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max2010maxim [7]
4 years ago
11

1:2=n:9. Can someone show me the answer

Mathematics
2 answers:
Dahasolnce [82]4 years ago
6 0

Answer:

n = 4.5

Step-by-step explanation:

1              n

------= ------------

2            9

using cross products

1 * 9 = 2 * n

divide each side by 2

9/2 = 2n/2

9/2 = n

n = 4.5

pantera1 [17]4 years ago
5 0
A: n=4.5

1/2 n/9

2×x=9
2×4.5=9

1×4.5=4.5

So n=4.5
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Find three rational numbers between 1 and 0.​
Alex73 [517]

Answer:

1/2, 1/4 & 3/4

Step-by-step explanation:

mean of 0 &1 is\frac{0+1}{2} =\frac{1}{2} \\

mean of 0 and 1/2 is (0+\frac{1}{2} )/2=\frac{1}{2} /2=\frac{1}{2} *\frac{1}{2} =\frac{1}{4}

mean of 1/2 and 1 is (\frac{1}{2} +1)/2=\frac{3}{2} /2=\frac{3}{2} *\frac{1}{2} =\frac{3}{4}

So the three rational numbers are 1/2, 1/4 & 3/4

4 0
3 years ago
Every counting number is a rational number true or false
ra1l [238]
<h3>Answer:  True</h3>

Reason:

The counting numbers, aka the set of natural numbers, is the set {1, 2, 3, 4, 5, ...} which is the set of positive integers

A value like 5 is the same as 5/1, which shows it is rational.

A rational number is any fraction of two whole numbers (eg: 2/3 and 4/7). The denominator cannot be zero.

Since we can rewrite the 5 as 5/1, it can be done with any counting number to show the natural numbers is a subset of the rational numbers.

Any counting number is rational, but not the other way around.

6 0
2 years ago
Berta worked to solve a system of equations. 4x + y = –5 x – y = –5 Step 1: ??? Step 2: x = –2 Step 3: 4(–2) + y = –5 Step 4: –8
Lemur [1.5K]
5x= -10
I hope I could help.

7 0
3 years ago
Read 2 more answers
(a) Suppose a car is traveling north on “a” street and turns left onto Main Street. Which angle is this (angle number from pictu
Westkost [7]

Answer:

Traffic traveling north on Main Street must make a 125° turn onto the new road. This is the angle between where the traffic was originally headed and where it is headed after it makes the turn. Traffic on 2nd Street is traveling south, the opposite direction.

3 0
3 years ago
You have a 1200-foot roll of fencing and a large field. you want to make two paddocks by splitting a rectangular enclosure in ha
romanna [79]
Let width = w
Let length = l
Let area = A
3w+2l=1200
2l=1200-3w
l=1200-3/2
A=w*l
A=w*(1200-3w)/2
A=600w-(3/2)*w^2
If I set A=0 to find the roots, the maximum will be at wmax=-b/2a which is exactly 1/2 way between the roots-(3/2)*w^2+600w=0
-b=-600
2a=-3
-b/2a=-600/-3
-600/-3=200
w=200
And, since 3w+2l=1200
3*200+2l=1200
2l = 600
l = 300
The dimensions of the largest enclosure willbe when width = 200 ft and length = 300 ft
check answer:
3w+2l=1200
3*200+2*300=1200
600+600=1200
1200=1200
and A=w*l
A=200*300
A=60000 ft2
To see if this is max area change  w and l slightly but still make 3w+2l=1200 true, like
w=200.1
l=299.85
A=299.85*200.1
A=59999.985
8 0
4 years ago
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