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valentina_108 [34]
3 years ago
8

Plz help me i dont even know how to start this can u also explain how to do it much appretciated

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
4 0
Ok did your teacher say anything about not being able to use negative numbers or fractions? If not can you use fractions or negative numbers.
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Write an expression that can be used to multiply 6 times 198 mentally
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6*100
6*90
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5 0
3 years ago
If the ratio of radius of two spheres is 4:7, the ratio of their volume is?​
Kazeer [188]

Answer:

64 : 343

Step-by-step explanation:

First use the radii to find the volume

1) Radius of first sphere is 4 (taken from 4:7 ratio)

   Insert it into the equation for volume of a sphere: V=4 /3πr^3

   V = (4/3)(π)(4^3)

   V = (4/3)(π)(64)

   V = 256/3 π

   Volume of the first sphere = 256/3 π

2) Radius of the second sphere is 7 (also taken from 4:7 ratio)

   Insert it into the equation for volume of a sphere: V=4 /3πr^3

   V = (4/3)(π)(7^3)

   V = (4/3)(π)(343)

   V = 1372/3 π

   Volume of the second sphere = 1372/3 π

Next, calculate the ratio by dividing the two numbers

256/3 π ÷ 1372/3 π

Answer should be 64 : 343

The simple way to do this problem is to just cube the numbers:  

4:7 becomes 4^3 : 7^3 = 64 : 343

Either way works.

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3 years ago
Find (f°g)(x) f(x)=x^2-1, g(x)=3x-2
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F°g(x) = (3x-2)² -1
= 3x(3x-2)-2(3x-2) -1
= 9x² -6x-6x+2-1
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How would you graph 10<=20 on a number line graph
ValentinkaMS [17]

Answer:

you would put a point on 10 then an arrow up to 20

Step-by-step explanation:

7 0
3 years ago
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