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Alinara [238K]
3 years ago
12

Please answer this thank you

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

Step-by-step explanation:

option 1

option 3

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Twice a number (x) is less than 10
Wewaii [24]
2x < 10

Solving:

Divide each side by 2

x < 5

Hope this helps!
5 0
3 years ago
If the total surface area of a solid hemisphere is 462 cm2, find its volume.
kramer

Answer:

Step-by-step explanation:

here

total surface area(TSA)= 462 cm²

TSA=3πr²

462 = 3*22/7*r²

462*7=66r²

3,234=66r²

3,234/66=r²

49=r²

√(49=r

r=7

therefore the radia of the hemisphere is 7

now,

volume of hemisphere(V) = (2/3)πr²

V=(2/3)*(22/7)*7²

V=44*7

V=308

4 0
2 years ago
Read 2 more answers
Pretty simple easy 18 points
liq [111]

Answer: B and D  are the equIvalent expression.

Step-by-step explanation:

A is not the same because  2/5 is not the same as  -2/5

C is not the same because  4/3p is not the same as -4/3p  

D is not the same because they are both positive values instead of negative values.

7 0
3 years ago
An object is traveling at a steady speed of 8 2/3 miles per hour. How long will it take the object to travel to 5 1/5 miles If t
yan [13]

Answer:

3/5 hour

4 1/3 miles per hour

6 1/15 miles per hour

Step-by-step explanation:

Given that the object is travelling at a steady speed of 8 2/3 miles per hour and covers  5 1/5 miles

Recall that distance  = speed * time

hence

5 1/5 miles =  8 2/3 miles per hour * time t

26/5 = 26/3 * t

Multiply both sides by 3/26

26/5 * 3/26 = t

t = 3/5 hour

If the object reduces its speed by 1/2, the new speed

= 1/2 * 8 2/3 miles per hour

= 1/2 * 26/3

= 13/3 miles per hour

= 4 1/3 miles per hour

If the object reduces its speed by 30%, the new speed

= 8 2/3 miles per hour - 30% * 8 2/3 miles per hour

= 0.7 * 8 2/3 miles per hour

= 7/10 * 26/3

= 91/15

= 6 1/15 miles per hour

7 0
3 years ago
How do you solve (4x_____)-(1+8x2)=3 help please
Otrada [13]
Remember you can do anything to an equation as long as you do it to both sides

pemdas
first, subsitue z for the blank
(4z)-(1+8x2)=3
simplify
(4z)-(1+16)=3
(4z)-(17)=3
4z-17=3
add 17 to both sides
4z+17-17=3+17
4z+0=20
4z=20
divide both sides by 4
4z/4=20/4
1z=5
z=5
the blank is 5
3 0
3 years ago
Read 2 more answers
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