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AlladinOne [14]
3 years ago
15

HELP PLEASE! ANSWER 1 AND 2 THIS IS EXTREMELY IMPORTANT!!!!

Mathematics
1 answer:
Mrrafil [7]3 years ago
3 0

Answer:

c and b

Step-by-step explanation:

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A solid shape is made by joining two cones. Each cone has the same radius. One cone has The other cone has slant height = 2x rad
pshichka [43]

The given area of the shape of 57.8·π cm², and length of the slant sides

being a factor of the radius, gives the length of the radius as <u>3.4 cm</u>.

<h3>How can the length of the radius be calculated?</h3>

Given;

Radius of the two cones are equal.

Slant height of one cone = 2 × Radius

Slant height of the other cone = 3 × Radius

Surface area of the shape = 57.8·π cm²

The curved surface area of a cone = π·r·l

Required:

The radius of the cone.

Solution;

Surface areas of the cones are therefore;

π·r × 2·r, and π·r × 3·r

The total surface area is therefore;

π·r × 2·r + π·r × 3·r = 57.8·π

5·r²·π = 57.8·π

Which gives;

r² = 57.8 ÷ 5 = 11.56

r = √(11.56) = 3.4

  • The radius of the cones, r =<u> 3.4 cm</u>

Learn more about finding the surface area of 3-D shapes here:

brainly.com/question/15635229

8 0
2 years ago
100 points plz what is this geometry question i need this quick!is my write? I can’t get this wrong
Fittoniya [83]

39x - 11 = 17x + 6

Answer is A

3 0
3 years ago
The 90km/h bus runs between the two stations in 2 hours and 20 minutes.
AnnZ [28]

Answer:

1. <u>distance</u><u> </u><u>is</u><u> </u><u>2</u><u>1</u><u>0</u><u>k</u><u>m</u>

<u>2</u><u>.</u><u> </u><u>distance</u><u> </u><u>is</u><u> </u><u>1</u><u>6</u><u>3</u><u>•</u><u>3</u><u>k</u><u>m</u>

Step-by-step explanation:

<h2> <u>QN1</u><u>;</u></h2>

<h2> <u>STEP1</u><u>;</u></h2>

SPEED=DISTANCE÷TIME

90km/h= X ÷ 2 hrs and 20mins

<h2> <u>STEP2</u><u>;</u></h2>

CHANGE 20 MINS INTO HRS

1 hr = 60mins

<h2> x</h2>

? = 20mins

<u>2</u><u>0</u><u>m</u><u>i</u><u>n</u><u>s</u><u> </u><u>*</u><u> </u><u>1</u><u>h</u><u>r</u>= 1/3hr

60mins

<h2> <u>STEP3</u><u>;</u></h2>

Speed=distance÷time

90km/h= X ÷ 21/3

Distance= speed * time

X = 90km/h * 21/3hrs

<u>distance</u><u> </u><u>is</u><u> </u><u>2</u><u>1</u><u>0</u><u>k</u><u>m</u>

<h2><u>QN</u><u> </u><u>2</u><u>;</u></h2>

Speed=distance ÷

70km/h= X ÷ 21/3hrs

Distance=speed * time

X = 70km/h * 21/3hrs

6 0
2 years ago
6(2x - 11) + 15 = 3x + 12 Part A: Write the steps you will use to solve the equation, and explain each step. (6 points) Part B:
klio [65]
Multiply the 6 by 2x and 11 then you would add 15. You should then have on one side getting rid of the parenthesis 12x-51=3x+12. Add 51 and subtract 3x and you should get 9x=63. Then you would divide by 9 and get an answer of 7. To check you would plug 7 into the equation. 6(7•2-11)+15= 33 and 3•7 +12= 33
7 0
3 years ago
Divide partial quotient 308 divide by 4
Inessa [10]

Answer:

77 is the answer your welcome

6 0
3 years ago
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