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serg [7]
3 years ago
10

What is the value of 4x-7 when x=4? 1 9 16 23

Mathematics
2 answers:
serious [3.7K]3 years ago
7 0

Answer:

9

Step-by-step explanation:

4x-7

4(4)-7

16-7

9

RideAnS [48]3 years ago
5 0

4x-7\Longrightarrow4\cdot4-7=16-7=9

Hope this helps.

r3t40

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PLEASE HELP ILL GIVE BRAINLEIST
Ede4ka [16]

Answer:

$427.72

Step-by-step explanation:

32/100×$629

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$629-$201.28

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or

100-32

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68/100×$629

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6 0
3 years ago
A boat has a speed of 15 mph in still water. It travels downstream from Greentown to Glenavon in g hours. It then goes back upst
Lerok [7]

Step-by-step explanation:

We want to find two things-- the speed of the boat in still water and the speed of the current.  Each of these things will be represented by a different variable:

B = speed of the boat in still water  

C = speed of the current

Since we have two variables, we will need to find a system of two equations to solve.

How do we find the two equations we need?  

Rate problems are based on the relationship Distance = (Rate)(Time).


Fill in the chart with your data (chart attached)

The resulting speed of the boat (traveling upstream) is B-C miles per hour.  On the other hand, if the boat is traveling downstream, the current will be pushing the boat faster, and the boat's speed will increase by C miles per hour.  The resulting speed of the boat (traveling downstream) is B+C miles per hour.  Put this info in the second column in the chart.  Now plug it into a formula! <u>Distance=(Rate)(Time) </u>Now solve using the systems of equations!

6 0
3 years ago
A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess
statuscvo [17]
Let's start by visualising this concept.

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We can see that it starts to form a geometric sequence, with the common ratio being 2.

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T_n = ar^{n - 1}
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Thus, there are 16, 384 grains on the fifteenth square.

The second question begs the same process, only this time, it's a summation. Using our sum to n terms of geometric sequence, we get:
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S_{15} = 2^{15} - 1 = 32767

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6 0
3 years ago
Read 2 more answers
You need to write an essay that has at least 500 words. You have written 285 words so far. Write and solve an inequality that re
BabaBlast [244]

Answer:

The minimum number of words left to write is 215

Step-by-step explanation:

Let

w -----> the number of words left to write

we know that

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Remember that the word "at least" means "greater than or equal to"

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Solve for w

Subtract 285 both sides

w\geq 500-285\\w\geq 215

The minimum number of words left to write is 215

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3 years ago
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