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Alexandra [31]
3 years ago
9

​Determine whether the proportion is true or false. 15/20=14/18

Mathematics
2 answers:
Colt1911 [192]3 years ago
7 0

Answer:

Step-by-step explanation:

note :

a/b = c/d  means : ad = bc

comparing : 15×18   and 14×20

15×18=270   and  14×20 = 280

conclusion : 15/20=14/18 is false

11111nata11111 [884]3 years ago
3 0
15/20 can be simplified down to 3/4

14/18 can be simplified down to 7/6

Comparing the two simplified forms, they do NOT equal each other, so the proportion would be false
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miskamm [114]

The volume of a cuboid is = length × width × height.

Let the width  of Olivia's lunch box be 'x'.

Hence the length of Olivia's lunch box shall be 'x + 2'

Also the height of the box is given as 3 inches.

The volume of the box is 240 in³

Substituting in the formula we get

x(x+2)(3) =240

Dividing by 3 on both sides

x(x+2)=80

Exapnding we get

x^2+2x=80

Subtracting 80 from both sides

x^2+2x-80=0

Factoring

(x+10)(x-8)=0

We get

x= -10  or x = 8

But x cannot be negative

So x = 8

Hence the width of the box is 8 inches.

7 0
4 years ago
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Glven: PA = PC and BA = BC. Use the diagram to find the length described.Suppose PA = 34 cm and PB = 16 cm. What is the length o
Mashutka [201]

We can calculate the length of AB using the Pythagorean Theorem, where:

PA^2=AB^2+PB^2

So, replacing PA by 34 and PB by 16 and solving for AB, we get:

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Then, AC = AB + BC, But AB = BC, so:

AC = 2*AB

Replacing AB by 30, we get:

AC = 2*30 = 60

Answer: AC=60

8 0
1 year ago
Kate can mow at a constant rate of 4/5 lawns per hour. what is the ratio of lawns per hours?
Softa [21]

Answer:

4 : 5

Step-by-step explanation:

Kate can mow at a constant rate of 4/5 lawns per hour.

So, we can represent this in the following manner:

Kate can mow 4 lawns in an interval of  5 hours at a constant rate.

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Therefore, the ratio of lawns per hour is 4 : 5. ( Answer )

3 0
3 years ago
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disa [49]
Solve the rational equation by combining expressions and isolating the variable x.
x = 1/5
Hope this helps! :)
7 0
3 years ago
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What is the LCM of 120 and 20
ankoles [38]
The lcm of 120 and 20 is 120!

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3 years ago
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