For [tex]\fbox{\begin \\\math{x}=6\\\end{minispace}}[/tex] the function [tex]f(x)=-x^{2} +4x+12[/tex] and [tex]g(x)=-x+6[/tex] has same value.
Step by step explanation:
The given functions are,
[tex]f(x)=-x^{2}+4x+12[/tex]
[tex]g(x)=-x+6[/tex]
Step 1:
Substitute [tex]x=1[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(1)[/tex].
[tex]f(1)=-1^{2} +4(1)+12\\f(1)=-1+4+12\\f(1)=15[/tex]
Substitute [tex]x=1[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(1)[/tex] .
[tex]g(1)=-1+6\\g(1)=5[/tex]
Step 2:
Substitute [tex]x=2[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(2)[/tex].
[tex]f(2)=-2^{2} +4(2)+12\\f(2)=-4+8+12\\f(2)=16[/tex]
Substitute [tex]x=2[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(2)[/tex] .
[tex]g(2)=-2+6\\g(2)=4[/tex]
Step 3:
Substitute [tex]x=3[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(3)[/tex].
[tex]f(3)=-3^{2} +4(3)+12\\f(3)=-9+12+12\\f(3)=15[/tex]
Substitute [tex]x=3[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(3)[/tex] .
[tex]g(3)=-3+6\\g(3)=3[/tex]
Step 4:
Substitute [tex]x=4[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(4)[/tex].
[tex]f(4)=-4^{2} +4(4)+12\\f(4)=-16+16+12\\f(4)=12[/tex]
Substitute [tex]x=4[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(4)[/tex] .
[tex]g(4)=-4+6\\g(4)=2[/tex]
Step 5:
Substitute [tex]x=5[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(5)[/tex].
[tex]f(5)=-5^{2} +4(5)+12\\f(5)=-25+20+12\\f(5)=7[/tex]
Substitute [tex]x=5[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(5)[/tex] .
[tex]g(5)=-5+6\\g(5)=1[/tex]
Step 6:
Substitute [tex]x=6[/tex] in [tex]f(x)=-x^{2} +4x+12[/tex] to obtain the value of [tex]f(6)[/tex].
[tex]f(6)=-6^{2} +4(6)+12\\f(6)=-36+24+12\\f(6)=0[/tex]
Substitute [tex]x=6[/tex] in [tex]g(x)=-x+6[/tex] to obtain the value of [tex]g(6)[/tex] .
[tex]g(6)=-6+6\\g(6)=0[/tex]
Step 7:
As per the given condition [tex]f(x)=g(x)[/tex].
(a). Substitute [tex]f(x)=-x^{2} +4x+12[/tex] and [tex]g(x)=-x+6[/tex] in above equation.
[tex]-x^{2} +4x+12=-x+6[/tex]
(b). Multiply with [tex]-1[/tex] on both sides.
[tex]x^{2} -4x-12=x-6[/tex]
(c). Shift the term [tex]x-6[/tex] to left hand side.
[tex]x^{2} -4x-12-x+6=0\\x^{2} -5x-6=0[/tex]
(d). Split the middle term in such a way that its sum is 5 and multiplication is 6.
[tex]x^{2} -(6-1)x-6=0\\x^{2} -6x+x-6=0\\x(x-6)+1(x-6)=0\\(x+1)(x-6)=0\\x=-1 ,6[/tex]
It is observed from the above solution that for [tex]x=6[/tex] both the functions [tex]f(x)[/tex] and [tex]g(x)[/tex] has same value.
Direct method:
[tex]f(x)=g(x)\\\Leftrightarrow-x^{2} +4x+12=-x+6\\\Leftrightarrow-x^{2} +4x+12+x-6=0\\\Leftrightarrow-x^{2} +5x+6=0\\\Leftrightarrow-x^{2} +6x-x+6=0\\\Leftrightarrow x^{2} -6x+x-6=0\\\Leftrightarrow x(x-6)+1(x-6)=0\\\Leftrightarrow(x+1)(x-6)=0\\\Leftrightarrow x=6,-1[/tex]
The table for the function [tex]f(x)=-x^{2} +4x+12[/tex] and [tex]g(x)=-x+6[/tex] is attached below.
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Answer details:
Grade: Middle school.
Subjects: Mathematics.
Chapter: Function.
Keywords: Function, Middle term split method, Binomial,Quadratic, Polynomial, Factorized, Perfect square, Zeros, Zeros of a function, Expression, Equation, x, x^2, x^3, -x^2+4x+12, -x+6, roots of equation.
Answer:
The answer would be D.
Step-by-step explanation:
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One week, Katie Hopper earned the following commissions: Monday, $124; Tuesday, $88; Wednesday, $62; Thursday, $137; Friday, $195. Find her total amount of commissions for the week
add them together:
124 + 88 + 62 +137 +195 = $606 total
Jack is building a deck that is 8 ft by 27.63 ft. He has the base built; he just needs to cover the surface with wood. When he gets to the hardware store he finds sheets of wood that are four ft by eight ft. Use estimation to determine how many sheets of wood he should buy to cover the surface of the deck.
to the nearest whole degree, what angle measure has a sine of .9762
When factored, the trinomials x^2-2x-15 and x^2-9x+20 have one binomial factor in common. What is this factor?
1. x-7
2. x+7
3. x-5
4. x+5
The length of a rectangle is 2 yd longer than its width. if the perimeter of the rectangle is 24 yd , find its area.
Jennifer is on a trip and travels a distance of 150 miles. she spends some of her time walking, and some of her time travelling by train. if she spends w hours walking and t hours travelling by train, what is the meaning of 3w in the equation below? 50t + 3w =150
In the equation 50t + 3w = 150, 3w represents the distance Jennifer travels by walking in 3 hours.
Explanation:In the equation 50t + 3w = 150, the term 3w represents the distance Jennifer travels by walking. Since w represents the number of hours she spends walking, 3w represents the distance she walks in 3 hours. This is because the rate of walking is constant, so if Jennifer walks for 1 hour and covers a certain distance, she would walk 3 times that distance in 3 hours.
Evaluate 9 y 1 − y 0 9y1−y0 if y=−8 y=−8 .
Answer:
Step-by-step explanation:
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Factor completely −3x2 + 6x − 9.
−3(x2 − 2x + 3)
−1(x2 − 6x + 9)
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In the diagram, which two points are shown to be collinear?
In the given diagram, the points that are shown to be collinear are H and E.
Collinearity in geometry refers to the condition where three or more points lie on the same straight line. In this case, points H and E are collinear as they lie on the same straight line, which is represented by a vertical double-headed arrow passing through them.
The diagram consists of two parallelograms, labeled 'I M' and 'E P', with three points inside each. In the parallelogram 'I M', the points are labeled as I, H, and J from top to bottom. Similarly, in the parallelogram 'E P', the points are labeled as F, E, and G from top to bottom. Among these points, only H and E share the same straight line, making them collinear. The other points do not share this line and hence are not collinear with H and E. This concept is fundamental in understanding geometric relationships and properties.
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2400 in2
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a lab researcher wants to find out whether mice will run through a maze quicker during the day or at night, after training. He has 100 mice available. He randomly assigns 50 of them into ech group. He trains the first group to run the maze ar 9:00am and trains the sevond group to run the maze ar 9:00 pm. Each mouse is trained the same way, and the last 3 years run times are recored. Describe what is being measured in this experiment and what variable is being manipulated?
In this case, since the run times are the one being compared and recorded, therefore the data being measured in the experiment is the run times.
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What are the amplitude, period, and midline of f(x) = 3 cos(4x − π) + 2?
Answer:
The amplitude of the function is 3, period of the function is [tex]\frac{\pi}{2}[/tex] and midline of the function is 2.
Step-by-step explanation:
The given function is
[tex]f(x)=3\cos(4x-\pi)+2[/tex] .... (1)
The standard form of a Cosine function is
[tex]g(x)=a\cos(bx+c)+d[/tex] ... (2)
where, a is amplitude, period is [tex]\frac{2\pi}{b}[/tex] and d is midline.
From (1) and (2), we get
[tex]a=3,b=4,d=2[/tex]
The amplitude of the function is
[tex]a=3[/tex]
The period of the function is
[tex]\frac{2\pi}{b}=\frac{2\pi}{4}=\frac{\pi}{2}[/tex]
The midline of the function is
[tex]d=2[/tex]
Therefore the amplitude of the function is 3, period of the function is [tex]\frac{\pi}{2}[/tex] and midline of the function is 2.
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Answer:
b
Step-by-step explanation:
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The students in the fourth grade sold 684 erasers for a fund-raiser. They sold 4 times as many erasers as the students in fifth grade. How many erasers did the students in 5 grade sell?
The students in fifth grade sold 171 erasers
How Many Erasers Did the Fifth Grade Students Sell?
The question asks us to find out how many erasers the students in fifth grade sold based on the sales of fourth graders. We are told that the fourth grade students sold 684 erasers and that this number is 4 times the amount sold by the fifth graders. To find the number of erasers sold by the fifth graders, we need to perform a division operation.
Setting up the equation, let x be the number of erasers the fifth-grade students sold. Thus, 4x = 684. To solve for x, we divide both sides of the equation by 4. Therefore, x = 684 / 4 = 171.
So, the students in fifth grade sold 171 erasers for the fund-raiser.
05.02)
Two right triangles are graphed on a coordinate plane. One triangle has a vertical side of 2 and a horizontal side of 6. The other triangle has a vertical side of 10 and a horizontal side of 30.
Could the hypotenuses of these two triangles lie along the same line?
No, because they are not similar triangles
No, because one is larger than the other
Yes, because they are both right triangles
Yes, because they are similar triangles
Answer:
Yes, because they are similar triangles
Step-by-step explanation:
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y < –1/2x
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y ≤ –1
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on ed
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Final answer:
The diameter d of a circle can be expressed in terms of the area A by first solving the area formula A = πr^2 for r, giving r = √(A/π), and then substituting r into the diameter formula d = 2r, resulting in d = 2√(A/π).
Explanation:
To rewrite the formula for the diameter of a circle in terms of the area, we start with the given formula for area A = πr^2 and the equation for diameter d = 2r. Our aim is to express the diameter d solely in terms of the area A. To achieve this, we rearrange the area formula to solve for the radius r:
A = πr^2r^2 = A/πr = √(A/π)Then, we substitute r into the diameter formula:
d = 2rd = 2√(A/π)Thus, the diameter d can be expressed in terms of the area A as d = 2√(A/π).
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72,000
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0.0072
0.00072
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