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Ostrovityanka [42]
3 years ago
7

N+10 means a number_ by 10

Mathematics
1 answer:
dolphi86 [110]3 years ago
8 0
N+10 means a number multiplied by 10
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Three quantities x,y and z are connected so that x varies directly as z and inversely as the square root of y.If x=6 when z=12 a
stellarik [79]

Answer:

the expression is x= 2.5 * z/√y  

Step-by-step explanation:

since x is proportional to z and since x varies inversely as the square root of y

x= a * z/√y  

then

a = x*√y /z

replacing values

a = x*√y /z = 6*√25 /12 = 30/12 = 10/4=2.5

therefore

x= 2.5 * z/√y  

8 0
3 years ago
Read 2 more answers
The ratio of the perimeters of two similar triangles is 4:7. The sides of the larger triangles are 10, 12, and 13cm,
rjkz [21]

Answer:

Perimeter = 20cm

The perimeter is 35 for the larger triangle = 7:4 ratio

the perimeter for the smaller triangle = 4:7 ratio

We add up 4+7 = 11 and multiply 35 x 2 = 70.

so that the smaller triangle = 40  = 40:70

35 = 7 and 20 = 4

To find measurements of 20

we have any number over 10 combined will make the smaller sides possible,

Where hypotenuse would be under 10.

H = 6.5 Sides = 6 + 5 does not add up to 20

H = 9 Sides = 7 + 4  does have near equal spaced symmetry.

H = 9  Sides = 5 + 6  is wrong as no symmetry in measure

H = 8  Sides = 7 + 5 is wrong as no symmetry in measure

H = 7 Sides = 6 + 7  is wrong as equal sides

H = 6 sides = 6.5 + 6.5 is wrong as equal sides

H = 11 Sides = 6 + 3 is wrong has no symmetry.

The measurements must be 9cm, 7cm and 4 cm for the smaller triangle

The perimeter adds up to 20cm.    

7 0
4 years ago
An alloy is composed of nickel, zinc, and copper in a ration of 7:2:9. How many kilograms of each metal are needed to make 3.6kg
motikmotik
Well, the short answer is, we divide that 3.6 by (7+2+9) and then we give as many pieces at the ratio to each, so let's do so,

\bf \stackrel{nickel}{7}~~:~~\stackrel{zinc}{2}~~:~~\stackrel{copper}{9}
\\\\\\
\stackrel{nickel}{7\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{zinc}{2\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{copper}{9\cdot \frac{3.6}{7+2+9}}
\\\\\\
\stackrel{nickel}{7\cdot 0.2}~~:~~\stackrel{zinc}{2\cdot 0.2}~~:~~\stackrel{copper}{9\cdot 0.2}
\\\\\\
\stackrel{nickel}{1.4}~~:~~\stackrel{zinc}{0.4}~~:~~\stackrel{copper}{1.8}
6 0
3 years ago
Read 2 more answers
Convert each proper fraction into a mixed number or whole number
Dennis_Churaev [7]
You need to convert it into a whole number
7 0
4 years ago
X – 7y + x + y answer
Pachacha [2.7K]

Answer:

2x - 6y

Step-by-step explanation:

Combine like terms

(x) - 7y + (x) + y

2x - 7y + y

Combine like terms again

2x - (7y) + (y)

2x - 6y

Hope this helps!

4 0
3 years ago
Read 2 more answers
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