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dmitriy555 [2]
2 years ago
7

It takes you 45 minutes to wash a car

Mathematics
2 answers:
tangare [24]2 years ago
6 0

Answer:

37.5 minutes

Step-by-step explanation:

45+30=75

=<u>7</u><u>5</u><u> </u>=37.5

2

This might help you!!!!

Ronch [10]2 years ago
4 0
Answer: 37. 5 minutes in total.

So someone else had gave the correct answer, but I thought it wasn’t clear enough so I hope this helps.

Step-by-step explanation:

45 + 30 = 75.

But 75 cannot be a total of minutes... so therefore we divide 75 by 2

75 ÷ 2 = 37. 5

So it will take you and your friend a total of 37. 5 minutes to wash a car together.


Hope this helped
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3. Find the values of the variables and the lengths of the sides of this kite.
Kazeer [188]

Answer:

So, the correct option is A. x = 9, y = 14 , Sides are 11 and 20

Step-by-step explanation:

P.S - the exact question is -

As given in the question ,

Side AB = Side AD

⇒y - 3 = x + 2

⇒y - x = 2 + 3 = 5

⇒y - x = 5                        .........(1)

Also, given

Side BC = Side CD

⇒2x + 2 = x + 11

⇒2x - x = 11 - 2

⇒x = 9

∴ equation (1) becomes

y - 9 = 5

⇒y = 5 + 9 = 14

⇒y = 14

∴ we get

x = 9, y = 14

Now,

as given ,

Side AB = y - 3

⇒ AB = 14 - 3 = 11

Side BC = 2x + 2

⇒ BC = 2(9) + 2 = 18 + 2 = 20

Side CD = x + 11

⇒ CD = 9 + 11 = 20

Side DA = x + 2

⇒DA = 9 + 2 = 11

∴ we get

The sides are 11 and 20

So,

The correct option is A. x = 9, y = 14 , Sides are 11 and 20

8 0
2 years ago
Solve: 7 x + 2 y = 16; -21 x-6 y = 24 Solve : 7 x + 2 y = 16 ; -21 x - 6 y = 24​
Marat540 [252]

Answer:

No solution

Step-by-step explanation:

<h3>Solving system of linear equations:</h3>

 7x + 2y = 16 ----------------(I)

-21x - 6y = 24 -----------------(II)

\sf \dfrac{a_1}{a_2}=\dfrac{7}{-21}=\dfrac{-1}{3}\\

\sf \dfrac{b_1}{b_2}=\dfrac{2}{-6}=\dfrac{-1}{3}

\sf \dfrac{c_1}{c_2} =\dfrac{16}{24}=\dfrac{2}{3}\\\\ \dfrac{a_1}{a_2}=\dfrac{b_1}{b_2} \neq  \dfrac{c_1}{c_2}

So, the lines are parallel and has no solution

7 0
1 year ago
What type of machine is a seesaw?
worty [1.4K]
A simple machine
hope this helped :)))
5 0
3 years ago
Read 2 more answers
State the ordered pair that is a solution to the system of equations graphed below. _
Yakvenalex [24]

Slope:

(2,2) (1,-3)

Answer:

(-2,1)

Step-by-step explanation:

8 0
2 years ago
Select the correct answer.
Burka [1]

The equation in which b varies directly as the <em>square</em> root of c is b = 50 · √c. (Correct choice: B)

<h3>What is the equation of the direct variation between two variables?</h3>

In this problem we have a case of <em>direct</em> variation between two variables, which is mathematically described by a <em>direct proportionality</em> model, whose form and characteristics are shown below:

b ∝ √c

b = k · √c      (1)

Where k is the <em>proportionality</em> constant.

First, we determine the value of the constant of proportionality by substituting on b and c and clearing the variable: (b = 100, c = 4)

k = b / √c

k = 100 / √4

k = 100 / 2

k = 50

Then, the equation in which b varies directly as the <em>square</em> root of c is b = 50 · √c. (Correct choice: B)

To learn more on direct variation: brainly.com/question/14254277

#SPJ1

7 0
1 year ago
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