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3 years ago

10 - 2x, when x = 3

Mathematics

2 answers:

STatiana [176]3 years ago

8 0

Answer:

Step-by-step explanation:

10 - 2x

Let x =3

10 -2(3)

10 -6

Nesterboy [21]3 years ago

4 0

Answer:

Step-by-step explanation:

Plug in 3 as x in the expression:

10 - 2x

10 - 2(3)

10 - 6

= 4

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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?

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If Peter worked 20 hours last week and makes $12 a hour, his gross pay was $240.

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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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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

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Answer:

how many square centimeters is the box??

Step-by-step explanation:

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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:

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

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

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

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

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

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3 years ago

10 - 2x, when x = 3​

10 - 2x, when x = 3