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2 years ago

In the diagram, ABC is a right - angled triangle.

Mathematics

1 answer:

Firdavs [7]2 years ago

4 0

$\to \rm \sin(30) = \dfrac{AC }{AB}$

$\\ \\$

$\to \rm \sin(30) = \dfrac{AC }{40}$

$\\ \\$

$\to \rm \dfrac{1}{2} = \dfrac{AC }{40 \degree}$

$\\ \\$

$\to \rm \dfrac{40}{2} =AC$

$\\ \\$

$\to \rm \: AC = 20 m$

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Alecsey [184]

Football State University = $21.42 for one game

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5 0

3 years ago

Read 2 more answers

What 2/9rounded to the nearest whole number

Arte-miy333 [17]

The answer is 3 because if you were to round 2.9 the next whole up from that is 3

4 0

3 years ago

The sum of ruqiyo’s age and Mohammed’s age is 117. Five times ruqiyo’s age is 9 more than 3 times mohammed’s age. How old is eac

Bess [88]

Answer:

45 and 72

Step-by-step explanation:

Let the ages be r and m

We have:

r + m = 117
5r = 9 + 3m

Substitute m in the second equation and solve for r:

m = 117 - r
5r = 9 + 3( 117 - r)
5r = 9 + 351 - 3r
5r + 3r = 360
8r = 360
r = 360/8
r = 45

Then m is

m = 117 - 45 = 72

3 0

3 years ago

Every prime number greater than 10 has a digit in the ones place that is include in wich set of numbers A- 1,3,7,9 B-1,3,5,9 D-1

marta [7]

That's very interesting. I had never thought about it before.
Let's look through all of the ten possible digits in that place,
and see what we can tell:

-- 0:
   A number greater than 10 with a 0 in the units place is a multiple of
   either 5 or 10, so it's not a prime number.

-- 1:
    A number greater than 10 with a 1 in the units place could be
    a prime (11, 31 etc.) but it doesn't have to be (21, 51).

-- 2:
   A number greater than 10 with a 2 in the units place has 2 as a factor
   (it's an even number), so it's not a prime number.

-- 3:
   A number greater than 10 with a 3 in the units place could be
   a prime (13, 23 etc.) but it doesn't have to be (33, 63) .

-- 4:
   A number greater than 10 with a 4 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 5:
   A number greater than 10 with a 5 in the units place is a multiple
   of either 5 or 10, so it's not a prime number.

-- 6:
   A number greater than 10 with a 6 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 7:
   A number greater than 10 with a 7 in the units place could be
   a prime (17, 37 etc.) but it doesn't have to be (27, 57) .

-- 8:
   A number greater than 10 with a 8 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 9:
   A number greater than 10 with a 9 in the units place could be
   a prime (19, 29 etc.) but it doesn't have to be (39, 69) .

So a number greater than 10 that IS a prime number COULD have
any of the digits 1, 3, 7, or 9 in its units place.

It CAN't have a 0, 2, 4, 5, 6, or 8 .

The only choice that includes all of the possibilities is 'A' .

4 0

3 years ago

Julia has 8 red barrettes 2/4 of her barrettes are red how many barrettes does Julia have

kipiarov [429]

Answer:16

Step-by-step explanation:

2/4 = 1/2

8+8=16

4 0

2 years ago