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Ipatiy [6.2K]
3 years ago
6

10 - 2x, when x = 3​

Mathematics
2 answers:
STatiana [176]3 years ago
8 0

Answer:

4

Step-by-step explanation:

10 - 2x

Let x =3

10 -2(3)

10 -6

4

Nesterboy [21]3 years ago
4 0

Answer:

4

Step-by-step explanation:

Plug in 3 as x in the expression:

10 - 2x

10 - 2(3)

10 - 6

= 4

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(x+1)(6x-5) find the indefinite Integral
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3 0
2 years ago
Peter is working for an hourly wage of $12. If he worked for 20 hours last week, what is his gross pay?
exis [7]
If Peter worked 20 hours last week and makes $12 a hour, his gross pay was $240. 

12 x 20 = 240. 
6 0
3 years ago
Read 2 more answers
What is 13.5=m+2.1 equal and how to solve
Greeley [361]

Answer:

m= 11.4

Step-by-step explanation:

13.5= m+2.1

Subtract 2.1 to both sides

13.5= m+2.1

-2.1         -2.1

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7 0
3 years ago
Sadie wants to paint 2 boxes. The paint costs $0.02 cents per square cm. If she throws the lids away, how much will it cost to p
Alex

Answer:

how many square centimeters is the box??

Step-by-step explanation:

8 0
3 years ago
a spherical balloon is deflated at a rate of 256pi/3 cm^3/sec. at what rate is the radius of the balloon changing when the radiu
Hunter-Best [27]
What you need to look for is \frac { dr }{ dt } when r=8.

Now:

Volume\quad of\quad a\quad sphere:\\ \\ V=\frac { 4 }{ 3 } \pi { r }^{ 3 }

\therefore \quad \frac { dV }{ dr } =\frac { 4 }{ 3 } \pi \cdot 3{ r }^{ 2 }=4\pi { r }^{ 2 }\\ \\ \therefore \quad \frac { dr }{ dV } =\frac { 1 }{ \frac { dV }{ dr }  } =\frac { 1 }{ 4\pi { r }^{ 2 } }

And:\\ \\ \frac { dV }{ dt } =-\frac { 256\pi  }{ 3 } \\ \\ Therefore:\\ \\ \frac { dr }{ dt } =\frac { dr }{ dV } \cdot \frac { dV }{ dt }

\\ \\ =\frac { 1 }{ 4\pi { r }^{ 2 } } \cdot -\frac { 256\pi  }{ 3 } \\ \\ =-\frac { 256 }{ 12 } \cdot \frac { \pi  }{ \pi  } \cdot \frac { 1 }{ { r }^{ 2 } }

\\ \\ =-\frac { 64 }{ 3{ r }^{ 2 } } \\ \\ When\quad r=8,\\ \\ \frac { dr }{ dt } =-\frac { 64 }{ 3\cdot { 8 }^{ 2 } } =-\frac { 1 }{ 3 } \\ \\ Answer:\quad -\frac { 1 }{ 3 } \quad cm/sec
3 0
3 years ago
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