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sergey [27]
3 years ago
5

Please help, lots of points and will mark brainliest! :)

Mathematics
1 answer:
Anna71 [15]3 years ago
8 0

Answer:

1) -4

2) 2/3

Step-by-step explanation:

1) f(x)=x+4

*subtract 4 to both sides

x=-4

2) f(x)=3x-2

*add 2 to both sides then divide by 3*

x= 2/3

hope this helps :)

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Can anyone help me please 3t-1/4=7/8
julsineya [31]
3t − 1/4 = 7/8

Add 1/4 to both sides.

3t + −1/4 + 1/4 = 7/8 + 1/4

3t = 9/8

Divide both sides by 3.

3t/3 = 98/3

t=3/8

3 0
3 years ago
Is the following an example of simple random, cluster, systematic or convenience sampling?
yanalaym [24]
The following is an example of a cluster sampling.

Cluster sampling<span> is a </span>sampling<span> technique used when "natural" but relatively heterogeneous groupings are evident in a statistical population. It is often used in marketing research. In this technique, the total population is divided into these groups (or </span>clusters) and a simple randomsample<span> of the groups is selected.</span>

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3 years ago
A 10-pound block of ice melts at a rate of 3% per hour. Find the weight of the block of ice after 1 day.
mylen [45]

Answer:

The weight of the block of ice after 1 day is of 4.81 pounds.

Step-by-step explanation:

Equation for exponential decay:

The equation that models an amount after t hours, subject to exponential decay, is given by:

A(t) = A(0)(1 - r)^t

In which A(0) is the initial amount and r is the decay rate, as a decimal.

A 10-pound block of ice melts at a rate of 3% per hour.

This means that A(0) = 10, r = 0.03

So

A(t) = A(0)(1 - r)^t

A(t) = 10(1 - 0.03)^t

A(t) = 10(0.97)^t

Find the weight of the block of ice after 1 day.

One day has 24 hours, so this is A(24).

A(24) = 10(0.97)^{24} = 4.81

The weight of the block of ice after 1 day is of 4.81 pounds.

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3 years ago
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3 years ago
Convert this fraction into a decimal.
Elena L [17]
The answer is 0.6 Explanation: Since it’s 6/10 the 6 goes n the tenths place.
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3 years ago
Read 2 more answers
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