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Natalka [10]
4 years ago
13

3m-5m-12=7m-88-5 plz show all work

Mathematics
1 answer:
hammer [34]4 years ago
3 0
3m - 5m - 12 = 7m - 88 - 5

-2m - 12 = 7m - 88 - 5 

-2m - 12 = 7m - 93

-12 = 7m - 93 + 2m

-12 = 9m - 93

-12 + 93 = 9m

81 = 9m

9 = m

hope that helps, God bless!
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Answer please as best as you can
mash [69]

The volume of a larger cone:

V_l=\dfrac{1}{3}\pi\cdot4.5^2\cdot(3+6)=\dfrac{1}{\not3_1}\pi\cdot20.25\cdot\not9^3=(20.25)(3)\pi=60.25\pi\ cm^3

The volume of a smaller cone:

V_s=\dfrac{1}{3}\pi\cdot3^2\cdot6=\dfrac{1}{\not3_1}\pi\cdot\not3^1\cdot3\cdot6=18\pi\ cm^3

The volume of the frustum:

V=V_l-V_s\\\\V=60.25\pi-18\pi=42.75\pi\ cm^3

<h3>Answer: 42.75π cm³.</h3>
4 0
3 years ago
Fter completing the fraction division 7/3 : 2/9 , Bai used the multiplication below to check his work.
Vitek1552 [10]
First off all, let's find 
\dfrac{7}{3} : \dfrac{2}{9} = \dfrac{7}{3} \cdot  \dfrac{9}{2}= \dfrac{63}{6} = \dfrac{21}{2}.

This shows that Bai found the correct quotient.

If a:b=c, then a=c\cdot b. Using this rule, you have to check that \dfrac{7}{3} is equal to product  \dfrac{21}{2} \cdot  \dfrac{2}{9}. 

Thus, Bai checked his work using multiplication correctly.

Answer: Correct choice is A. 

7 0
4 years ago
Read 2 more answers
Imagine you have five total nieces and nephews and their ages are 4, 10, 8, 9, and 5. What is the average age of your nieces and
Eddi Din [679]

Answer:

The mean is 7.2 and the median ( average) is 8

Step-by-step explanation:

4 + 10 + 8 + 9 + 5 = 36 / 5

The mean is 7.2 and the median ( average) is 8

7 0
2 years ago
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The graphed line shown below is y = 5 x minus 10. On a coordinate plane, a line goes through (2, 0) and (3, 5). Which equation,
anygoal [31]

Answer:

The correct option is:

y = 5(x-2)

Step-by-step explanation:

The graphed line is;

y = 5x - 10

y = mx + c

Thus, slope of graphed line is equal to m=5.

Those line will have no solution which have are parallel to the graphed line (have a slope of 5) and passes through the given points.

Following lines have the slopes 5:

y= 5(x+2)

y= 5(x-2)

Check which equation satisfied points (2,0) and (3,5)

For (2,0)

y=5(x-2)

y=5(2-2)

y=0

For (3,5)

y=5(x-2)

y=5(3-2)

y=5

Thus, correct option is y = 5(x-2)

5 0
4 years ago
Read 2 more answers
A train travels a distance of 60 km at uniform speed. If the speed of the train was reduced by 10 kmh-1, the time taken to trave
tester [92]

Answer:

<u>Initial</u><u> </u><u>speed</u><u> </u><u>is</u><u> </u><u>3</u><u>2</u><u> </u><u>m</u><u>/</u><u>s</u>

At uniform speed, acceleration is 0, (a = 0).

When speed reduced, (v - u) = 2.78 ms-¹, t = 1800 sec, s = 60 ,000 metres.

From first equation of motion:

{ \boxed{ \bf{v = u + at}}} \\  { \tt{(v - u) = at}}

substitute:

{ \tt{2.78 = (a \times 1800)}} \\ { \tt{acceleration = 0.0015 \:  {ms}^{ - 2} }}

from second equation of motion:

{ \boxed{ \bf{s = ut +  \frac{1}{2} a {t}^{2} }}}

substitute:

{ \tt{60000 = 1800u + ( \frac{1}{2} \times 0.0015 \times  {1800}^{2})  }} \\ { \tt{1800u = 57570}} \\ { \tt{u = 32 \: m {s}^{ - 1} }}

5 0
3 years ago
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