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irga5000 [103]
3 years ago
10

Evaluate expression (5x)/9y )-1 when x =-8 and y=9

Mathematics
1 answer:
bazaltina [42]3 years ago
7 0

Answer:

(5x/9y)-1

(5×-8/9×9)-1

(-40×9/9)-1

(-360/9)-1

-40-1

-41

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10 points
shtirl [24]

Answer:

Step-by-step explanation:

So eat taco is 2.74 and he bought 9 so now you know the tacos price. It time for the coffees price you are going to divide 22.27 and 4 and youll get your answer

5 0
3 years ago
Determine the value(s) of k such that the system of linear equations has the indicated number of solutions. (Enter your answers
Ratling [72]

Answer:

k=3

Step-by-step explanation:

The given system of equations are

9x+ky=24

kx+y=8

We need to find the value of k if the given system of equation have infinite number of solutions.

If two equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 have infinite number of solutions, then

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}

Using this we get

\dfrac{9}{k}=\dfrac{k}{1}=\dfrac{-24}{-8}

\dfrac{9}{k}=\dfrac{k}{1}=3

\dfrac{k}{1}=3

k=3

Therefore, the value of k is 3.

8 0
3 years ago
Mr. Doyle mowed 2\5ths of his lawn. His son mowed 1\3rd of it. Who mowed most of the lawn? How much of the lawn still needs to b
kondor19780726 [428]

Answer:

Step-by-step explanation:

Dad:  2/5

Son:  1/3

<u>Who mowed most of the lawn? </u> Dad, of course.  2/5 is larger than 1/3.  2/5 is 40% and 1/3 is 33.333%

<u>How much of the lawn still needs to be mowed?  </u>

 2/5 + 1/3 + X = 1  [1 means the whole lawn.  X is the remaining portion.]

6/15 + 5/15 + X = 1   [Convert each fraction so that they have a com,mon denominator.  This also shows that 2/5 (6/15) is larger than 1/3 (5/15).

11/15 + X = 1

X = 1 - 11/15

X = 4/15 left to be mowed.

<u>How much does Mr. Doyle have left to mow?</u>

We'll assume each rate is the same, 2/5 for Dad and 1/3 for son.

4/15 left to be mowed.

Dad will mow 2/5 of 4/15, so (2/5)*(4/15) = 8/75 left of the original yard

Son will mow 1/3 of 4/15, so (1/3)*(4/15) = 4/45 left of the original yard

3 0
2 years ago
I need help on that, please and thank you. ​
Darya [45]
The correct answer is A
6 0
3 years ago
Read 2 more answers
Pls help <br> And explain how you got your answer
frosja888 [35]

2000x5x400÷100=40000

8 0
3 years ago
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