which values of c for which
lim f(x) exist?
x -> c
Answer:
Step-by-step explanation:
Hello, I attached the graph.
This is a parabola, then a line and finally an horizontal line.
The vertex of the parabola is (0,0) and (2,4) is on the graph.
For the second part, draw a line which is passing by (2,4) and (0,4)
Finally, draw the line y = 4
You can see that f is continuous everywhere except in x = 4.
So, for any c real different from 4 the limit of f(x) exists.
Thank you
6. Which expressions are equivalent to 9x?
Select all that apply.
A. 8x + x
B. 9x + x
C. 10 - X
D. 5x + x + 3x
E. 7x + x + 2x
Answer:
A. & D.
Step-by-step explanation:
A. 8x + x = 9x
B. 9x + x = 10x
C. 10 - x = 10 - x (not like terms)
D. 5x + x + 3x = 9x
E. 7x + x + 2x = 10x
What happens when we add a negative number to another number?
Answer:
When you are adding a negative number to a negative number, it becomes subtraction, where you start from a negative point on the numbers line and move left.
Step-by-step explanation:
Answer:
when you add a negative number with a other number it gives you a positive number.
Step-by-step explanation:
If f(x) = -1x + 4 then what is f(-2)?
Answer:
[tex]\huge \boxed{f(-2)=6}[/tex]
Step-by-step explanation:
[tex]\sf f(x)=-1x+4[/tex]
Switching x variable with -2.
[tex]\sf f(-2)=-1(-2)+4[/tex]
Evaluating.
[tex]\sf f(-2)=2+4[/tex]
[tex]\sf f(-2)=6[/tex]
Answer:
6Step-by-step explanation:
[tex]f(x) = -1x + 4\\\\f(-2) =?\\\\f(-2) = -1(-2) +4\\f(-2) = 2+4\\f(-2) = 6[/tex]
Calculate the expected value E(X) of the given random variable X.
Forty-five darts are thrown at a dartboard. The probability of hitting a bull's-eye is .2. Let X be the number of bull's-eyes hit.
E(X) = _________
Answer:
E(X) = 9.
Step-by-step explanation:
That is 45 * (0.2) = 9.
The required expected value is given as 9 as per the given conditions.
Given that,
To Calculate the expected value E(X) of the given random variable X. Forty-five darts are thrown at a dartboard. The probability of hitting a bull's eye is .2. Let X be the number of bull's-eyes hit.
What is probability?Probability can be defined as the ratio of favorable outcomes to the total number of events.
Here,
The expected value is the scenario predicting algorithm in maths that gives the prediction a value.
So,
According to the question,
E(x) = 0.2 × 45 = 9
Thus, the required expected value is given as 9 as per the given conditions.
Learn more about probability here:
brainly.com/question/14290572
#SPJ5
PLEASE HELP ASAP it is ze homework
Answer:
Figure d)
Monopars are figures that have just one set of parallel lines.
Step-by-step explanation:
It looks like all the figures in group 1 have one set of parallel lines. In group 2, they either have 0 or 2. In group 3, only d has just one set of parallel lines.
So monopars are figures that have just one set of parallel lines.
Solve the quadratic equation. 2(x−3)2−24=0
Answer: 12
Step-by-step explanation:
2x-6+2-24=0
2x-4-24=0
2x-24=0
+24 +24
2x/24
X=12
Answer:
Step-by-step explanation:
2(x-3)+2-24=0
2x-6+2-24=0
2x-28=0
x-14=0
x=14
I don't think was a quadratic, but correct me if I was wrong because the wording of the problem threw me off a bit. Hope it helped!
Mrs. diaz has 9 eggs. she cooks 5 eggs for breakfast. how many eggs are left? which model shows the problem?
Answer:
4
Step-by-step explanation:
9-4=5
hold up 9 fingers and take down 5
Convert 0.00001 to a power of 10
Answer:
1 * 10 ^ -7
Step-by-step explanation:
Find the perimeter of a triangle with sides of 1/12 meter 5/12 meter and 11/12 meter write your answer as a mixed number
Answer:
The answer is 1 5/12.Step-by-step explanation:
Side 1 = 1/12
Side 2 = 5/12
Side 3 = 11/12
Side 1 + Side 2 + Side 3 = P
1/12 + 5/12 + 11/12 = 6/12 + 11/12 = 17/12
The answer is 1 5/12.One millilitre has about 15 drops. One drop of
water has 1.67 x 1021 H,O (water) molecules.
Estimate the number of molecules in 1 litre of
water. Write down your answer in standard
form.
Answer:
25,576,050 water molecules
Step-by-step explanation:
multiply 1.67 by 1021 = 1705.07
multiply 1705.07 by 15 = 25,576.05
Now multiply 25,576.05 by 1000 (thats how many milliliters are in 1 liter) = 25,576,050
The number of water molecules is 2.505 x 10²⁵.
What is an expression?Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Given that one milliliter has about 15 drops. One drop of water has 1.67 x 10²¹ H, O (water) molecules.
Multiply 1.67 by 10²¹ = 1.67 x 10²¹
Multiply 1.67 x 10²¹ by 15 = 2.505 x 10²²
Now multiply 2.505 x 10²² by 1000 (that's how many mill liters are in 1 liter) 2.505 x 10²⁵.
Therefore, the number of water molecules is 2.505 x 10²⁵.
To know more about an expression follow
https://brainly.com/question/14106327
#SPJ2
last math hw question
Answer:
(a) -5, 4
(b) no solution
Step-by-step explanation:
(a) x+5 will be zero when x = -5.
x-4 will be zero when x = 4.
The restricted values are: x = -5 and x = 4.
__
(b) We can simplify the difference of the two sides of the equation.
[tex]\dfrac{4}{x+5}+\dfrac{5}{x-4}=\dfrac{45}{(x+5)(x-4)}\\\\\dfrac{4(x-4)+5(x+5)}{(x+5)(x-4)}=\dfrac{45}{(x+5)(x-4)}\\\\\dfrac{9x+9}{(x+5)(x-4)}-\dfrac{45}{(x+5)(x-4)}=0\\\\\dfrac{9(x-4)}{(x+5)(x-4)}=0\\\\\dfrac{9}{x+5}=0\qquad\text{NO SOLUTION}[/tex]
__
The graph shows there are no values of x that cause the two sides of the equation to be equal (their difference to be zero).
How does 0.9 relate to 0.09?
Answer: The 0.09 is 1/10 of 0.9
Step-by-step explanation:
You can see by the decimal point that it moved so from 0.9 to 0.09 it has moved once.
Find the estimate and briefly explain your reasoning.
Estimate the cost of painting a homecoming float if the area to be painted is 9 feet
by 16 feet and a quart of paint that covers 53 square feet costs $11.99.
Answer:
$35.97
Step-by-step explanation:
Given:
Dimensions of homecoming float = 9 ft [tex]\times[/tex] 16 ft
Area covered by a quart of paint = 53 sq ft
Cost of a quart of paint = $11.99
To find:
Cost of painting the homecoming float = ?
Solution:
First of all, let us find the area of homecoming float which is to be painted.
Area = Length [tex]\times[/tex] Width = 9 [tex]\times[/tex] 16 = 144 sq ft
Quart needed to cover 53 sq ft = 1
Quart needed to cover 1 sq ft = [tex]\frac{1}{53}[/tex]
Quart needed to cover 144 sq ft = [tex]\frac{1}{53}\times 144 = 2.716 \approx 3[/tex]
So, 3 quarts will be needed.
Cost of 1 quart = $11.99
Cost of 3 quarts = $11.99 [tex]\times[/tex] 3 = $35.97
What are the distances from the point (x,y) to the focus of the parabola and the directrix? Select two answers. A.distance to the directrix: |y+6| B.distance to the focus: (x+4)2+(y−2)2√ C.distance to the directrix: |y−6| D.distance to the focus: (x−2)2+(y+4)2√ E.distance to the directrix: |x+6| F.distance to the focus: (x−2)2+(y+5)2√
Answer:
Option (A) and Option (D)
Step-by-step explanation:
Point on the parabola is (x, y).
Focus given as (2, -4) and directrix of the parabola is y = -6
Therefore, distance of the point from the directrix will be,
d = |(y + 6)|
Similarly, distance of the point (x, y) from the focus will be,
d = [tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
= [tex]\sqrt{(x-2)^2+(y+4)^2}[/tex]
Therefore, Option (A) and Option (D) will be the correct options.
The equation y=3x and y=3x-3 represents what type of lines?
Answer: It represent Parallel lines which means it have no solution which also means they never intersect.
Step-by-step explanation:
y=3x will be going through the origin and y=3x-3 will be going through the y intercept -3.
Since the lines has the same slopes and different y intercept we will have no solutions.
Solve the equations to prove it.
First set them equal each other and solve for x.
3x - 3 = 3x
-3x -3x
-3 ≠ 0
As you can see -3 does not equal 0 so there will be no solution.
The data show systolic and diastolic blood pressure of certain people. Find the regression equation, letting the systolic reading be the independent (x) variable. Find the best predicted diastolic pressure for a person with a systolic reading of 146 . Is the predicted value close to 91.0 , which was the actual diastolicreading? Use a significance level of 0.05.Systolic 117 134 150 113 138 113 144 145Diastolic 85 74 86 55 75 80 106 841. What is the regression equation? (Round to two decimal places as needed.)2. What is the best predicted diastolic pressure for a person with a systolic reading of 146 ?3. Is the predicted value close to 91.0 , which was the actual diastolic reading?A. The predicted value is very close to the actual diastolic reading.B. The predicted value is not close to the actual diastolic reading.C. The predicted value is close to the actual diastolic reading.D. The predicted value is exactly the same as the actual diastolic reading.
Answer:
ŷ = 6.69X - 706.18 ; 270.56; B. The predicted value is not close to the actual diastolic reading.
Step-by-step explanation:
Given the data below :
Systolic reading(x) :
117
134
150
113
138
113
144
145
Diastolic (y) :
85
74
86
55
75
80
106
841
A) Find the regression equation, letting the systolic reading be the independent (x) variable:
Using the online regression calculator :
The regression equation obtained is ;
ŷ = 6.69X - 706.18
Where ;
ŷ = dependent variable
6.69 is the gradient or slope
-706.18 is the intercept, where the line crosses the y - axis.
X - the independent variable (Systolic reading)
B.) Find the best predicted diastolic pressure for a person with a systolic reading of 146 .
ŷ = 6.69X - 706.18
ŷ = 6.69(146) - 706.18
ŷ = 270.56
Is the predicted value close to 91.0
B. The predicted value is not close to the actual diastolic reading.
P = 0.36x – 42
the formula below models the profit p in dollars for a shoe shiner when he shines x pairs of shoes use the formula to find this shoe shiner's profit when he shines 900 pairs of shoes
Answer:
pata nahi
Mark me as a brainliest
Determine whether the variable is qualitative or quantitative. Is the variable qualitative or quantitative? favorite rock group
Answer:
qualitative
Step-by-step explanation:
Favorite rock group is the qualitative variable because it shows an attribute. It does not depict a quantity or numbers. The favorite rock group will perform and show their ability to deliver music articles so it is showing quality not quantity. It is an attribute.
Variable is defined as the characteristic being studied so it is a qualitative variable meaning it is showing quality of the characteristic.
In 2000, the total number of employees working for
U.S. airlines was 679,967. Round this number to the
nearest thousand. (Source: The Air Transport Asso-
ciation of America, Inc.)
Answer:
680,000
679,967 rounded to the nearest thousand is 680,000.
So, there are around 680,000 employees working for US Airlines. Hope it helps!
Answer:
680,000
Step-by-step explanation:
Look at the hundreds place if it's 5 or higher you round up the thousands place by one. Every place to the right of the hundreds place turns into a zero.
Simplify. Answer and explanation if you can
Hi there! Hopefully this helps!
--------------------------------------------------------------------------------------------------
Answer: 6~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Calculate 36 to the power of [tex]\frac{1}{2}[/tex].
[tex]\frac{1}{2} = 0.5[/tex]
[tex]36^{0.5} = 6[/tex].
Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals 550 comma x equals 440 comma 95 % confidence nothingless thanpless than nothing (Round to three decimal places asneeded.)
Answer:
(0.767,0.833)
Step-by-step explanation:
The 95% confidence interval for population proportion p can be computed as
[tex]p-z_{\frac{\alpha }{2} } \sqrt{\frac{pq}{n} } <P<p+z_{\frac{\alpha }{2} } \sqrt{\frac{pq}{n} }[/tex]
The z-value associated with 95% confidence level is 1.96.
whereas p=x/n
We are given that x=440 and n=550.
p=440/550=0.8
[tex]0.8-1.96\sqrt{\frac{0.8(0.2)}{550} } <P<0.8+1.96\sqrt{\frac{0.8(0.2)}{550} }[/tex]
[tex]0.8-1.96\sqrt{\frac{0.16}{550} } <P<0.8+1.96\sqrt{\frac{0.16}{550} }[/tex]
[tex]0.8-1.96\sqrt{0.00029 } <P<0.8+1.96\sqrt{0.00029 }[/tex]
[tex]0.8-1.96(0.01706) <P<0.8+1.96(0.01706)[/tex]
[tex]0.8-0.03343 <P<0.8+0.03343[/tex]
[tex]0.76657 <P<0.83343[/tex]
Thus, the required confidence interval is
0.767<P<0.833 (rounded to 3 decimal places)
Hence, we are 95% confident that our true population proportion will lie in the interval (0.767,0.833)
Un productor agricola tiene que envasar huevos en cajas de 12, de 6 o de 30. Si sabemos que tiene un numero parecido a 1000 huevos, pero no mas que eso, ¿Cuantos huevos tiene que envasar?
Answer:
El productor tiene que envasar 960 huevos.
Step-by-step explanation:
Es necesario determinar el mínimo común múltiplo de 6, 12 y 30. En primer lugar, se determina cada número como productos de números primos:
[tex]6 = 2\times 3[/tex]
[tex]12 = 2^{2}\times 3[/tex]
[tex]30 = 2\times 3\times 5[/tex]
El mínimo común múltiplo es:
[tex]M.C.M. = 2^{2}\times 3\times 5[/tex]
[tex]M.C.M. = 60[/tex]
El número total de huevos próximo a 1000 unidades es un múltiplo del mínimo común múltiplo:
[tex]n = 60\times 16[/tex]
[tex]n = 960[/tex]
El productor tiene que envasar 960 huevos.
I will Mark you brainliest if you explain your work
Answer:
(-1/2, 1)
Step-by-step explanation:
I just used the midpoint formula, and plugged in the points. I hope this helps!
=(x^2+x^1 /2 , y^2+y^1 /2)
=(-2+1 /2 , -5+3 /2)
=(-1/2, 1)
Answer: (-0.5, -1 ) or (-1/2,-1)
Step-by-step explanation:
(-2,-5) (1,3)
To find the midpoint between these two numbers find the average of the x and y coordinates.
-2 + 1 = -1 /2 = -0.5
-5 + 3 = -2/2 = -1
3. Dr. Potter provides vaccinations against polio and measles. Each polio vaccination consists of 5
doses, and each measles vaccination consists of 3 doses. Last year, Dr. Potter gave a total of 60
vaccinations that consisted of a total of 225 doses. How many more measles vaccines did Mr.
Potter give than polio?
Please explain the process. THX
Answer:
There are 15 more measles vaccines than polio vaccines
Step-by-step explanation:
Represent Polio with P and Measles with M
Given
5P + 3M = 225
P + M = 60
Required
How much is M greater than P; M - P
Make M the subject of formula in the second equation
[tex]M = 60 - P[/tex]
Substitute this in the first equation
[tex]5P + 3M = 225[/tex] becomes
[tex]5P + 3(60 - P) = 225[/tex]
Open the bracket
[tex]5P + 180 - 3P = 225[/tex]
Collect Like Terms
[tex]5P - 3P = 225 - 180[/tex]
[tex]2P = 45[/tex]
Divide both sides by 2
[tex]P = 22.5[/tex]
Substitute 22.5 for P in [tex]M = 60 - P[/tex]
[tex]M = 60 - 22.5[/tex]
[tex]M = 37.5[/tex]
Calculate the difference; M - P
[tex]M - P = 37.5 - 22.5[/tex]
[tex]M - P = 15[/tex]
Hence, there are 15 more measles vaccines than polio vaccines
order the following numbers from least (top) to greatest number( bottom) . 0.40 , 0.489 , 0.430 , 0.480
Answer:
[tex]\Large \boxed{0.40 < 0.430 < 0.480 < 0.489}[/tex]
Step-by-step explanation:
First you have to see the decimal places.
Than the number of digits there is.
So this is how we make it from least to greatest!
Since there is 3 numbers after the decimals in almost all of them...
Than let’s make ‘0.40’ into 3 numbers after the decimal too.
I am sure you have heard that if you add a ‘0’ to a decimal nothing will change right?
So let’s make 0.40 into 3 numbers after the decimal just like the other numbers!
Okay so first let’s add a zero to ‘0.40’... which now this turns into ‘0.400’
Now it will be more easier to compare least to greatest!
0.400 is the least, than comes 0.430, & than would be 0.480, & finally the greatest would be 0.489
Therefore the answer is 0.40 < 0.430 < 0.480 < 0.489.