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Readme [11.4K]
2 years ago
7

If f(x)=2x+5 , determine the value of f(3x) .

Mathematics
2 answers:
makvit [3.9K]2 years ago
7 0

Answer:

Step-by-step ef(x)=-2x+5……i

and f(-3x)=?

let x=-3x so that

-2x+5=-3x

x=5

substitutinx x into… i

f(x)=-10+5=-5

f(5)=-5………ii

now f(–3x)=f(-15)

scrutinizing… ii ,we can propose that

f(-15)=15.

Thus f(-3x)=15xplanation:

ss7ja [257]2 years ago
7 0

f times x would equal to fx=2x+5 and i think we move the x move to the other side which makes it f=3x+5 and then we plug this equal into f(3x) (i think)  which makes it f(3x+f=3x+5)

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If twelve pounds of nails cost $3.84 what is the unit cost A) 32c B) 28c C) 23c D) 18c
aalyn [17]

Answer:

Option A) 32c

Step-by-step explanation:

we know that

To find the unit cost, divide the total cost of twelve pounds by twelve pounds

so

\frac{\$3.84}{12}=\$0.32

Remember that

1$=100 cents

Convert dollars to cents

\$0.32=0.32*100=32c

therefore

The cost of one pound of nails cost 32 cents

7 0
3 years ago
Read 2 more answers
Please help me out with this
Anettt [7]

Answer:

81.75 ft²

Step-by-step explanation:

The area (A) of a trapezoid is calculated using the formula

A = \frac{1}{2} h (a + b)

where a, b are the parallel bases and h is the perpendicular height

Calculate h using the right triangle and the sine ratio

sin30° = \frac{opposite }{hypotenuse} = \frac{h}{10}

Multiply both sides by 10

10 × sin30° = h, thus

h = 5

a = 12 and b = 8.7 + 12 = 20.7, hence

A = \frac{1}{2} × 5 × (12 + 20.7)

   = 0.5 × 5 ×32.7

   = 81.75 ft²

7 0
3 years ago
Find the solution of (x+2)^2 +2=6 by using square roots method​
kogti [31]

Answer:

  • (x + 2)² +2 = 6
  • (x + 2)² = 4
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  • x + 2 = ± 2
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4 0
3 years ago
A line with a slope of 3 passes through the point (0, -10). What is its equation in
andrey2020 [161]

(\stackrel{x_1}{0}~,~\stackrel{y_1}{-10})\qquad \qquad \stackrel{slope}{m}\implies 3 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-10)}=\stackrel{m}{3}(x-\stackrel{x_1}{0}) \\\\\\ y+10=3x\implies \stackrel{\textit{slope-intercept form}}{y=3x-10}

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2 years ago
I need help ASAP!!!Please explain you answer
just olya [345]

Answer:

Step-by-step explanation:

The body of the Cylinder.

Formula

Area of the body = circumference * length

circumference = 2*pi * r

r = 6 m

Circumference = 2 * 3.14 * 6

Circumference = 12 * pi

Area of body = 12*pi * length

area of body = 12*9 * pi

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Two ends

The diagram is not complete enough to know whether or not there are 2 ends or one. I'll assume 2.

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Area = 2 * pi * 6^2

Area = 72 pi

Total Area

Total area = 72 pi +108 pi

Total area = 180 pi

Total Area = 180 * 3.14

Total Area = 565.2

5 0
3 years ago
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