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Fofino [41]
3 years ago
5

The product of a number and -3 increased by eight is 20

Mathematics
1 answer:
Assoli18 [71]3 years ago
4 0

Answer:

15

Step-by-step explanation:

20-8 = 12

12- -3 = 15

15 + -3 = 12 + 8 + 20

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Evaluate the function, find f(-2):<br>f(x) = 2x² + 3x​
prisoha [69]

Answer:

2

Step-by-step explanation:

f(-2) = 2(-2)^2 +3(-2)

f(-2)=2

where ever you see x you put -2 there

i hope this helps

4 0
3 years ago
Find the height of a cone with a volume of 150 in^3 and a diameter of 20 in. Use 3.14 for π.
Zolol [24]

Volume = \frac{1}{3} \pi r^{2} h

150 = \frac{1}{3} x 3.14 x 10 x 10 x h

150 x 3 = 314 x h

h = 450/314

h = 1.43 inches

6 0
3 years ago
Help me with these math questions........ WITH SCREENIES
Nutka1998 [239]

Answer: 6.3093

<u>Step-by-step explanation:</u>

3^{\frac{x}{5}} = 4

ln3^{\frac{x}{5}} = ln4

\frac{x}{5} ln3 = ln4

xln3 = 5ln4

x = \frac{5ln4}{ln3}

x = 6.3093

************************************************************

Answer: 5, 3, \frac{1}{5}, D

<u>Step-by-step explanation:</u>

a) x ≤ 0 so, f(-5) = | -5 | = 5

   x ≤ 0 so, f(-3) = | -3 | = 3

   x > 0 so, f(5) = \frac{1}{5}

b) graph D

************************************************************

Answer: \frac{\pi}{12}

<u>Step-by-step explanation:</u>

 \frac{25\pi}{12} - \frac{2\pi}{}

=  \frac{25\pi}{12} - \frac{24\pi}{12}

=  \frac{\pi}{12}

7 0
3 years ago
How do you know that the decimal 2\11 repeats without end?
seropon [69]

It doesn't, it ends after 32 digits after 0.

5 0
3 years ago
The first derivative of x^2+2y^2=16 is -x/(2y), the second is -(2y^2+x^2)/(4y^3). Find the third implicit derivative of x^2+2y^2
gtnhenbr [62]

Answer:

d³y/dx³ = (-2xy² − 3x³ − 4xy²) / (8y⁵)

Step-by-step explanation:

d²y/dx² = (-2y² − x²) / (4y³)

Take the derivative (use quotient rule and chain rule):

d³y/dx³ = [ (4y³) (-4y dy/dx − 2x) − (-2y² − x²) (12y² dy/dx) ] / (4y³)²

d³y/dx³ = [ (-16y⁴ dy/dx − 8xy³ − (-24y⁴ dy/dx − 12x²y² dy/dx) ] / (16y⁶)

d³y/dx³ = (-16y⁴ dy/dx − 8xy³ + 24y⁴ dy/dx + 12x²y² dy/dx) / (16y⁶)

d³y/dx³ = ((8y⁴ + 12x²y²) dy/dx − 8xy³) / (16y⁶)

d³y/dx³ = ((2y² + 3x²) dy/dx − 2xy) / (4y⁴)

Substitute:

d³y/dx³ = ((2y² + 3x²) (-x / (2y)) − 2xy) / (4y⁴)

d³y/dx³ = ((2y² + 3x²) (-x) − 4xy²) / (8y⁵)

d³y/dx³ = (-2xy² − 3x³ − 4xy²) / (8y⁵)

8 0
3 years ago
Read 2 more answers
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