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NNADVOKAT [17]
3 years ago
8

PLS HELP

Mathematics
1 answer:
Radda [10]3 years ago
8 0

Answer:

-m + 2n - 2

Step-by-step explanation:

R - [S + T]

Since we know  R = 11 - 2m, S = n + 5, and T = -m - 3n + 8,

we can substitute them in.

Replacing R,S and T

11 - 2m - [n + 5+-m - 3n + 8]

Combine inside the brackets

11 - 2m - [n  - 3n-m +5+ 8]

11-2m -[ -2n -m +13]

Distribute the minus sign

11-2m - -2n --m -13

11-2m +2n +m -13

Combine like terms

m-2m +2n +11 -13

-m +2n -2

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Kelly ran 6.2 miles Monday, 10.95 miles Wednesday, and 8.25 miles on Thursday. How many miles did she run in all?
RUDIKE [14]

Answer:

25.4 miles

Step-by-step explanation:

added them all up

but if i just wants miles than tha answer is 25

3 0
3 years ago
38. What is the surface area of a conical grain storage tank that has a height of 62 meters and a diameter of 24 meters? Round t
svetoff [14.1K]
1. The surface area of a cone S is S= \pi  r^{2}+  \pi rl, where r is the radius of the base and l is the slant height.

2. The slant height l is found as follows:

l^{2}= OC^{2}+ OB^{2}
l^{2}= 12^{2}+ 62^{2}=144+3844=3988

l= \sqrt{3988}=63.15

3. 

A=\pi r^{2}+ \pi rl=3.14(12)^{2}+3.14*12*63.15

= 452.16+2379.492 =2831.652 ( m^{2} )

 = 452.16+2379.492 =2831.652 ( m^{2} )

4. The answer is C

8 0
3 years ago
Read 2 more answers
△DEF is shown below.<br><br>Triangle DEF<br><br>What is m∠DEF?​
S_A_V [24]

Answer:

m∠DEF = 50

Step-by-step explanation:

∠DEG = ∠GEF

3y + 4 = 5y - 10

subtract 4 from both sides

3y = 5y - 14

subtract 5y from both sides

-2y = -14

divide by -2

y = 7

Add 7 into the equations:

3y + 4 + 5y - 10

3(7) + 4 + 5(7) - 10

21 + 4 + 35 - 10

25 + 25

50

4 0
3 years ago
Need help with this trigonometry word problem
kobusy [5.1K]

Answer:

86.6

Step-by-step explanation:



Here, AB represents height of the building, BC represents distance of the building from the point of observation.

In the right triangle ABC, the side which is opposite to the angle 60 degree is known as opposite side (AB), the side which is opposite to 90 degree is called hypotenuse side (AC) and the remaining side is called adjacent side (BC).

Now we need to find the length of the side AB.

tanθ  =  Opposite side/Adjacent side

tan 60°  =  AB/BC

√3  =  AB/50

√3 x 50  =  AB

AB  =  50√3

Approximate value of √3 is 1.732

AB  =  50 (1.732)

     AB  =  86.6 m

So, the height of the building is 86.6 m

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3 years ago
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Answer:

2+2=4 and my fave song is blood in the water

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3 years ago
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