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Juliette [100K]
4 years ago
7

On a standardized test raw answer the first 22 questions in 5 minutes there are 77 questions on the test if he continues to answ

er questions at the same rate how long will it take him to complete the test from start to finish
Mathematics
2 answers:
svetlana [45]4 years ago
8 0
Hello!

If you answered 22 questions on the test in 5 minutes, there will be an unequal time amount. 22 x 3 = 15 minutes (66 questions) 22 x 4 = 20 minutes (88 questions).
Therefore, it would take you 17.5 minutes to finish all the questions on your test.
Enjoy.
kodGreya [7K]4 years ago
6 0

Answer:

Step-by-step explanation:

17.5

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Question Progress
ddd [48]

Answer: 1/250

Step-by-step explanation:

Given the recurring decimal : 0.004

Firstly:

Let x = 0.004 - - - (1)

Due to the number of decimals places and value of x;

We multiply (1) by 1000 to obtain an integer

Multiply (1) by 1000

1000x = 4 - - - (2)

From (2) we can solve for x and leave our answer as a fraction.

Divide (2) by 1000 to obtain the value of x

1000x / 1000 = 4 / 1000

x = 1 / 250

Recall x = 0.004

Therefore, x = 0.004 = 1/250

5 0
3 years ago
In a class, 1/7 of the time is spent on Mathematics, 2/21 on English and 1/14 on games. What fraction of the time is spent on AL
likoan [24]

Answer:

5/21

Step-by-step explanation:

1/7 + 2/21 = ?

lcd of 7 and 21 is 21 so;

( 2/21 x 1/1) + 1/7 x 3/3) = 5/21

3 0
2 years ago
Use algebra to solve 3x+4 = 1/x<br> The exact solutions are x=<br> Х
skad [1K]

Answer:

Ignore the A before the ±, it wouldn't let me type it correctly.

x=\frac{2±\sqrt{7}  }{3}

Step-by-step explanation:

3x + 4 = 1 ÷ x

3x + 4 - 4 = 1 ÷ x - 4

3x = 1 ÷ x - 4

3x=\frac{1}{x} +\frac{x(-4)}{x}

3x=\frac{1+x(-4)}{x}

3x=\frac{1-4x}{x}

x(3x)=x(\frac{1-4x}{x})

x · 3x = - 4x + 1

3x² = - 4x + 1

3x² - (- 4x + 1) = 0

3x² + 4x - 1 = 0

Ignore the A before the ±, it wouldn't let me type it correctly.

x=\frac{-b±\sqrt{b^{2}-4ac } }{2a}

a = 3

b = 4

c = - 1

x=\frac{-4±\sqrt{4^{2}-4((3)(-1)) } }{2(3)}

x=\frac{-4±\sqrt{16-4((3)(-1)) } }{2(3)}

x=\frac{-4±\sqrt{16+12 } }{2(3)}

x=\frac{-4±\sqrt{28 } }{2(3)}

x=\frac{-4±\sqrt{(2)(14) } }{2(3)}

x=\frac{-4±\sqrt{(2)(2)(7) } }{2(3)}

x=\frac{-4±\sqrt{2 } \sqrt{2}\sqrt{7}  }{2(3)}

x=\frac{-4±2\sqrt{7}  }{2(3)}

x=\frac{-4±2\sqrt{7}  }{6}

Two separate equations

x=\frac{-4+2\sqrt{7}  }{6}

x=\frac{2+\sqrt{7}  }{3}

x=\frac{-4-2\sqrt{7}  }{6}

x=\frac{2-\sqrt{7}  }{3}

7 0
3 years ago
Kite ABCD (a quadrilateral with two pairs of adjacent equal sides) has coordinates A\(0,7), B (1,0),\ C (12,-2), and D (7,8). Wh
Drupady [299]

Answer:

Area=45

Step-by-step explanation:

Area=AC*BD/2=V12^2+(-9)^2*V6^2+8^2=(V144+81)*V36+64/2=V225*6/2=15*6/2=45

8 0
3 years ago
The width of a rectangle room is 80 percent of its length. WHat is the area of the room?
deff fn [24]

Answer:

180 squared ft

Step-by-step explanation

80% = 80/100 = 40/50  =    4/5

L = 15

W= 4/5 of 15 = 12

Area = LxW

Area = 15x12 = 180 squared ft

6 0
3 years ago
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