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3 years ago

The ratio of Ds to As in the school was 4 to 72. If there were 1080 As in the school this term, how many Ds were there?

Mathematics

2 answers:

Vika [28.1K]3 years ago

3 0

Answer:

Step-by-step explanation:

1080/72 *15 = number if Ds

Ad libitum [116K]3 years ago

3 0

Answer:

60 D's

Step-by-step explanation:

We are given that the ratio of D to A is 4 to 72,

We can write that as 4:72.

Since students got 1080 A's. we can divide 1080 by 72 to help us find the answer.

1080/72=15

We know that the relationship between the amount of D's simplified and the actual amount of D's is equal to 15 times. So we do the given amount (4) multiplied by 15 (4*15) to get 60.

Please let me know if you have any questions.

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Feliz [49]

Answer:

Radius: 7.5 cm ; Diameter: 15 cm

Step-by-step explanation:

The radius of a circle is basically the middle "halfway" point and in this case, it has already been given, 7.5 cm. The diameter is the middle line of the circle and to find the diameter, you must multiply the radius by 2, which is essentially 7.5 cm*2, and this gives you a diameter of 15 cm.

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1 year ago

What is the domain for each function below? Choose the correct inequality symbol from the drop down menu and fill in the blank w

erik [133]

Answer:

$x \le 3$

$x \ge 0$

Step-by-step explanation:

The functions, missing from the question are:

$f(x) = \sqrt{3 - x$

$f(x) = \sqrt{3 x$

Required

Determine the domain

To get the domain, means we want to get the possible values of x.

(a)

$f(x) = \sqrt{3 - x$

Equate 3 - x to 0

$3 - x = 0$

Solve for x

$-x = -3$

$x = 3$

From the calculated value of x above;

When x exceeds 3; f(x) = undefined

So: the domain is:

$x \le 3$

(b)

$f(x) = \sqrt{3x$

Equate 3x to 0

$3x = 0$

Solve for x

$x = 0$

From the calculated value of x above;

When x falls below 0; f(x) = undefined

So: the domain is:

$x \ge 0$

4 0

2 years ago

The three expressions, sin-2, cos-1, and tan-1 are called _<br> trigonometric functions

Alex_Xolod [135]

Answer:

Inverse.

Step-by-step explanation:

Inverse trigonometric functions.

e. g. tan-1 x means 'the angle whose tangent is x'.

They are also called arcsin, arccos and arctan.

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3 years ago

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zhuklara [117]

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3 years ago

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gayaneshka [121]

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3 years ago