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3 years ago

What is £40 increased by 20%

Mathematics

1 answer:

Sliva [168]3 years ago

6 0

40 * 20% is 8.

In total, 48, if you add them up.

Hope this helped,
-*Starry*

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Which procedure justifies whether Negative 3 x (5 minus 4) + 3 (x minus 6) is equivalent to Negative 12 x minus 6? The expressio

BlackZzzverrR [31]

Answer:

The expressions are not equivalent because Negative 3 (2) (5 minus 4) + 3 (2 minus 6) = negative 18 and Negative 12 (2) minus 6 = negative 30

Step-by-step explanation:

Apparently, we're trying to see if ...

-3(x)(5 -4) + 3(x -6) = -12(x) -6

by evaluating the expressions for x=2:

-3(2)(5-4) +3(2 -6) ?= -12(2) -6

-6 -12 ?= -24 -6

-18 ≠ -30 . . . . . . . . . shows expressions are not equivalent

This demonstration matches the one in the first choice:

The expressions are not equivalent because Negative 3 (2) (5 minus 4) + 3 (2 minus 6) = negative 18 and Negative 12 (2) minus 6 = negative 30

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4 years ago

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Well to figure this out you must first multiply 9x2 which equals 18. Now you subtract 18-6 which equals 12. Rachael scored 12 points

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3 years ago

Write a numerical expression that represents the quotient of 85 minus 7 and 19

disa [49]

Answer:

85-7-19 or 85-26

Step-by-step explanation:

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3 years ago

Find the length of the diagonal of a square who sides are 18 inches

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The correct answer is d≈25.46

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3 years ago

The proportion of traffic fatalities resulting from drivers with high alcohol blood levels in 1982 was approximately normally di

SSSSS [86.1K]

Answer:

a) The proportion of states would you expect to have more than 65% of their traffic fatalities from drunk driving is 0.59518.

b) The 25th percentile of this distribution is a 0.5231 proportion of deaths due to drunk driving.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by

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

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the percentile of this measure.

In this problem, we have that:

Mean 0.569 and standard deviation 0.068. So $\mu = 0.569, \sigma = 0.068$

a. What proportion of states would you expect to have more than 65% of their traffic fatali- ties from drunk driving?

This is the value of X when Z has a pvalue of 0.65.

Z has a pvalue of 0.65 between $Z = 0.38$ and $Z = 0.39$ . So, we use $Z = 0.385$

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

$0.385 = \frac{X - 0.569}{0.068}$

$X - 0.569 = 0.068*0.385$

$X = 0.59518$

The proportion of states would you expect to have more than 65% of their traffic fatalities from drunk driving is 0.59518.

b. What proportion of deaths due to drunk driving would you expect to be at the 25th percentile of this distribution?

This is the value of X when Z has a pvalue of 0.25.

Z has a pvalue of 0.65 between $Z = -0.67$ and $Z = -0.68$ . So, we use $Z = -0.675$

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

$-0.675 = \frac{X - 0.569}{0.068}$

$X - 0.569 = 0.068*(-0.675)$

$X = 0.5231$

The 25th percentile of this distribution is a 0.5231 proportion of deaths due to drunk driving.

3 0

3 years ago