All of the following are equivalent, except _____.

Mathematics

2 answers:

earnstyle [38]3 years ago

8 0

The correct answer would be b) (12 + 3x)x

8_murik_8 [283]3 years ago

5 0

All are equivalent except for b - because 12 * x = 12x but 3x * x becomes 3x^2. <span />

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A jar containing only dimes and quarters contains a total of 54 coins. The value of all the coins in the jar is $9.15. Solve by

Paladinen [302]

Answer: the jar contains 29 dimes and 25 quarters.

Step-by-step explanation:

The worth of a dime is 10 cents. Converting to dollars, it becomes

10/100 = $0.1

The worth of a quarters is 25 cents. Converting to dollars, it becomes

25/100 = $0.25

Let x represent the number of dimes contained in the jar.

Let y represent the number of quarters contained in the jar.

A jar containing only dimes and quarters contains a total of 54 coins.. This means that

x + y = 54

The value of all the coins in the jar is $9.15. This means that

0.1x + 0.25y = 9.15 - - - - - - - - - - - 1

Substituting x = 54 - y into equation 1, it becomes

0.1(54 - y) + 0.25y = 9.15

5.4 - 0.1y + 0.25y = 9.15

- 0.1y + 0.25y = 9.15 - 5.4

0.15y = 3.75

y = 3.75/0.15 = 25

x = 54 - y = 54 - 25

x = 29

7 0

3 years ago

What is the value of the underlined digits? 588_7, 6.409_7, 8.41_3, _0,184,843

irga5000 [103]

The first on is the tenth place
the second one is the tenth place
the third one is the tenth place
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3 0

3 years ago

Read 2 more answers

On the circle below, tangent line BC¯¯¯¯¯ is constructed by striking an arc from point D that intersects circle A at point B. Th

weqwewe [10]

Answer:

$\huge\boxed{BD = 12\ units}$

Step-by-step explanation:

If AB = 5 , then AE = 5 [Radii of the same circle]

So,

AC = AE + EC

AC = 8+5

AC = 13 units

Now, Using Pythagorean theorem to find the missing side i.e. BD because tangent strikes the circle at 90 degrees making the triangle a right angled triangle

$c^2=a^2+b^2$