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VARVARA [1.3K]
3 years ago
6

Solve each equation write each equation in simplest form 7x/8=21

Mathematics
1 answer:
AveGali [126]3 years ago
8 0
7x / 8 = 21
7x = 8*21
x = 24
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a shopkeeper buys coffee at 4.20 per kg and sells it at 63 cents per 100 g Calculate his profit percentage
Bingel [31]
420 cents for 1000 g. So 42 cents for 100 g (i crossed multiplied). %profit=63-42/42 *100=50%
7 0
3 years ago
If the dimensions of a pentagonal prism are quadrupled, then the surface area of the prism is multiplied by eight.
Lubov Fominskaja [6]

Answer:

false

Step-by-step explanation:

the relationship between lengths/dimensions and areas is that areas are created by multiplying 2 dimensions.

when you quadruple (×4) the dimensions, then the areas are growing with the square of the factor (×4×4 = ×16), because the factor goes twice into the multiplication : one time for every dimension involved.

so, quadrupling the dimensions would multiply the areas by 16.

8 0
3 years ago
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scZoUnD [109]
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3 0
3 years ago
Read 2 more answers
Findes the slope from two points<br> point 1=(4,5)<br> point 2=(6,9)
hoa [83]

Answer:

2

Step-by-step explanation:

The formula for findining slope it y2-y1/x2-x1

so 9-5=4/ 6-4=2

4/2 is 2

the slope is 2

6 0
4 years ago
A copy machine makes
IrinaK [193]
This problem can be represented in a formula with fractions. To make it more simple, we are converting 5m30s to just pure seconds, which = 154 copies in 330 seconds.

You set up the formula like this: 154/330 = x/60. (it is x/60 because you want to know the x amount of copies per 60 seconds)

Cross multiply, you get 330x = 9240. Divide both sides by 330, you get:

 x = 28 copies.

The final answer is 28 copies per minute
7 0
3 years ago
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