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3 years ago

8

Please help! - Due Today

1 answer:

Dmitriy789 [7]3 years ago

4 0

To explain it in words say. “The answer is 2 because you would first multiply the negative on the inside of the parentheses by the 2 which would give you - (-2). Next, you would multiply the negative on the outside of the parentheses by the -2 inside the parentheses which would give you the answer of 2 because a negative times a negative is a positive.”

I hope this is a good enough explanation.

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Tcecarenko [31]

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2 years ago

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How do i write log 4^2=16 in logarithmic form

ohaa [14]

Log16 4 = 2
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3 years ago

Jason decided to look at new trucks. Jason found a used truck for 34,000 dollars. A new truck is 40,000 dollars so what percent

nexus9112 [7]

Answer:

Percent of rise of a new truck on a used truck = 15%

Step-by-step explanation:

Let x be the percentage of saved money if Jason buying a used truck.

Given:

Price of the used truck = $34,000

Price of the new truck = $40,000

We need to find the percent of rise Jason saves on a used truck rather than buying a new truck

Solution:

Using a percentage formula.

$percentage\ cost = \frac{(100-x)}{100}\times Original\ cost$

Substitute Percentage cost = 34,000 and Original cost = 40,000 in above formula.

$34000 = \frac{(100-x)}{100}\times 40000$

$34000 = (100-x)\times 400$ ( $\frac{40000}{100}=400$ )

Using cross multiplication rule.

$(100-x)=\frac{34000}{400}$

$85=100-x$

$x = 100-85$

x = 15%

Therefore, Jason used 15% rise of a new truck for a used truck.

6 0

3 years ago

Serga [27]

Answer:

collect like terms

4x+10-10=32-10

4x=12

4\4x=12/4

x=3

5 0

1 year ago

In order for a vaccine to be effective, it should reduce a person's chance of acquiring a disease. Consider a hypothetical vacci

Dmitrij [34]

Answer:

Step-by-step explanation:

Let assume that Suppose the chance of contracting malaria is 10% for those who are not vaccinated ; (since the value) is not given.

Thus;

If the vaccine has no effect, risk of malaria for vaccine and no vaccine are equal to 0.1

Probability of not getting malaria if vaccinated or no vaccinated = 1 - 0.1 = 0.9

Malaria No Malaria Total

Vaccinated 100 * 0.1 = 10 100 * 0.9 = 90 100

No Vaccine 200 * 0.1 = 20 200 * 0.9 = 180 300-100 = 200

Total 20 + 10 = 30 90 + 180 = 270 300

If the vaccine cuts the risk by half, risk of malaria for vaccinated are equal to 0.1/2 = 0.05

Probability of not getting malaria if vaccinated = 1 - 0.05 = 0.95

Malaria No Malaria Total

Vaccinated 100 * 0.05 = 5 100 * 0.95 = 95 100

No Vaccine 200 * 0.1 = 20 200 * 0.9 = 180 300-100 = 200

Total 20 + 5 = 25 90 + 180 = 275 300

3 0

3 years ago