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3 years ago

Are 4:7 and 3:5 proportional

Mathematics

2 answers:

Alborosie3 years ago

7 0

To solve you multiply 4x5=20 and 3x7=21. The numbers are not equal, so they are not proportional. (Hope this helps!)

Maksim231197 [3]3 years ago

7 0

Answer:

No they are not proportional.

Step-by-step explanation:

If you make the ratio into a fraction it looks like this

4/7 and 3/5

Now you cross multiply

4*5 and 3*7

Now you have 20 and 21

Those numbers are unequivelent

So they are not proportional

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6 0

2 years ago

Two times the sum of a number and 8 equals 4

zhuklara [117]

Answer:

8+4 is equal to 12

7 0

2 years ago

Assume that the readings at freezing on a batch of thermometers are Normally distributed with mean 0°C and standard deviation 1.

andre [41]

Answer:

$P_{60} = 0.254$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 0

Standard Deviation, σ = 1.00

We are given that the distribution of readings at freezing on a batch of thermometers is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find $P_{60}$

P(X<x) = 0.0600

We have to find the value of x such that the probability is 0.600

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 0}{1})=0.600$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 0}{1} = 0.254\\x = 0.254$

$\bold{P_{60} = 0.254}$

8 0

2 years ago

The length of the base of an isosceles triangle is x. The length of a leg is 3x-5. The perimeter of the triangle is 39. Find X.

frozen [14]

Answer:

x = 7

Step-by-step explanation:

In an isosceles triangle, both legs are always congruent. The length of one leg is given, and the other leg has to be the same. The perimeter of this triangle can be written as:

$x+(3x-5)+(3x-5)=39$