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Elden [556K]
3 years ago
12

The sum of a number and 9 is 21. Find the number.

Mathematics
2 answers:
lbvjy [14]3 years ago
8 0

Answer:

12..........................

MArishka [77]3 years ago
5 0

Answer:

12

Step-by-step explanation:

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Clem Shirestock is at a dock on a bank of a straight river that is 1 mile wide and wants toreach the barge toll gate on the othe
oee [108]

The total time taken by Clem Shirestock to reach the gate is given by the  equation 7 = 4√(x²+1)+ 8 - 2 x

Let the point P is at a distance of x miles from the toll gate.

Hence when Clem reaches the point P he rows in the form of right angled triangle. and we know that the width of the river is 1 mile.

So by using Pythagoras Theorem we can infer that the distance covered by Clem is the hypotenuse which is equal to √(x²+1).

Time taken to complete this route is  4√(x²+1) .

Now  he has only to walk 4-x distance along the river.

His speed is 2 mph

Time taken = 2(4-x) = 8-2x

Hence we can conclude that the total time is 7 hours. so the equation to represent this is 7 = 4√(x²+1)+ 8 - 2 x .

to learn more about time visit:

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3 0
1 year ago
Answer by sunday plz!!
pentagon [3]

Answer:

y=3*x

Step-by-step explanation:

john bought 3 notebooks for 9 dollars

so 9/3=3

notebooks costed 3 dollars each

x-number of notebooks

y-cost of notebooks

so

y=3*x

because 3 dollar cost every notebook you could buy.

if i buy 2 notebooks

so x=2

y=3*2=6 dollars

if I buy 3 notebooks

then y=3*3=9 dollars

end this way continues

8 0
3 years ago
Read 2 more answers
If this was a belo plan with a pay rate of $22.00 per hour and a maximum of 53 hours, how much would overwood be paid for 48 hou
mamaluj [8]

Ignore the "53 hours" part, since we're interested only in the pay for 48 hours.

($22/hr)(48 hrs) = $1,056 in total pay.

5 0
4 years ago
which of the following is a trinomial with a constant term? A. x3 +y B. x+2y +10 C. y6 + 8y3 +64y D. ×​
kiruha [24]

Answer:

The answer to your question is: letter B

Step-by-step explanation:

Constant term is a number alone that is not together with a variable.

Options

A. x3 +y                        There are 2 variables, and zero constant numbers

B. x+2y +10                   Number 10 is a constant

C. y6 + 8y3 +64y         This trinomial do not have any constant

D. ×​                                Letter x is a variable not a constant

4 0
3 years ago
This is Due tomorrow can someone please help
bogdanovich [222]
Its c!!! Because of math
5 0
3 years ago
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