Answer:
x=-8
Step-by-step explanation:
Step 1.) 0.4x-2.5=1.3x+4.7
Step 2.) -2.5=1.3x-0.4x+4.7
Step 3.) -2.5=0.9x+4.7
Step 4.) -2.5-4.7=0.9x
Step 5.) -7.2=0.9x
Step 6.) -7.2/0.9=x
Step 7.) -8=x
Anna is saving to buy some souvenirs on a family vacation. She has already saved $125, and she saves another $2 from her allowance every day. Formulate and then graph the equation that models the total amount Anna saves, y, in terms of the number of days she adds to her savings, X.
Answer:
125+2x=y (take 125 add 2x for $2 a day and then = y for amount saved)
Points on Graph:
(125,0)
(135,5)
(145,10)
(155,15)
(165,20)
(175,25)
(185,30)
(195,35)
(205,40)
(215,45)
(225,50)
Answer:
Step-by-step explanation:
Board 1
C
(3x + 16)°
7
(5x - 54)
Board 2
Enter the measure of ZC.
Answer:
59°
Step-by-step explanation:
From the question given, we obtained the following:
C + (3x + 16) = 180 (sum of angle on a straight line)
5x – 54 = 3x + 16 (Altanate angles are equal)
Next, we shall determine the value of x.
This can be obtained as follow:
5x – 54 = 3x + 16
Collect like terms
5x – 3x = 16 + 54
2x = 70
Divide both side by the coefficient of x i.e 2
x = 70/2
x = 35
Finally, we shall determine the value of C as shown below:
C + 3x + 16 = 180
But, x = 35
C + 3(35) + 16 = 180
C + 105 + 16 = 180
C + 121 = 180
Collect like terms
C = 180 – 121
C = 59°
Therefore, the value of C is 59°
How would you explain a number system to someone who had never seen numbers before?
We have that in teach number system to someone who had never seen numbers before you have to give a clear and understand explanation on numbers and number systems to in a language they can understand.
Firstly we have to understand what number are
Numbers
A number or numbers are just words or expressions or drawings or even symbols use to represent(Represent being a key word) a particular quantity or used to calculate.
With the definition above every one must have come across number but in a different way from other
Therefore
its just left for you to open their eyes to what the have already encountered
Firstly you have to give the person a Generally knowledge on NumbersSecondly you have to teach the person the different branches of number system which are Decimals Binary Octal Hexadecimal And the various basesFinally you give a test to ensure the person has understood you.In conclusion
You have to give a clear and understand explanation on numbers and number systems to in a language they can understand
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A number system is a mathematical system for representing numbers, that is, quantities.
Thus, the numbers are writing symbols that allow a mental representation of a certain quantity, as well as the different mathematical operations that arise from said quantities.
Otherwise, that is, if the numbers did not exist, the representation of quantities would be very limited.
It also would only abstain from the existence or nonexistence of a certain thing or situation.
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How can you tell from the graph of Molly’s garden on the previous slide that it represents a proportional relationship?
Answer:
The graph of a proportional relationship has the same unit rate, is a straight line, and starts at the origin.
Step-by-step explanation:
this the answer
The graph of a proportional relationship is a straight line.
What is the equation of a straight line? What do you mean by domain and range of a linear function?The general equation of a straight line is -
y = mx + c
where -
[m] → is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] → is the y - intercept i.e. the point where the graph cuts the [y] axis.
Other possible equations of lines are -
(y - y₁) = m(x - x₁) {Point - slope form}(y - y₁) = (y₂ - y₁) × (x - x₁)/(x₂ - x₁) {Two point - slope form}x/a + y/b = 1 {intercept form}x cos(β) + y sin(β) = L {Normal form}For any function y = f(x), Domain is the set of all possible values of [y] that exists for different values of [x]. Range is the set of all values of [x] for which [y] exists.
We have a graph of Molly’s garden.
Since, the graph is not given, i will write the condition for proportional relationship. The graph of a proportional relationship is a straight line whose equation is given by -
y = mx + c
Therefore, the graph of a proportional relationship is a straight line.
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A coordinate axis is drawn with a parabola pointing up that has vertex of 0,3. Determine the intervals on which the function is increasing, decreasing, and constant. Increasing x < 0; Decreasing x > 0 Increasing x > 0; Decreasing x < 0 Increasing x < 3; Decreasing x > 3 Increasing x > 3; Decreasing x < 3
Answer:
Option (2). Increasing x > 0; decreasing x < 0
Step-by-step explanation:
Equation of the parabola having vertex (0, 3) will be,
y = (x - 0)² + 3
y = x² + 3
To check the function is increasing or decreasing in the given intervals we will find the derivative of the function,
[tex]\frac{dy}{dx}=\frac{d}{dx}(x^{2}+3)[/tex]
y' = 2x
For x < 0 Or x = -1
y' = 2(-1)
= -2 < 0
Therefore, function is decreasing in x < 0
For x > 0 Or x = 1
y' = 2(1) + 3
= 5 > 0
Therefore, function is increasing in x > 0
Option (2) is the answer.
solve 5u– 5(1–u)=u+8
Answer:
u= -3
Step-by-step explanation:Solve for
u by simplifying both sides of the equation, then isolating the variable.
Answer : 5u– 5(1–u)=u+8
5u - 5+ 5u = u+ 8
10u -5 = u+ 8
9u = 13
u = 1.44
1.find the sum. (3^3+5x^2+3x-7)+(8x-6x^2+6)
2. Find the Difference: (8x-4x^2+3\)-(x^3+7x^2+3x-8)
1.
[tex](3^3+5x^2+3x-7)+(8x-6x^2+6)=\\\\=27\ \underline{+\,5x^2}\ \underline{ \underline{+\,3x}}-7\ \underline{\underline{\,+8x}}\ \underline{-\,6x^2}+6=\\\\=-x^2+11x+26[/tex]
or if you mean (3x^3+5x^2+3x-7)+(8x-6x^2+6):
[tex](3x^3+5x^2+3x-7)+(8x-6x^2+6)=\\\\=3x^3\ \underline{+\,5x^2}\ \underline{ \underline{+\,3x}}-7\ \underline{\underline{\,+8x}}\ \underline{-\,6x^2}+6=\\\\=3x^3-x^2+11x-1[/tex]
2.
[tex](8x-4x^2+3)-(x^3+7x^2+3x-8)=\\\\=\underline{8x}\ \underline{\underline{-\ 4x^2}}+3-x^3\ \underline{\underline{-\,7x^2}}\ \underline{-\,3x}+8=\\\\=-x^3-11x^2+5x+10[/tex]
Please hurry simplify the problem a i b 5i c -i
Answer:
[tex]\frac{90}{5} i[/tex]
Step-by-step explanation:
10 * sqrt(81/25 * -1) = 10 sqrt(81/25) * sqrt(-1) = 10 *9/5 * i
Dwayne had 136 songs on his phone. He deleted 56 songs. What is the
ratio of songs he kept to songs he deleted (in its simplest form)?
136 - 56 = 80 songs kept
Ratio of songs kept to songs deleted is:
80:56
Simplify by dividing each number by 8:
The simplest form is: 10/7
Mr Gupta has some rice of worth RS 3000. He sold 1/3 of it with 10% loss .By how many percent must the selling price be increased for making 10% profit on the outlay?
Answer:
20% more of cost price, or 30% more of initial selling price
Step-by-step explanation:
Given:
Product CP = Rs. 3000Sold 1/3 at a loss of 10%Target profit = 10%SP for the rest = ?SolutionTotal money to be obtained:
3000 + 10% = 3000*1.1 = Rs. 3300Money already got:
1/3*3000 - 10% = 1000 - 10% = Rs. 900Money left to obtain:
3300 - 900 = Rs. 2400Product left to sell, worth of:
3000*2/3 = Rs. 2000The difference:
2400 -2000 = Rs. 400Required selling price increase:
400/2000* 100% = 20% of CPOr compared to initial price, new SP to be increased by 30%
Calculate the perimeter of the trapezium
Answer:
P = 26
Step-by-step explanation:
see attached
to get the side 5,
sqrt((10-7)² + 4²)
side = 5
P = 4 + 7 + 5 + 10
P = 26
Evaluate the following expressions if a = 2, b = -3, c = -1, and d = 4. then solve for
2a + C
Answer:
3
Step-by-step explanation:
2a + C
Let a = 2 and c = -1
2* 2 + -1
4 -1
3
Answer:
3Step-by-step explanation:
[tex]a = 2\\ b = -3\\c = -1\\ d = 4\\\\2a+c =?\\2(2) +(-1)\\\\\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:2\left(2\right)\::\quad 4\\=4+\left(-1\right)\\\\\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:4+\left(-1\right)\:\\:\quad 3[/tex]
Your annual salary is $61,061.83 what is your semimonthly salary
A restaurant adds a 20% tip to the bills of parties of 6 or more people. Suppose a server waits on five such tables. The bill
without the tip for each party is listed in the table. How much did the server make in tips during this shift?
Distributive Property: a(b + c) = ab + ac and (b + c)a = ba = ca
Party 1
Party 2
Party 3
Party 4
Party 5
$185.45 $205.20 $195.05 $245.80 $262.00
Answer:
$218.70
Step-by-step explanation:
You need to first convert the percentage to the decimal.
20% = 0.2
Now, you need to find 20% of each bill by multiplying each bill by 0.2.
0.2(185.45) + 0.2(205.20) + 0.2(195.05) + 0.2(245.80) + 0.2(262.00)
Because of the distributive property, you can add up the bills and multiply the sum by 0.2.
0.2(185.45 + 205.20 + 195.05 + 245.80 + 262.00)
0.2(1093.50)
218.7
The waiter made $218.70 in tips.
Preview: 5 People fit comfortably in a 2 foot by 2 foot area. Use this value to estimate the size of a
crowd that is 4 feet deep on both sides of the street along a 1-mile section of a parade route.
Answer:
The estimate size of the crowd is 52800 people
Step-by-step explanation:
The given information are;
The number of people that fit comfortably in a 2 by 2 foot area = 5
Therefore, we have;
The area occupied by the 5 people = 2 × 2
The crowd ratio = 5/(2 × 2) = 5/4
The area occupied by the crowd = 4 feet deep, and 1 mile long on both sides of the street
By conversion factors, 1 mile = 5,280 feet
Therefore, the area occupied by the crowd = 4 × 5280 × 2 = 42240 ft²
The number of people in the crowd = Crowd ratio × The area occupied by the crowd
The number of people in the crowd = 5/4 × 42240 = 52800 people
Therefore, The estimated size of the crowd = 52800 people.
which is a function? {(8,9),(−2,9),(7,5),(−4,−7)} {(−5,−7),(−5,4),(−2,−8),(3,5)} {(8,0),(−4,−2),(7,1),(0,0)} {(−8,3),(−5,−7),(−4,5),(9,3)}
Answer:
All but the second {(8,9),(−2,9),(7,5),(−4,−7)} {(8,0),(−4,−2),(7,1),(0,0)} {(−8,3),(−5,−7),(−4,5),(9,3)}Step-by-step explanation:
Function means that for each x we get y, and no no x gives two different y-es
{(−5,−7),(−5,4),(−2,−8),(3,5)} for x = -5 we have two different y-es therefore its not function
What is the product of complex conjugates? The product of complex conjugates is a difference of two squares and is always a real number. The product of complex conjugates is the same as the product of opposites. The product of complex conjugates may be written in standard form as a+bi where neither a nor b is zero. The product of complex conjugates is a sum of two squares and is always a real number.
Answer:
Last given option is the correct answer:
"The product of complex conjugates is a sum of two squares and is always a real number."
Step-by-step explanation:
The product of two conjugates can be described and solved like this:
[tex](a + b\,i) \,(a - b\,i)= a^2-a\,b\.i+a\,b\,i-b^2\,i^2=a^2+0-b^2\,(-1)= a^2+b^2[/tex]
so, no matter what the values for the real values a and b are, the product is always a real number and the sum of two squares.
Answer:
(a + bi)(a – bi) = a2 – (bi)2 = a2 + b2
The product of a complex number and its complex conjugate is
✔ always
a real number.
Without simplifying Select all the expressions that represent a rational number( someone helppppppp)
Answer:
The correct options are;
[tex]4\dfrac{2}{3} - \dfrac{\sqrt{4} }{8}[/tex]
[tex]4\dfrac{2}{3} \div \dfrac{\sqrt{4} }{8}[/tex]
Step-by-step explanation:
We note that a rational number is one that can be expressed as a ratio of two integers a and b
An irrational number is one that cannot be expressed as a ratio of two integers. Example of an irrational number is √3
Also an irrational number divided by a rational number is an irrational number, therefore, we have, the expressions without irrational numbers, which are;
[tex]4\dfrac{2}{3} - \dfrac{\sqrt{4} }{8}[/tex] = [tex]\dfrac{53}{12}[/tex]
and
[tex]4\dfrac{2}{3} \div \dfrac{\sqrt{4} }{8}[/tex]
Alicia had $-11 in her checking account. She did a few chores and made $44.50. She
decided to pay for her and a friend to go to the movies, and each ticket cost $6.25. How
much money does she have left in her checking account?
Answer:
she would have 21 dollars left
Step-by-step explanation:
44.50-11
33.50-12.50
Answer:
[tex]\Huge \boxed{\$ \ 21}[/tex]
Step-by-step explanation:
She had $-11 initially and gained $44.50.
-11 + 44.5 = 33.5
She has $33.5 in her account.
She buys two tickets for $6.25 each.
33.5 - (2)6.25 = 21
She has $21 left in her account.
1. Marcar con rojo los pares de ángulos que sean complementarios y con verde los que sean suplementarios. A. 25º B. 155º C. 65º D. 30º E. 150º F. 15º G. 28º 2. Averiguar el valor de los ángulos a. ¿Cuál es el complemento de un ángulo a=39º? b. Se sabe la amplitud del ángulo R=143º pero se desconoce la del ángulo m, ¿Cuánto medirá m?
Answer:
A y C → complementarios
A Y B → suplementarios
D Y E → suplementarios
El complemento de un ángulo de 39°, mide 51°
La amplitud de m, como suplemento es de 36°
Si lo tomamos como ángulo conjugado, es de 217°
Step-by-step explanation:
Ángulos completarios → Aquellos que sumados, me dan 90°
Ángulos complementarios → Aquellos que sumados, me dan 180°
Angulos complementarios entonces, son:
A y C (sumados, dan 90° → 25 + 65)
Angulos suplementarios entonces, son:
A y B (sumados, dan 180° → 25 + 155)
D y E (sumados, dan 180° → 30 + 150)
Complemento de un ángulo de 39° → Ya vimos que su suma debe dar 90°, por lo que el complemento mide: 90 - 39 = 51°
Si la amplitud del ángulo R es 143°, la del ángulo m, será 37°. Sería el ángulo suplementario a R.
No podríamos tener un complemento porque estamos en valores a 90°, pero también se podría obtener otro ángulo cuya amplitud sea de 217°, en este caso ambos ángulos suman 360°, se los llama angulos conjugados.
If you were in charge of the money, how would you recommend your friends spend it? Explain why you choose the solution you did. Why do you think it's the most fair? (3 points:1 point for stating your recommendation and 2 points for explaining your reasoning)
Answer:
I would recommend them to go out with their family and spend it because i feel that people always dream about ways to bring their family close again so that can be a good way to bond and do things that often cost a lot of money.
Step-by-step explanation:
Problem: What values of a and b make this statement false? |a-b|=|a|-|b|
Answer:
All (a,b) that satisfy a.b < 0 will make that statement false
Step-by-step explanation:
It is only right when:
|a-b| = |a| - |b|
<=> ( |a-b| ) ^ 2 = ( |a| - |b| ) ^ 2
<=> a^2 - 2ab + b^2 = a^2 - 2.|ab| + b^2
<=> ab = |ab|
<=> ab ≥ 0
So, when ab < 0, it's wrong
Find the value of x. A. 51 B. 76.25 C. 129 D. 25.25
Answer:
[tex]\Huge \boxed{\mathrm{C. \ 129 }}[/tex]
Step-by-step explanation:
Apply : Angles of Intersecting Chords Theorem
m∠x is half the sum of the measure of the arcs intercepted by the angle and its vertical angle.
m∠x = 1/2(54+204)
Add numbers in brackets.
m∠x = 1/2(258)
Expand brackets.
m∠x = 129
On three science tests, Olivia has received scores of 89%, 98%, and 96%. What is the lowest score Olivia can get on her fourth and final science test to
achieve an average score of 95%?
Answer:
97%
Step-by-step explanation:
89%+98%+96%+?=95×4
283+?=380
?=380-283
?=97%
The lowest score Olivia can get on her fourth test is 97%.
The average score can be determined by dividing the sum of the four scores by the total number of tests taken.
The first step is to determine the sum of the three scores Olivia already has.
Sum of scores = 89 + 98 + 96 = 283%
The second step is to multiply 95 x 4. 95% x 4 = 380%
The third step is to subtract 283% by 380%. 380% - 283% = 97%
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(x²+10x+7)(2x-1) = 2x³+19x²+4x-7 show the steps
After a baby was born, he began to gain weight at a rate of 2 pounds per month. The weight of the baby at birth was 10 pounds. write an equation for W, in terms of t, representing weight, in pounds, of the newborn baby tt months after birth.
Answer:
[tex]W(t) = 2t[/tex]
Step-by-step explanation:
Given
Weight = 2 pounds
Rate = monthly
Required
Determine the weight of the baby in t months
When the baby is 1 month old, t = 1;
[tex]Weight = 2\ pounds * 1[/tex]
[tex]Weight = 2\ pounds[/tex]
When the baby is 2 months old, t = 2;
[tex]Weight = 2\ pounds * 2[/tex]
[tex]Weight = 4\ pounds[/tex]
When the baby is t months old;
[tex]Weight = 2\ pounds * t[/tex]
[tex]Weight = 2t\ pounds[/tex]
Represent Weight as a function of t
[tex]W(t) = 2t[/tex]
Hence, the formula is [tex]W(t) = 2t[/tex]
Your sock drawer has two white socks, four brown socks, and two black socks. You randomly pick a sock and put it on your left foot and then pick another sock and put it on your right foot. You leave the house with a white sock on your left foot and a brown sock on your right foot. Find the probability of this occuring.
Answer:
1/7
Step-by-step explanation:
From the above question, we have the following values:
White socks = 2
Brown socks = 4
Black socks = 2
Total number of socks = 8
We are told in the question that:
You randomly pick a sock and put it on your left foot and then pick another sock and put it on your right foot. You leave the house with a white sock on your left foot and a brown sock on your right foot.
From above question, we can see that this is a probability with dependent events. This means have a white sock on your left foot and brown sock on your right are events that depend on each other, hence, the probability will occur with replacement.
The probability ( having a white sock on your left foot and brown sock on right) =
2/8 × 4/7
= 8/56
= 1/7
Therefore, the probability of this occuring is 1/7
-6/11 + (-5/11) =? HELP ASAP ps the dash means that there a fraction
Answer:
-1
Step-by-step explanation:
Since the denominators are the same, then we add the numerators
-6+-5/11
-11/11
-1
Step-by-step explanation:
-6/11 - 5/11 = -11/11
1. The fraction of -5/11 stays negative because -*+ = -. So the fraction stays negative.
2. Then, you can add the two fractions because they are both the same sign and also have the same denomination.
The answer is -1 or -11/11.
Hope this helped,
Kavitha
What is the slope of the line that passes through the points (10, 3)(10,3) and (2, 3) ?(2,3)? Write your answer in simplest form.
Answer:
0
Step-by-step explanation:
The y's are the same so they do not go up or down so the slope is 0.
The slope of the line passes through points (10, 3) and (2, 3) is 0.
Given that,
The slope of the line that passes through points (10, 3) and (2,3) is to be determined.
The slope of the line is a tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.
here,
The slope of the line passes through the point (10, 3) and (2, 3).
Now, put the point in the equation of the slope,
m =(y₂ - y₁) / (x₂ - x₁)
m = 3 - 3 / (2 - 10)
m = 0 / -8
m = 0
Thus, the slope of the line passes through the points (10, 3) and (2, 3) is 0.
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How to get the answer
Answer:
2*x^4*z^3
Step-by-step explanation:
To answer this kind of question, you first start rearranging the terms in the numerator and denominator, so you don't get confused.
3x^3 * 4x^3 * z^4 / 2x * x * 3z
Now you multiply like parts in the numerator and denominator to keep it simple.
(3x^3 * 4x^3) * z^4 / (2x * x) * 3z
3x^3 * 4x^3 = 12x^6
2x * x = 2x^2
12x^6 * z^4 / 2x^2 * 3z
Now divide like terms that are in the numerator and denominator so multiplying later will be easier.
12x^6 / 2x ^ 2 * z^4 / 3z
12x^6 / 2x^2 = 6x^4
z^4/3z = z^3 / 3
Now you multiply both terms,
6x^4 * z^3/3
2*x^4*z^3