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Anna35 [415]
3 years ago
15

Solve the equation 7z=105

Mathematics
1 answer:
zmey [24]3 years ago
4 0
The answer is 15 because u divide 7 on both sides
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The number of Apple iPods sold in 2009 was 54.13 million. That number decreased approximately linearly to 26.38 million iPods so
AleksandrR [38]

Answer:

A(t) = -6.9375t + 81.88 is the amount, in millions, for the number of Apple iPods sold in t years after 2005.

Step-by-step explanation:

Linear function:

A linear function has the following function:

y = mx + b

In which m is the slope(the value that y changes by when x changes by 1) and b is the y-intercept(the initial value of the output).

Finding the value in 2005:

This is b.

The number of Apple iPods sold in 2009 was 54.13 million. That number decreased approximately linearly to 26.38 million iPods sold in 2013.

So in 4 years, it decreased from 54.13 - 26.38 = 27.75 million.

So the value in 2005 should also be 27.75 million more than in 2009, that is 54.13 + 27.75 = 81.88. So

y = mx + 81.88

Using A for y and t for x

A(t) = mt + 81.88

Finding the slope:

When we have two points, the slope is given by the change in the output divided by the change in the input.

In 4 years, the amount decrease by 27.75 million. So

m = -\frac{27.75}{4} = -6.9375

So

A(t) = -6.9375t + 81.88 is the amount, in millions, for the number of Apple iPods sold in t years after 2005.

6 0
3 years ago
Plz help! I don’t understand this
kiruha [24]

Answer:

Option B

Step-by-step explanation:

-1/2x≥4

1) Multiply both sides of the inequality by the reciprocal of -1/2: (-2)

x≤-8

Graph x≤-8 as a line. Remember that lesser negative values go to the left!

ALSO don't forget when you multiply both sides of an inequality by a negative number the inequality sign flips.

5 0
3 years ago
Tell whether the sequence is arithmetic. If it is, what is the common difference?
Kay [80]
The answer to your question is C


 
4 0
3 years ago
Read 2 more answers
Which expression is NOT equivalent to 6 x 14?
meriva

Answer:

The correct answer is D

Step-by-step explanation:

since 6*14=84, if you solve all the equations, the one that is incorrect is D

7 0
2 years ago
Read 2 more answers
Snow Crest is 11,990.21 feet higher than Mt. Wilson. Write and solve an equation to find the elevation of Mt. Wilson. Let x repr
Nata [24]

Answer:

The elevation of Mt. Wilson is 16,160.10 ft

Step-by-step explanation:

Let

x-----> represent the elevation of Mt. Wilson

y ----> represent the elevation of Snow Crest

we know that

y=x+11,990.21 ----> linear equation that represent this situation

we have that

y=28,150.31 ft ----> see the attached figure

substitute in the linear equation and solve for x

28,150.31=x+11,990.21

x=28,150.31-11,990.21=16,160.10 ft

6 0
3 years ago
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