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3 years ago

A rate in which the first quantity is compared to 1 unit of the second quantity

Mathematics

1 answer:

Ivan3 years ago

7 0

Answer:

it will compare unit to some quanlity to a different number of units of a different queality.

Step-by-step explanation:

a/b=c/d proportions are two fractions that are equal example: 1/2=2/4

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EASY POINTS AND PLEASE HELP ASAP!!! WILL MARK BRAINLIST! ;)

Evgesh-ka [11]

Step-by-step explanation:

$- 2(3x + 7) = 32 - 4x \\ distribute \\ - 2 \times 3x = - 6x \\ - 2 \times 7 = - 14 \\ - 6x - 14 = 32 - 4x \\ add \: 4x \: to \: both \: sides \\ - 6x + 4x = 32 - 4x + 4x \\ - 2x = 32 \\ divide \: by \: - 2 \\ \frac{ - 2x}{ - 2} = \frac{32}{ - 2} \\ \\ x = - 16$

$4x + y = 3 \\ y = - 4x + 3 \\ using \: point \: slope \: form \\ y - y1 = m(x - x1) \\ y + 6 = - 4(x + 4) \\ y + 6 = - 4x - 16 \\ y = - 4x - 22$

First equation: Your equation is given.

Second equation: Distribute by multiplying every number in the parentheses by the number outside it.

3rd equation: Combine like terms by adding 4x to both sides.

4th equation: Combine like terms by subtracting 14 from both sides.

5th equation: Divide both sides by -2, the coefficient of x.

3 0

3 years ago

What is the missing coefficient?

Afina-wow [57]

For this case we have the following expression:

$(15x ^ 2 + 11y ^ 2 + 8x) - (7x ^ 2 + 5y ^ 2 + 2x) =$

We eliminate the parentheses taking into account that:

$- * + = -\\15x ^ 2 + 11y ^ 2 + 8x-7x ^ 2-5y ^ 2-2x$

We add similar terms:

$15x ^ 2-7x ^ 2 + 11y ^ 2-5y ^ 2 + 8x-2x =$

Different signs are subtracted and the sign of the major is placed:

$8x ^ 2 + 6y ^ 2 + 6x$

Finally, the expression is reduced to:

$8x ^ 2 + 6y ^ 2 + 6x$

Answer:

$8x ^ 2 + 6y ^ 2 + 6x$

Option B

6 0

3 years ago

Read 2 more answers

Please help answer this

yuradex [85]

I think you can use cosine rule if only the lines that form the <52 are equal.

6 0

3 years ago

What is the value of 4 in the number 546 210

Komok [63]

Answer:

4 has value of 10,000 which ten thousand place value.

Step-by-step explanation:

Given number 546210

We have to find the value of 4 in given number 546210.

We write the given number in value form as ,

546210 = 5×100000 + 4× 10000 + 6 ×1000 + 2×100 + 10

in words it is written as

Here, 4 has value of 10,000 which ten thousand place value.

3 0

3 years ago

Read 2 more answers

A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.

yawa3891 [41]

Answer:

The probability is 0.003

Step-by-step explanation:

We know that the average $\mu$ is:

$\mu=500$

The standard deviation $\sigma$ is:

$\sigma=100$

The Z-score is:

$Z=\frac{x-\mu}{\sigma}$

We seek to find

$P(x800)$

For P(x>800) The Z-score is:

$Z=\frac{x-\mu}{\sigma}$

$Z=\frac{800-500}{100}$

$Z=3$

The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

$P(x>800)=0.15\%$

For P(x<200) The Z-score is:

$Z=\frac{x-\mu}{\sigma}$

$Z=\frac{200-500}{100}$

$Z=-3$

The score of Z = -3 means that 200 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

$P(x$

Therefore

$P(x800)=P(x800)$

$P(x800)=0.0015 + 0.0015$

$P(x800)=0.003$

6 0

3 years ago