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Elena L [17]
2 years ago
14

Which of the following proportions is false? 10/25 = 40/100 24/30 = 20/25 18/48 = 20/50 25/45 = 75/135

Mathematics
1 answer:
Liono4ka [1.6K]2 years ago
3 0

Answer:

18/48=20/50 is wrong

Step-by-step explanation:

Because 18/48=37.5% and 20/50=40%

Hope it helps

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A Uber charges $3.50 for pick up and $0.40 per mile. The ride costs $7.50. How far did they travel?
barxatty [35]

Answer:

10 miles

Step-by-step explanation:

7.50 - 3.50= 4

4 divided by 0.40 = 10

7 0
2 years ago
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The ceiling of Katie’s living room is a square that is 15 ft long on each side. To decorate for a party, she plans to hang crepe
egoroff_w [7]

Answer:

<u><em>6</em></u> rolls because the total perimeter is 102 ft and five rolls is only 100 feet. So she needs <em><u>6</u></em> rolls.

Step-by-step explanation:

to find perimeter, add up all the side lengths.

so 15*4 (it's easier than 15+15+15...)

60 ft.

now we have to use Pythagorean's Theorum to find corner to corner.

so a^2+b^2=c^2

we have a and b

15^2+15^2=c^2

do the math...

225+225= 450

square root of 450=

21.213

double that because it's used twice (corner to corner and corner to corner)

42.426

now add it all up

42.426 + 60 = 102.426

we can round

102

20*5 = 100

so she needs 6

MY ORIGINAL ERROR WAS 5, BUT 5 TIMES 20 IS ONLY 80, SO THEREFORE 6 IS REQUIRED SO THERE IS ENOUGH TO COVER 102.

6 0
3 years ago
Which shows a set of figures that always possesses all these attributes?
Scilla [17]

Answer:

C

Step-by-step explanation:

Four right angles eliminates trapezoids.

Four right angles also eliminates any triangle

General quadrilaterals should be eliminated by the 4 right angles. If they have 4 right angles, the figure is not a general quadrilateral.

The answer is rectangles and squares.

5 0
2 years ago
Consider the following statement: The square of a prime number is not prime. (a) Write this as an if-then statement, using caref
Hitman42 [59]

The square of a prime number is not prime.

a) let x ∈ R, If x  ∈ {prime numbers}, then x^{2}∉{prime numbers}

there says that if x is a real and x is in the set of the prime numbers, then the square of x isn't in the set of prime numbers.

b) Prove or disprove the statement.

ok, if x is a prime number, then x only can be divided by himself. Now is easy to see that x^{2} = x*x can be divided by himself and x, then x*x is not a prime number, because can be divided by another number different than himself

7 0
3 years ago
Find the value of each power (1.2)^2
egoroff_w [7]

Answer:

1.44

Step-by-step explanation:

To solve this problem all you have to do is multiply the number in the parentheses the number of times the exponent is.

1.2 x 1.2 = 1.44

Hope this helps :)

3 0
3 years ago
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