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3 years ago

21 less than tree-fifths of a number

Mathematics

1 answer:

MissTica3 years ago

3 0

Answer:

$\frac{3}{5}x - 21$

Step-by-step explanation

Three-fifths of a number means $\frac{3}{5}x$ and 21 less than that number means $\frac{3}{5} x - 21$ .

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How many 4 person committees are possible from a group of 12?

larisa86 [58]

This is a combination question
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6 0

3 years ago

In an arithmetic series, what is the sum of the first 22 terms if the first term is 12 and the common difference is 3?

Vilka [71]

Answer:

561

Step-by-step explanation:

an = dn - (a-d)

The difference is 3.

The first term is 12.

an = 3n - (12-3)

an = 3n - 9

Put n as 1, 2, 3, 4, 5 ....22.

3(1) - 9 = -6

3(2) - 9 = -3

3(3) - 9 = 0

3(4) - 9 = 3

3(5) - 9 = 6

...

3(22) - 9 = 57

Add the first 22 terms.

-6+-3+0+3+6+9+12+15+18+21+24+27+30+33+36+39+42+45+48+51+54+57

= 561

4 0

2 years ago

Median math question

Feliz [49]

Answer:

Step-by-step explanation:

25,16,21,30

Put the numbers in order from smallest to largest

16,21,25,30

The median is the middle and the median is 25 so the new number must be 25 or larger

The only number on the the list that is 25 or largest is 27

8 0

3 years ago

PLEASE HELP WITH QUESTION. I am taking a test right now with little time left.

Gwar [14]

1834 bfc I believe that’s the right answer

8 0

2 years ago

PLEASE HELP?? If arc AB = 70°, how many degrees are in ∠ ADB? A) 35° B) 50° C) 70° D) 110°

defon

Answer:

∠ADB=35°

Step-by-step explanation:

Given arc AB = 70°.

we have to find the angle ∠ADB

Here, Angle subtended by arc AB at O is ∠AOB = 70°

By the theorem,

The angle subtended by an arc at the center is double the angle subtended by it at any point on the remaining part of the circle.

∴ ∠AOB=2(∠ADB)

⇒ $\angle ADB=\frac{1}{2}\angle AOB=\frac{1}{2}70^{\circ}= 35^{\circ}$

hence, angle subtended at the circumference is 35°

3 0

3 years ago