(x + 7)² = 20
subtract 34 from both sides
x² + 14x = - 29
add (half the coefficient of the x- term )² to both sides
x² + 2(7)x + 49 = - 29 + 49
(x + 7)² = 20
Amy wants to carpet a room that is 12 feet by 8 feet.How many square yards of carpet will she need to complete the room?
96 square yards would complete the room
MATH PLEASE HELP!
Identify the vertex and the y-intercept of Y=-2(x+3)^2+2the graph of the function .
A.vertex: (−3, 2); y-intercept: −16
B.vertex: (−3, −2); y-intercept: 11
C.vertex: (3, 2); y-intercept: −16
D. vertex: (3, −2); y-intercept: −18
Identify the vertex and the y-intercept of the graph of the function Y=-2(x+2)^2+2
A.vertex: (−2, 2); y-intercept: −6
B.vertex: (2, 2); y-intercept: −6
C. vertex: (−2, −2); y-intercept: 6
D. vertex: (2, −2); y-intercept: −8
A and A
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
y = - 2(x + 3)² + 2 is in this form
with vertex = ( - 3, 2)
To find the y-intercept let x = 0
y = - 2(3)² + 2 = - 18 + 2 = - 16
Similarly
y = - 2(x + 2)² + 2 is in vertex form
vertex = ( - 2 , 2)
x = 0 : y = - 2(2)² + 2 = - 8 + 2 = - 6 ← y- intercept
Herky was given the following system of equations to solve.
3x-2y=17
x-3y=1
What is the solution to the system?
(2,7)
(20/7,67/7)
(7,2)
(67/7,20/7)
Answer:
Option 3 (7,2) is right answer.
Step-by-step explanation:
Given two equations
3x-2y=17 ... i
x-3y=1 ... ii
We can solve this by elimination.
coefficients of x are 3 and 1 with LCD = 3
Hence multiply ii equation by 3
3x-9y = 3 ... iv
3x-2y = 17 ... i
Subtract i from iv
-7y = -14
Divide by -7
y =2
Substitute in ii
x-3(2) = 1
x=7
Hence solution is (7,2)
Verify:
We can verify our solution by substituting in i and ii.
3(7)-2(2) = 17 and 7-6 =1
Verified
Patrick was born with 1/7 of his faults and acquired the rest during his teenage years. if we was born with 326 faults, how many does he have in total?
Remark
How does this poor soul survive?
Solution
Let the number of faults he has in his teens = x
1/7 of (of means multiply) those faults were there at birth.
1/7 x = 326 Solve for x by multiplying by 7
7* (1/7 x) = 326 * 7
x = 2282 is the number of faults Patrick has. Answer
A rectangular prism has dimensions of x + 1, x - 1, and x. Write an expression for the total volume of the prism.
We have been given the dimensions of the rectangular prism.
Lets say that the length, width, and height of the rectangular prism are:
Length [tex]= x+1[/tex]
Width [tex]=x-1[/tex]
Height[tex]=x[/tex]
Volume of a rectangular prism is given by:
[tex]length \times width\times height[/tex]
Plugging the values of length, width, and height, we get:
Total volume of the prism [tex]= (x+1)\times(x-1)\times x[/tex]
[tex]=(x^2-1)x=x^3-x[/tex] (we have used [tex](a+b)\times (a-b)=a^2-b^2[/tex])
So, the expression for the total volume of the prism is:
[tex](x^3-x)[/tex]
Factor the difference of two cubes completely.
x^3-64
can anyone verify this for me?
[tex]x^3-4^3 = (x-4)(x^2+4x+16)=(x-4)(x+4)(x+4)[/tex]
3/2n-8/3=-29/12
Please show work
The graph of function g is a vertical stretch of the graph of function f by a factor of 3. Which equation describes function g?
A. g(x)=3f(x)
B. g(x)=f(3x)
C. g(x)=f(x3)
D. g(x)=13f(x)
What transformation takes the graph of f(x)=3x+8 to the graph of g(x)=3x+6 ?
A. translation 2 units up
B. translation 2 units left
C. translation 2 units down
D. translation 2 units right
Answer:
Step-by-step explanation:
A vertical stretch by a factor of k means that the point (x, y) on the graph of f (x) is transformed to the point (x, ky) on the graph of g(x), where k <1.
If k =1, then same graph we obtain and if k>1 we get a vertically shrink graph.
In our question, there is a vertical stretch of 3. This means new graph would have points as (x,y/3)
i.e. instead of f(x) = y, we have now f(x) = y/3
So transformation is g(x) = 3f(x)
Option A is correct.
2) Here f(x) = 3x+8 is transformed to g(x) =3x+6
i.e. y intercept is reduced by 2 units. Hence there is a translation of 2 units down.
I did not have the answer to the second question but here is the first.
The perimeter of a given parallelogram is 46 inches. If the length of one side is 14 inches , what is the length of a side adjacent to it ??
Perimeter = 2*14 + 2x where x is length of the adjacent side
46 = 28 + 2x
2x = 18
x = 9 inches Answer
Angels Inscribed and circumscribed.
Remark
The diameter of the circle is AC. The hypotenuse of the right triangle is also AC. This assumes that A,B and C all lie on the circumference of the circle.
Answers
One
The center of the circle is on the diameter of the circle. In fact, the center bisects the diameter. So the center lies on AC and if the center is labeled O then AO = BO.
Answer 1: AC
Two
The answer is the single word diameter.
a card is chosen from a standard deck of cards. what is the probability that the card is a queen, given that the card is a club?
Answer:
Probability that card is queen given that card is club is [tex]\frac{4}{13}[/tex]
Step-by-step explanation:
Given : A card is chosen from a standard deck of cards.
To find : What is the probability that the card is a queen, given that the card is a club?
Solution : It is the conditional probability
[tex]P(A|B)=\frac{P(A\cap B)}{P(B)}[/tex]
Let A is probability that card is queen.
Let B is the probability that card is a club.
Probability that card is queen given card is club [tex]P(A\cap B)=\frac{4}{52}=\frac{1}{13}[/tex]
Probability that card is club from deck of 52 cards [tex]P(B)=\frac{13}{52}=\frac{1}{4}[/tex]
To find probability that card is queen given that card is club [tex]P(A|B)[/tex]
[tex]P(A|B)=\frac{P(A\cap B)}{P(B)}[/tex]
[tex]P(A|B)=\frac{\frac{1}{13}}{\frac{1}{4}}[/tex]
[tex]P(A|B)=\frac{1\times4}{13\times 1}=\frac{4}{13}[/tex]
Therefore, Option A is correct.
Probability that card is queen given that card is club is [tex]\frac{4}{13}[/tex]
Answer:
the correct answer was 1/13
Step-by-step explanation:
i took my test and put 4/13 which was wrong and said that 1/13 is the right answer
Radhika borrowed Rs.12000 from her friends. Out of which Rs.4000 were borrowed at 18% and the remaining at 15% rate of interest per annum. What is the total interest after 3 years?
Answer-
The total interest after 3 years is Rs.5760 .
Solution-
Total money borrowed = Rs.12000
Out of those Rs.4000 is of 18% interest rate and remaining 12000-4000=8000 is of 15% interest rate.
[tex]\text{Total interest}=\frac{P_1\times r_1\times t}{100}+\frac{P_2\times r_2\times t}{100}[/tex]
Where,
P₁ = principal amount = Rs.4000
P₂ = principal amount = Rs.8000
r₁ = rate of interest of P₁ = 18%
r₂ = rate of interest of P₂ = 15%
t = time period = 3 years
[tex]\text{Total interest}=\frac{4000\times 18\times 3}{100}+\frac{8000\times 15\times 3}{100}=2160+3600=5760[/tex]
Kelly and Daniel wrote the following proofs to prove that vertical angles are congruent. Who is correct?
Line segment NT intersects line segment MR forming four angles. Angles 1 and 3 are vertical angles. Angles 2 and 4 are vertical angles. Kelly's Proof Statement Justification ∠2 = ∠4 Vertical angles are congruent. ∠1 = ∠3 Vertical angles are congruent. Vertical Angles are congruent. Vertical Angle Theorem Daniel's Proof Statement Justification ∠1 + ∠2 = 180° Definition of Supplementary Angles ∠1 + ∠4 = 180° Definition of Supplementary Angles ∠1 + ∠2 = ∠1 + ∠4 Transitive Property of Equality ∠2 = ∠4 Subtraction Property of Equality
Both Kelly and Daniel are correct.
Neither Kelly or Daniel is correct.
Kelly is correct, but Daniel is not.
Daniel is correct, but Kelly is not.
Answer:
The answer is Daniel is correct, but Kelly is not.
Step-by-step explanation:
Answer:
(D) Daniel is correct, but Kelly is not.
Step-by-step explanation:
It is given that Line segment NT intersects line segment MR forming four angles. Angles 1 and 3 are vertical angles. Angles 2 and 4 are vertical angles.
Kelly's Proof:∠2 = ∠4 (Vertical angles are congruent)
∠1 = ∠3 (Vertical angles are congruent)
Using Vertical Angle Theorem the vertical angles are equal.
since, we cannot use the direct information given in the question in order to prove the same.
Thus, the justification given by Kelly is incorrect.
Now, Daniel's proof:
∠1 + ∠2 = 180°(Definition of Supplementary Angles)
and ∠1 + ∠4 = 180° (Definition of Supplementary Angles)
⇒∠1 + ∠2 = ∠1 + ∠4(Transitive Property of Equality)
Hence, ∠2 = ∠4(Subtraction Property of Equality)
Thus, the justification of Daniel is correct.
Hence, option (D) is correct.
write the equation in y-intercept form slope 2 passes through point (5,-2)
The equation is y = 2x - 12
ExplanationEquation in slope intercept form is
[tex]y = mx + b[/tex]
Where,
m = slope
b = y-intercept
Putting the value of slope in this equation:
[tex]y = 2x + b[/tex]
From this we can solve the equation for b
[tex]b = y - 2x[/tex]
[tex]b = -2 - 2(5)[/tex]
[tex]b = -12[/tex]
Now, the equation of y-intercept becomes
[tex]y = 2x - 12[/tex]
Leo has 32 coins and wants to make equal groups with 8 coins each.What does the answer tell him?
There would be 4 groups of 8 coins. 32/8=4 Hope I could help!!!
Two bags contain marbels. Bag A conatains 112 marbles, and bag B contains 140 marbles. What percent fewer marbles does Bag A have than bag B
A rectangle measures 14cm x 7cm what is the area
area = 98 cm²
the area of a rectangle = length × width
here length = 14 and width = 7
area = 14 × 7 = 98 cm²
What is 1/5-3/4 help me please i need to step up my grade just a little to get 100%
An appliance repair service charges a flat fee of $75 per service call with an additional $55 per hour. If h represents the number of hours it takes to do the repair, which function models this situation?
The function that models the total cost of the repair service as a function of the number of hours, [tex]\( h \),[/tex] is given by: [tex]\[ C(h) = 75 + 55h \][/tex]
In this situation, the appliance repair service charges a fixed amount of [tex]75[/tex] for making a service call, regardless of how long the repair takes. This is the flat fee component of the cost. Additionally, the service charges [tex]55[/tex] for each hour of work performed by the technician. This is the hourly rate component of the cost.
To model the total cost as a function of the number of hours [tex]h[/tex] that the repair takes, we start with the flat fee of [tex]75[/tex]. We then add the product of the hourly rate [tex]55\\[/tex] and the number of hours [tex]\( h \)[/tex]. This gives us the total cost function:
[tex]\[ C(h) = \text{Flat Fee} + (\text{Hourly Rate} \times h) \][/tex]
[tex]\[ C(h) = 75 + 55h \][/tex]
Here, [tex]\( C(h) \)[/tex] represents the total cost in dollars as a function of the number of hours [tex]\( h \)[/tex] spent on the repair. The term [tex]\( 75 \)[/tex] is the fixed cost, and [tex]\( 55h \)[/tex] represents the variable cost that depends on the number of hours worked.
This linear function correctly models the total cost of the repair service based on the given rates and the time spent on the repair.
The triangle shown below must be congruent
True or false
That would be FALSE
They have the same angles, so they're similar triangles. For them to be congruent, the corresponding sides must have equal length. Here we have two sides of length 7, but they're not corresponding sides. If on the second triangle the 7 was the length of the side between the 60 and 62 degree vertices then we'd have equal corresponding sides and congruent triangles.
Answer: no
Step-by-step explanation: this answer would be FALSEEE
What is the unemployment rate of this economy?
6.5%
9.3%
13.6%
15.7%
The unemployment rate is calculated as the number of unemployed divided by the labor force, resulting in approximately 9.6%, which is the closest to 9.3% as listed. It is higher than the historical average and the February 2015 rate.
Explanation:The unemployment rate of an economy is calculated by taking the number of unemployed persons and dividing it by the total labor force, and then multiplying the result by 100 to get a percentage.
In this case, using the given figures, the unemployment rate is calculated as follows: 14.8 (unemployed) / 153.9 (labor force) = approximately 9.6%.
This indicates that the correct answer is not explicitly listed, but the closest answer given is 9.3%, which seems to be a typo.
Furthermore, this current unemployment rate is significantly higher than the February 2015 rate of 5.5% and above the historical average unemployment rate, which tends to range between 4% to 6% over time, according to Federal Reserve Economic Data.
A local grocery store, a 16 ounce bottle of apple juice cost $3.20. What is the cost of the apple juice per ounce?
answer=3.20/16=0.20 is cost per ounce
What are the place values of the 6,s in 8,462,412,104
Each employee can essemble 28 castles per hour. How many employees worked each hour? (What is the answer to this?)
A dolphin is swimming with her friend. The dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. What is the position of the dolphin's friend relative to the surface of the water?
The dolphin's friend is 8.63 meters below the surface of the water relative to the dolphin's jumping point.
Explanation:To solve this problem, we can use the kinematic equation that relates initial velocity, final velocity, acceleration, and displacement:
vf² = vi² + 2ad
Knowns:Plug in the knowns: (-13.0 m/s)² = (0 m/s)² + 2(-9.8 m/s²)(d)Simplify and solve for d: d = (169 m²/s²) / (-19.6 m/s²)Calculating: d = -8.63 mThe positive value of d indicates that the dolphin's friend is 8.63 meters below the surface of the water relative to the dolphin's jumping point.
The dolphin's friend is 5.3 meters below the surface of the water.
Let's reassess the problem with the given constraints more carefully.
We need to find the position of the dolphin's friend relative to the surface of the water.
1. Dolphin's height above the water:
[tex]\[ 4.5 \text{ meters above the surface} \][/tex]
2. Distance between the dolphin and her friend:
[tex]\[ 9.8 \text{ meters below the dolphin} \][/tex]
Since the friend is swimming below the dolphin, we need to subtract this distance from the height of the dolphin above the surface to find the position of the friend relative to the water surface.
3. Calculate the position of the dolphin's friend:
[tex]\[ \text{Position of friend} = 4.5 \text{ meters} - 9.8 \text{ meters} \][/tex]
[tex]\[ \text{Position of friend} = -5.3 \text{ meters} \][/tex]
This means the dolphin's friend is 5.3 meters below the surface of the water.
Tyrell went to the park to go jogging. The beginning of the running path has a elevation of -2 feet. The higest elevation on the jogging path is 14 feet . What is the difference in elevation between highest point and the beginning of the path
If sin(x) = 1/3 and sec(y) = 17/15 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (enter an exact answer.) "sin(2y)"
Answer: sin2y =240/289 where 0<y <π/2
Step-by-step explanation:
Given sin(x) = 1/3 and sec(y) = 17/15 , where x and y lie between 0 and π/2.
We now that
[tex]cosy = \frac{1}{secy} =\frac{15}{17} \\and\\\text{using identity } sin^2y+cos^2y=1\\\text{we have}\\siny=\sqrt{1-cos^2y}=\sqrt{1-(\frac{15}{17} )^2}=\sqrt{1-\frac{225}{289} }=\sqrt{\frac{64}{289} }=\frac{8}{17} \\\Rightarrow\ siny=\frac{8}{17} \\\text{Now we are using identity sin2A=2sinAcosA we have}\\sin2y=2\cdot\ siny\cdot\ cosy=2\cdot\ \frac{8}{17} \cdot\ \frac{15}{17} =\frac{240}{289}[/tex]
To solve the question, we firstly find cos(y) from 'sec(y) = 17/15' because secant is the reciprocal of cosine. Then, we use the Pythagorean identity to find sin(y). Finally, we substitute these values into the double angle identity 'sin(2y) = 2sin(y)cos(y)' to find the final answer.
Explanation:In this high school level mathematics problem, 'sin(x) = 1/3' and 'sec(y) = 17/15' are given. From 'sec(y) = 17/15', we can calculate cos(y) because secant is the reciprocal of cosine. Hence, 'cos(y) = 15/17'. The question asks for the evaluation of the expression 'sin(2y)'. Here, we can use a trigonometric identity for double angles, which states 'sin(2y) = 2sin(y)cos(y)'.
However, we are only given secant of y, not sine. To find sin(y), we can use the Pythagorean identity. According to this identity, 'sin^2(y) = 1 - cos^2(y)'. So, 'sin(y) = sqrt[1 - (15/17)^2]'.
So, the final answer becomes 'sin(2y) = 2 * √[1 - (15/17)²] * 15/17'. It's useful to note that you should always check that your angle lies within the given range when using a square root in trigonometry, to ensure your answer is correct.
Learn more about Trigonometry here:https://brainly.com/question/11016599
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Which pair is the gcf of 1, 30 and 70, 24 and 44, 12 and 30, and 16 and 21
The GCF is 1.
Explanation:
1 has: 1 (LOL)
12 has: 1,2,3,4,6,12
16 has: 1,2,4,8,16
21 has: 1,3,7,21
24 has: 1, 2, 3, 4, 6, 8, 12, 24
30 has: 1, 2, 3, 5, 6, 10, 15, 30
44 has: 1, 2, 4, 11, 22, 44
70 has: 1, 2, 5, 7, 10, 14, 35, 70
So therefore, The GCF is 1
Hope this helps!
-Queenb369
P.S Could you possible give me the brainlist if i get it right.
If eight trash bags last for thirty days then how many trash bags do you need for 180 days
Set up the proportion. Then cross multiply and isolate the variable to solve.
[tex]\frac{8(trash bags)}{30 (days)} = \frac{x (trash bags)}{180 (days)}[/tex]
8(180)= 30(x)
[tex]\frac{8(180)}{30} = \frac{30x}{30}[/tex]
8(6) = x
48 = x
Answer: 48 trash bags
Find all points on the x-axis that are 14 units from the point (3,-7).
Answer:
(3±√147, 0) ≈ (-9.124, 0) and (15.124, 0)
Step-by-step explanation:
The points (x, 0) satisfy the distance formula:
d = 14 = √((x -3)² +(0+7)²)
196 = (x -3)² +49 . . . . . square both sides
147 = (x -3)² . . . . . . . . . subtract 49
3 ±√147 = x . . . . . . . . . take the square root and add 3
The points at distance 14 from (3, -7) on the x-axis are (3±√147, 0).